Mock Exam Notes Flashcards
tear drop poikilocytes
myelofibrosis
chlamydia treatment
doxycycline is preferable to azithromycin
management of stroke and TIA
clopidogrel
carotid endarterectomy only if stenosis >50 or 70% depending on guideline
ethylene glycol toxicity management
fomepizole
also ethanol
and haemodialysis if metabolic acidosis has developed
testing for haemochromatosis
general population - transferrin saturation > ferritin
family member of affected = HFE genetic testing
why would coeliac testing be negative if all symptoms correlate
selective IgA deficiency
CML translocation
t(9:22)(q34:q11). BCR-ABL gene
poor prognosis in ALL
Burkitts translocation
t8:14
MYC oncogene
Mantle cell translocation
t11:24, cyclin D1 (BCL1) gene
Follicular lymphoma translocation
t14:18
APML translocation
t15:17
fusion of PML and RAR-alpha
Beta blocker overdose
atropine, IV glucagon in resistant cases
renal transplant + infection
?CMV
loud S1 in
mitral stenosis
soft S2 in
aortic stenosis
S3 heard if
LVF (dilated cardiomyopathy) - gallop rhythm
constrictive pericarditis (pericardial knock)
mitral regurg
S4 heard when
aortic stenosis
HOCM (double apical impulse)
HTN
coincides with p wave on ECG
P450 inducers
(ie lowered INR)
SCRAP GPS
sulfonylureas
carbamazepine
rifampin
alcohol (CHRONIC)
phenobarbital
griseofulvin
phenytoin
st johns wort
P450 inhibitors
(ie raised INR)
SICKFACESCOM
sulfonamides
isoniazid
cimetidine
ketoconazole
fluconazole
alcohol (ACUTE)
ciprofloxacin
erythromycin
sodium valproate
chloramphenicol
omeprazole
metronidazole
Barrter’s syndrome
autosomal recessive
severe hypokalaemia
defect in NKCC2 in asc LOH
normotension
presents with failure to thrive, polyuria and polydipsia and weakness
Alport’s syndrome
x linked dominant
defect in gene for T4 collagen leading to abnormal GBM
more severe in males
failing renal transplant
presents with-
microscopic haematuria
progressive renal failure
bilateral sensorineural deafness
lenticonus
retinitis pigmentosa
splitting of lamina densa on electron microscopy
diagnosis - molecular genetic testing
renal biospy - basket-weave appearance
screening test for ADPKD
USS abdo
causes of upper zone fibrosis
CHARTS
coal workers pneumoconiosis
histiocytosis/hypersensitivity pneumonitis
ank spond
radiation
TB
sarcoid/silicosis
causes of lower zone fibrosis
IPF
CTD
Drug - amiodarone, bleomycin, methotrexate
Asbestosis
normal ABPI
0.9-1.2 (<0.9 = arterial disease, also >1.2 in diabetics with calcification)
Churg-strauss stages of presentation
1) allergy - asthma, allergic rhinitis -> nasal polyps
2) eosinophilia
3) vasculitis -> kidneys, lungs, heart
Marfan’s is due to a defect in
fibrillin-1
COPD Mx
1st line = SABA/SAMA
asthmatic features?
N = LABA+LAMA
Y = LABA+ICS -> +LAMA
theophyllines only after ^ if cannot have inhaled
Heyde’s syndrome
aortic stenosis and colonic angiodysplasia
reduction in vWF as blood passes through narrow valve
idiopathic membranous glomerulonephritis
antiphospholipase A2 antibodies
MGN - spike and dome
fixed and dilated pupil with down and out eye, following history of traumaa
raised ICP -> third nerve palsy due to uncal or trans-tentorial herniation
GPA presentation
upper respiratory tract signs, haemoptysis, epistaxis/earache, crusting, sinusitis, hearing loss, blocked/runny nose
ENT + RESP + KIDNEY
drug-induced lupus causes
procainamide
hydralazine
isoniazid
minocycline
phenytoin
which organelle is responsible for the catabolism of long chain fatty acids
peroxisome
HLA A3
haemochromatosis
HLA B51
Behcets
HLA B27
Ank spond
reactive arthritis
acute anterior uveitis
psoriatic arthritis
HLA DQ2/DQ8
coeliac
HLA DR2
narcolepsy
Goodpastures
HLA DR3
dermatitis herpetiformis
Sjogrens
PBC
HLA DR4
T1DM
RA - DRB1 gene
which cytokine activates macrophages
IFN gamma
IL2 is secreted from
macrophages
IL3 stimulates
proliferation and differentiation of myeloid progenitor cells
IL4 is responsible for
proliferation of B cells
TNF alpha is responsible for
acute fevers and neutrophil chemotaxis
CD 15 is found on
Reed-Sternberg cells
CD1 is
MHC molecule that presents lipid molecules
CD4
found on helper T cells
co-receptor for MHC class 2
used by HIV to enter T cells
CD5
mantle cell lymphomas
CD8
found on cytotoxic T cells
co-receptor for MHC class 1
myeloid dendritis cells
CD14
cell surface marker for macrophages
CD16
binds to Fc portion of IgG antibodies
CD21
receptor for EBV
CD28
interacts with B7 on antigen presenting cell
CD56
marker for NK cells
CD95
FAS receptor, apoptosis
MI secondary to cocaine should be given
IV benzodiazepines
mechanism of cyanide toxicity
inhibits mitochondrial enzyme cytochrome c oxidsae
depletion of glutathione stores
paracetamol toxicity
Cushing reflex
hypertension and bradycardia
attempt to increase MAP
Waldenstrom’s
organomegaly with no bone lesions
no bone pain - instead hyperviscosity pain eg headaches
can still have bence jones protein
first line investigation for stable chest pain of suspected CAD aetiology
contrast enhanced coronary CT angiography
paralysis of all intrinsic hand muscles
C8-T1 nerve root damage
Klumpke
Erb’s palsy
C5-6
loss of sensation in arm and paralysis of deltoid, biceps and brachialis
Lateral medullary syndrome
facial and contralateral body loss of pain sensation along with nystagmus and ataxia
PICA stroke
AICA - same but with same side face weakness and loss of hearing
C5-9 deficiency
predisposes to neisseria meningitidis infections
C1q, C1rs, C2, C4 deficiency (classic pathway components)
predisposes to SLE
C5 deficiency
Leiner disease - diarrhoea, wasting, seborrhoeic dermatitis
C1 inh deficiency
hereditary angioedema
C3 deficiency
recurrent bacterial infections
cataracts - drug cause
steroids
corneal opacities - drug cause
amiodarone, indomethacin
optic neuritis - drug cause
ethambutol
amiodarone
metronidazole
sildenafile eye ADR
blue discolouration
non-arteritic anterior ischaemic neuropathy
inverted champagne bottle legs and clumsiness
CMT
Gastrin
G cells in antrum of stomach
distension of stomach, vagus nerves
inhibited by low pH, somatostatin
increases acid secretion by gastric parietal cells, pepsinogen and IF secretion, increases gastric motility
CCK
I cells in upper small intestine
Increases secretion of enzyme-rich fluid from pancreas, contraction of gallbladder and relaxation of sphincter of Oddi, decreases gastric emptying, trophic effect on pancreatic acinar cells, induces satiety
secretin
S cells in upper small intestine
Increases secretion of bicarbonate-rich fluid from pancreas and hepatic duct cells, decreases gastric acid secretion, trophic effect on pancreatic acinar cells
VIP
small intestine, pancreas
Stimulates secretion by pancreas and intestines, inhibits acid secretion
Somatostatin
D cells in pancreas and stomach
Decreases acid and pepsin secretion, decreases gastrin secretion, decreases pancreatic enzyme secretion, decreases insulin and glucagon secretion
inhibits trophic effects of gastrin, stimulates gastric mucous production
AV block can occur following
inferior MI
cell cycle
G0 - resting, quiescent cells (hepatocytes, neurons)
G1 - cells increase in size, determines length of cell cycle, influence p53
S - synthesis of DNA, RNA, histone; centrosome duplication
G2 - cells continue to increase in size
M - mitosis, cell division, shortest phase
Jarisch herxheimer
fever, rash, tachycardia after the first dose of antibiotic
in contrast to anaphylaxis, there is no wheeze or hypotension
it is thought to be due to the release of endotoxins following bacterial death and typically occurs within a few hours of treatment
no treatment is needed other than antipyretics if required
in which stage of mitosis does vincristine act
metaphase
taxanes - metaphase
antimetabolites - S phase
anthracyclines - S phase
topoisomerases - mitosis and meiosis
pathogenesis of Fanconi syndrome
generalised disorder affecting tubular resorption in the PCT
There is increased excretion of nearly all amino acids, glucose, bicarbonate, phosphates, uric acid and potassium. Features include polyuria, polydipsia, rickets, hypokalaemia, hypophosphatemia, growth failure and acidosis.
Liddle’s syndrome mutation
inability to degrade epithelial sodium channels located at the DCT
Classically patients may experience hypertension, hypokalaemia and metabolic alkalosis. Amiloride counters this by selectively blocking the epithelial sodium transport channels in the DCT and collecting duct.
Gitelman syndrome
rare autosomal recessive disorder which occurs due to a mutation causing a resorptive defect of the sodium chloride co-transporter. It is characterised by hypokalemia-hypomagnesemia and alkaline urine.
bilateral spastic paresis and loss of pain and temperature sensation
anterior spinal artery occlusion
The anterior spinal artery supplies the anterior portion of the spinal cord. This leads to bilateral motor and sensory paralysis below the level of the infarct. There is sparing of the dorsal column medial lemniscal pathway preserving proprioception. As well as this autonomic dysfunction inferior to the level of the lesion is seen. This condition is most commonly due to atherosclerosis, risk factors include diabetes, hypertension and anything else causing a hypercoagulable state.
ECG abnormalities associated with hypercalcaemia
shortening of the QT interval. Osborne (J) waves may also be seen in more severe cases. If the hypercalcaemia is not corrected, ventricular arrhythmias like Ventricular Fibrillation can develop.
dexamethasone suppression test
Cushing’s disease (ACTH secreting pituitary adenoma), cortisol is not suppressed by low-dose dexamethasone but is suppressed by high-dose dexamethasone
exogenous steroid use, the plasma ACTH would be decreased
With ectopic ACTH from small cell lung cancer, cortisol would not be suppressed by low dose or high-dose dexamethasone.
With cortisol secretion from an adrenal adenoma, cortisol would not be suppressed by low-dose or high-dose dexamethasone.
salicylate overdose mx
general (ABC, charcoal (within an hour of OD))
urinary alkalinization with intravenous sodium bicarbonate - enhances elimination of aspirin in the urine
haemodialysis
triangle of safety for chest drain
base of the axilla, lateral edge pectoralis major, 5th intercostal space and the anterior border of latissimus dorsi
eczema herpeticum cause
HSV1
coxsackie
first hormone secreted in response to hypoglycaemia
glucagon -> GH and cortisol
coved ST-segment elevation in leads V1-V3 with T wave inversion, gene mutation
SCN5A
CASQ2 is a gene for cardiac calsequestrin, a calcium-binding protein that plays a key role in cardiac regulation. Mutations in this gene lead to catecholaminergic polymorphic ventricular tachycardia (CPVT).
KCNQ1 and KCNH2 are both genes encoding for potassium channels. Defects in these can lead to long-QT syndrome (Romano-Ward) or short-QT syndrome.
RYR2 encodes for the ryanodine receptor found in cardiac muscle. Mutations in RYR2 are associated with catecholaminergic polymorphic ventricular tachycardia (CPVT) and arrhythmogenic right ventricular dysplasia.
widening of wrist joints
rickets, due to excess non-mineralised osteoid at growth plate
microtubule function
guide movement during intracellular transport and help bind internal organelles
what can reduce absorption of levothyroxine
iron
calcium carbonate
chlamydia psittaci treatment
tetracyclines
macrolides
fastest conduction velocities in the heart
Purkinje fibres
lung volumes
Tidal volume (TV)
volume inspired or expired with each breath at rest
500ml in males, 350ml in females
Inspiratory reserve volume (IRV) = 2-3 L
maximum volume of air that can be inspired at the end of a normal tidal inspiration
inspiratory capacity = TV + IRV
Expiratory reserve volume (ERV) = 750ml
maximum volume of air that can be expired at the end of a normal tidal expiration
significantly reduced in obesity (increased abdominal fat mass pushes up against the diaphragm, reducing the volume of air that can be expelled)
Residual volume (RV) = 1.2L
volume of air remaining after maximal expiration
increases with age
RV = FRC - ERV
Functional residual capacity (FRC)
the volume in the lungs at the end-expiratory position
FRC = ERV + RV
Vital capacity (VC) = 5L
maximum volume of air that can be expired after a maximal inspiration
4,500ml in males, 3,500 mls in females
decreases with age
VC = inspiratory capacity + ERV
Total lung capacity (TLC) is the sum of the vital capacity + residual volume
Physiological dead space (VD)
VD = tidal volume * (PaCO2 - PeCO2) / PaCO2
where PeCO2 = expired air CO2
thyroid scans
The combination of hyperthyroid symptoms, blood results, and patchy uptake on nuclear scintigraphy point towards a diagnosis of toxic multinodular goitre.
In Graves disease, scintigraphy would show diffuse enlargement of both thyroid lobes, with uniform uptake throughout.
A solitary adenoma would present similarly to toxic multinodular goitre, but you would expect nuclear scintigraphy to show a small focus of uptake.
tricyclic overdose management
IV bicarbonate
first-line therapy for hypotension or arrhythmias
indications include widening of the QRS interval >100 msec or a ventricular arrhythmia
other drugs for arrhythmias
+ class 1a (e.g. quinidine) and class Ic antiarrhythmics (e.g. Flecainide) are contraindicated as they prolong depolarisation
class III drugs such as amiodarone should also be avoided as they prolong the QT interval
response to lignocaine is variable and it should be emphasized that correction of acidosis is the first line in the management of tricyclic-induced arrhythmias
intravenous lipid emulsion is increasingly used to bind free drug and reduce toxicity
dialysis is ineffective in removing tricyclics
ITP bone marrow exam
increased megakaryocytes
metastatic bone pain mx
analgesia
bisphosphonates
radiotherapy
prophylaxis for contacts of patients with meningococcal meningitis
oral ciprofloxacin or rifampicin
most common and severe form of renal disease in SLE patients
diffuse proliferative GN
renal tubular acidosis causes metabolic acidosis with
normal anion gap
painful third nerve palsy
PCA aneurysm
CLL investigation of choice
immunophenotyping (will demonstrate Bcells CD19 positive)
Flecainide MOA
blocking the Nav1.5 sodium channels in the heart
SGLT2 inhibitors site of action
early PCT
most specific ECG finding in acute pericarditis
PR depression
nephrotic syndrome + malignancy
membranous glomerulonephritis
lymphomas cause MCD
AML good prognosis
t15:17 APML
NAFLD, next investigation
enhanced liver fibrosis blood test
causes of rapidly progressive glomerulonephritis
Goodpastures
ANCA
MEN2B
medullary cancer, phaeo, marfan
When differentiating between MEN 2A and 2B, it is worth remembering that MEN 2B has similar characteristics as MEN 2A (Thyroid carcinoma’s, Adrenal tumours, Parathyroid hyperplasia) but in addition typically have a Marfanoid appearance and mucosal neuromas, as well as the absence of hyperparathyroidism.
MEN type 1 is characterised by pancreatic neuroendocrine tumours, pituitary adenoma and parathyroid hyperplasia.
ABPA treatment
systemic glucocorticoid
oral antifungals adjunct
disproportionate microcytic anaemia with raised HbA2
beta thalassaemia trait
CLL treatment
FCR
PBC
IgM
antimitochondrial antibodies, M2 subtypes
middle aged females
sicca syndrome
prolactin release is
inhibited by dopamine
upregulated by TRH and oestrogen
inhibitS GnRH and LH
Brown-sequard syndrome
Contralateral loss of temperature, ipsilateral loss of fine touch and vibration, ipsilateral spastic paresis
The spinothalamic tract decussates at the same level the nerve root enters the spinal cord. The corticospinal tract, dorsal column medial lemniscus, and spinocerebellar tracts decussate at the medulla
PCT diagnosis
urine uroporphyrinogen
serum and urine porphobilinogen
AIP
eosinophilia and mononeuritis multiplex after starting new med for asthma
monteleukast can unmask churg-strauss
management of HACE and HAPE
Management of HACE -
descent
dexamethasone
Management of HAPE -
descent
nifedipine, dexamethasone, acetazolamide, phosphodiesterase type V inhibitors*
oxygen if available
troponin binding
I to actin
T to tropomyosin
C to calcium ions
drugs which exhibit zero order kinetics
phenytoin
alcohol
salicylates
FISH
uses fluorescent DNA or RNA probe to bind to specific gene site of interest for direct visualisation of chromosomal anomalies
causes of drug-induced photosensitivity
thiazides
tetracyclines, sulphonamides, ciprofloxacin
amiodarone
NSAIDs e.g. piroxicam
psoralens
sulphonylureas
severe alcoholic hepatitis
steroids
anal fissure management
Management of an acute anal fissure (< 1 week)
soften stool
dietary advice: high-fibre diet with high fluid intake
bulk-forming laxatives are first-line - if not tolerated then lactulose should be tried
lubricants such as petroleum jelly may be tried before defecation
topical anaesthetics
analgesia
Management of a chronic anal fissure
the above techniques should be continued
topical glyceryl trinitrate (GTN) is first-line treatment for a chronic anal fissure
if topical GTN is not effective after 8 weeks then secondary care referral should be considered for surgery (sphincterotomy) or botulinum toxin
SIADH underlying mechanism causing hyponatraemia
Antidiuretic hormone promotes water reabsorption by the insertion of aquaporin-2 channels
pseudoxanthoma elasticum
autosomal recessive
retinal angioid streaks
‘plucked chicken skin’ appearance - small yellow papules on the neck, antecubital fossa and axillae
cardiac: mitral valve prolapse, increased risk of ischaemic heart disease
gastrointestinal haemorrhage
cryptosporidium diagnosis
Ziehl-neelsen modified staining of stool
evolving pattern of lesions of individual nerves, pain (ful sensory loss)
MM
PAN can cause
prominent V waves on JVP
tricuspid regurg
cannon A waves
CHB and atrial flutter
absent A waves
atrial fibrillation
slow Y descent
tricuspid stenosis or cardiac tamponade
exaggerated X descent
constrictive pericarditis
prognosis in pancreatitis
PANCREAS
PaO2 <8
Age >55
Neutrophilia
Calcium <2
Renal - urea >16
enzymes; LDH and AST
Albumin <32
Sugar - glucose >10
anti-NMDA receptor encephalitis
associated with ovarian teratoma
psychiatric symptoms, seizures, autonomic instability
hepatitis is associated with which cryoglobulinaemia
mixed T2
type 1 cryoglobulinaemia
lymphoproliferative disorders with immunology demonstrating presence of monoclonal IgG or M
RAYNAUDS
marbled appearance of bone
osteopetrosis
normal Ca, phosph, ALP and PTH
Osteitis fibrosa cystica - replacement of bone mass with fibrosis and development of brown tumours. Patients have raised ALP, raised calcium, raised PTH and low phosphate.
Osteomalacia - low calcium and low phosphate with increased ALP and increased PTH.
Osteogenesis imperfecta type 3 - disorder of collagen formation leading to brittle bone, bone deformities and blue sclera amongst other features.
Osteopetrosis - normal calcium, phosphate, ALP and PTH levels.
Paget’s disease - calcium, phosphate and PTH unaffected with ALP raised.
disseminated gonococcal infection triad
tenosynovitis
migratory polyarthritis
dermatitis
oxygen dissoc curve left shift (lower o2 delivery)
Low [H+] (alkali)
Low pCO2
Low 2,3-DPG
Low temperature
oxygen dissoc curve R shift (raised O2 delivery)
Raised [H+] (acidic)
Raised pCO2
Raised 2,3-DPG
Raised temperature
electrolyte imbalance potentiating digoxin toxicity
lower potassium levels lead to higher levels of digoxin binding to the ATPase pump
paracetamol overdose occurs when glutathione stores run out leading to
an increase in NAPQI (n actely p benzoquinone imine)
whipple’s disease
diarrhoea, weight loss, arthralgia, lymphadenopathy, ophthalmoplegia
how does alcohol binging lead to polyuria
inhibition of posterior pituitary gland
subacute combined degeneration of the cord
loss of proprioception and vibration sense (dorsal columns) + lateral columns are also affected and would cause spasticity and brisk knee reflexes. Babinski sign is typically positive
genetic cause of nephrogenic DI
vasopressin receptor
aquaporin 2 channel
familial mediterranean fever
autosomal recessive, hereditary inflammatory disorder characterised by reoccurring episodes of abdominal pain, fever, arthralgia, and chest pain
warfarin management of high INR
Major bleeding (e.g. variceal haemorrhage, intracranial haemorrhage) -
Stop warfarin
Give intravenous vitamin K 5mg
Prothrombin complex concentrate - if not available then FFP*
INR > 8.0 + Minor bleeding -
Stop warfarin
Give intravenous vitamin K 1-3mg
Repeat dose of vitamin K if INR still too high after 24 hours
Restart warfarin when INR < 5.0
INR > 8.0 + No bleeding -
Stop warfarin
Give vitamin K 1-5mg by mouth, using the intravenous preparation orally
Repeat dose of vitamin K if INR still too high after 24 hours
Restart when INR < 5.0
INR 5.0-8.0 + Minor bleeding -
Stop warfarin
Give intravenous vitamin K 1-3mg
Restart when INR < 5.0
INR 5.0-8.0 + No bleeding -
Withhold 1 or 2 doses of warfarin
Reduce subsequent maintenance dose
de clerambaults
famous in love
in a patient with hypercalciuria and renal stones
give thiazide diuretics
usually cause hypercalc, but not in urine
rifampicin MOA
inhibits RNA synthesis
penicillins, cephalosporins and carbapenems MOA
cell wall synthesis - peptidoglycan cross-linking
glycopeptides (vanc) MOA
cell wall synthesis - peptidoglycan synthesis
quinolones MOA
inhibit DNA topoisomerase
metronidazole MOA
damages DNA
trimethoprim MOA
dihydrofolate reductases
sulfonamides MOA
dihyrdopteroate synthase
aminoglycosides and tetracyclines MOA
protein synthesis - 30S
macrolides, chloramphenicol, clindamycin, linezolid, streptogrammins MOA
protein synthesis - 50S
tolbutamide drug class
sulfonylureas
hypnagogic jerks occur during
nREM1
REM - lucid dreaming and the absence of the normal atonia
metabolic ketoacidosis with normal or low glucose
think alcoholic ketoacidosis
angular cheilitis
vitamin B2 riboflavin deficiency
thyrotoxic storm treatment
Bb, PTU and hydrocort
overuse of NaCl
hyperchloraemic metabolic acidosis
Budd Chiari syndrome triad
abdo pain
ascites -> distension
tender hepatomegaly
USS with doppler flow studies
Paget’s disease biochemical marker
urine hydroxyproline
expressivity describes
the extent to which a genotype shows its phenotypic expression in an individual
relapsing polychondritis
ear problems, nasal chondritis, respiratory tract involvement, arthralgia
blood group A is associated with increased risk of
gastric cancer
pancreatic cancer sign
double duct
LMWH MOA
activation of AT3
Cushings VBG
hypokalaemic metabolic alkalosis
Addisons VBG
hyperkalaemic metabolic acidosis
aminoglycoside toxicity is secondary to
acute tubular necrosis
what is protective in paracetamol OD
acute alcohol intake
adhesive capsulitis which movement most affected
ext rot
SJS vs TEN
10% vs >30% of BSA
Hashimotos increases risk of development of
MALT lymphoma
Horners syndrome
First-order - where the lesion is central, occurring anywhere from the hypothalamus, through the midbrain to the synapse at T1.
head, arm, trunk = central lesion: stroke, syringomyelia
Second-order - where the lesion is between the synapse in the spinal cord to the superior cervical ganglion.
just face = pre-ganglionic lesion: Pancoast’s, cervical rib
Third-order - where the lesion is post-ganglionic occurring anywhere above the superior cervical ganglion.
absent = post-ganglionic lesion: carotid artery
where is phosphate reabsorbed
proximal tubule
Fabry’s disease inheritance
XLR
what class of receptors does adrenaline work on
GPCR
pilocarpine drug class
musc agonist
microscopic colitis
chronic diarrhoea
colonoscopy and biopsy
Microscopic colitis typically presents with persistent watery diarrhoea. Colonoscopy plus random colonic biopsies are essential for the definitive diagnosis of microscopic colitis. The colon often appears macroscopically normal, with biopsies showing a mononuclear cell infiltration of the lamina propria with either a thickened subepithelial collagen band (in collagenous colitis) or intraepithelial cell lymphocytosis (in lymphocytic colitis). Proton-pump inhibitors, and in particular, lansoprazole, are associated with the development of microscopic colitis, making this the best answer.
systemic mastocytosis
abdo pain, flushing, urticaria pigmentosa - urinary histamine
myoclonic seizures
valproate first line for males
females - levetiracetam
methaemoglobinaemia treatment
if congenital - IV ascorbic acid
if not - methylene blue
which molecule is added to the enzyme by the golgi apparatus to tag it for transport to the lysosome
mannose 6-phosphate
SJS drug causes
lamotrigine
phenytoin
carbamazepine
publication bias diagram
funnel plots
when starting SSRI in someone on NSAID
give PPI
liver transplant criteria
Arterial pH < 7.3, 24 hours after ingestion
or all of the following:
prothrombin time > 100 seconds
creatinine > 300 µmol/l
grade III or IV encephalopathy
which blood tests monitor haemochromatosis
ferritin and transferrin saturation
causes of restrictive lung disease
Pulmonary fibrosis
Asbestosis
Sarcoidosis
Acute respiratory distress syndrome
Infant respiratory distress syndrome
Kyphoscoliosis e.g. ankylosing spondylitis
Neuromuscular disorders
Severe obesity
causes of obstructive lung disease
asthma
COPD
bronchiectasis
bronchiolitis obliterans
alpha 1 antitrypsin genotypes
normal: PiMM
heterozygous: PiMZ
evidence base is conflicting re: risk of emphsema
however, if non-smoker low risk of developing emphsema but may pass on A1AT gene to children
homozygous PiSS: 50% normal A1AT levels
homozygous PiZZ: 10% normal A1AT levels (MANIFEST DISEASE)
bone pain, tenderness and proximal myopathy (waddline gait)
osteomalacia
D3 supplementation
NIV works in range
7.25-35
pentad of TTP
fever
neurological dysfunction
evidence of haemolysis on blood film
renal injury
thrombocytopaenia
An acquired inhibition of ADAMTS13, preventing the cleavage of von Willebrand Factor multimers
prolapsed disc
L3 nerve root compression -
Sensory loss over anterior thigh
Weak hip flexion, knee extension and hip adduction
Reduced knee reflex
Positive femoral stretch test
L4 nerve root compression -
Sensory loss anterior aspect of knee and medial malleolus
Weak knee extension and hip adduction
Reduced knee reflex
Positive femoral stretch test
L5 nerve root compression -
Sensory loss dorsum of foot
Weakness in foot and big toe dorsiflexion
Reflexes intact
Positive sciatic nerve stretch test
S1 nerve root compression -
Sensory loss posterolateral aspect of leg and lateral aspect of foot
Weakness in plantar flexion of foot
Reduced ankle reflex
Positive sciatic nerve stretch test
terbinafine MOA
inhibits squalene epoxidase
griseofulvin MOA
interacts with microtubulues to disrupt mitotic spindle
amphoB MOA
binds with ergosterol forming a transmembrane channel
flucytosine MOA
converted by cytosine deaminase to 5-fluorouracil, which inhibits thymidylate synthase and disrupts fungal protein synthesis
caspofungin MOA
inhibits synthesis of beta-glucan
metformin MOA
activation of AMPK
PSC choice investigation
ERCP/MRCP
syringomyelia affects which spinal cord structure
compression of the spinothalamic tract fibres decussating in the anterior white commissure of the spine
Japanese encephalitis
Clinical features of Japanese encephalitis are headache, fever, seizures. Parkinsonian features indicate basal ganglia involvement.
common complication of plasma exchange
hypocalcaemia
due to citrate use
cisplatin electrolyte disturbance
hypomagnesaemia
polychromatic macrocytes what type of cell
reticulocytes
have a mesh-like (reticular) network of ribosomal RNA that is visible when stained. This is not present in mature erythrocytes
matching HLA in transplant, importance
DR > B > A
tolvaptan drug class
VP receptor 2 antagonist
used for ADPKD
Hodgkins lymphoma receive which blood product
irradiated packed red cells - avoid gvhd
PBC management
first-line: ursodeoxycholic acid
slows disease progression and improves symptoms
pruritus: cholestyramine
fat-soluble vitamin supplementation
liver transplantation
e.g. if bilirubin > 100 (PBC is a major indication)
recurrence in graft can occur but is not usually a problem
campylobacter treatment
clarithromycin
cipro 2nd
majority of glucose reabsorption in the nephron occurs within
PCT
in gestational diabetes if already on metformin
add insulin
codeine to morphine conversion
divide by 10
organophosphate poisoning
Medical management of organophosphate poisoning involves resuscitation, critical care and airway maintenance, and administration of atropine.
dermatomyositis antibodies
ANA most common
anti mi 2 most specific
polymyositis antibodies
anti jo1
atherosclerosis stages
(1) Endothelial dysfunction is the initial stage - triggered by risk factors - resulting in a pro-inflammatory, pro-oxidant, proliferative state.
(2) This allows for the fatty infiltration of the subendothelial space by low-density lipoprotein (LDL) particles.
(3) Leukocytes are recruited to the site of development due proinflammatory cytokines, which are partly maintained by LDL.
(4) Over time, these phagocytose LDLs and other lipoproteins, becoming foam cells which contribute to the overall structure of the plaque.
(5) Smooth muscle cell proliferation and migration is the final step in the formation of atheroma, leading to the development of a fibrous capsule over the fatty plaque.
Marfanoid features, learning difficulties, downward lens dislocation, myopia, malar flush
homocystinuria
treatment is pyridoxine - vitamin B6
lithium desensitises the kidney’s ability to respond to ADH in the
collecting ducts
drug causes of urticaria
aspirin
penicillins
NSAIDs
opiates
sulfonylureas MOA
Binds to and shuts pancreatic beta cell ATP-dependent K+ channels, causing membrane depolarisation and increased insulin exocytosis
mixed connective tissue disease antibody
anti-ribonuclear protein antibodies
strongyloides treatment
ivermectin and bendazoles
levothyroxine acts via
nuclear receptors