Last Minute toughies Flashcards
What can cause pseudo-obstruction in GI
- DIFFUSE SCLERODERMA
2. Parkinson’s
What mediators activate fibroblasts in Scleroderma
- IL-1
- IL-4
- IL-6
- IL-8
- TGF-B
- PDGF
What viruses can cause Polymyositis
- Coxsackie
- Rubella
- Influenza
What encodes HLA B27 gene
MHC on chromosome 6
What is raised in Myositis
- CRP
2. ESR is NOT raised
Specific autoantibody found in RA
Anti-CCP
Specific autoantibody found in Polymyositis/Dermatomyositisi
- Anti Jo-1
2. Anti-Mi-2
Specific autoantibody found in Scleroderma
- Anti-Scl70 (diffuse)
- Anti-Ro
- Anti Centromere (limited)
What antigen is Sjogren Syndrome associated with
HLA-B8/DR3
What condition can Sjogren’s syndrome lead to
Non-Hodgkin’s Lymphoma:
Diffuse large B-cell lymphoma
Marginal zone lymphoma
What antigen is APS associated with
DR7
What genes are responsible for peak bone mass
- Collagen type 1A1
- Vit D recpetor
- Oestrogen receptor gene
Blood test results for SLE
- Raised ESR
- Normal CRP
- Anaemia of chronic disease
- Urea and creatinine raised
- C3/C4 reduced
- Anti-Ro
- Anti-La
- Anti-Smith
- Anti-dsDNA
- Rheumatoid Factor
- Anti-ANA
Blood tests seen in all Vasculitis
- ANCA negative
- Serum alkaline phosphatase raised
- Normochromic normocytic anaemia
What disease is PAN associated with
Hep B
How do kidney defects cause gout
- Defective gene for URAT1
- High insulin (lowers rate of excretion)
- Diuretics impair uric acid excretion (thiazides)
What diseases can cause gout
- Polycythaemia vera
- Leukaemia
- Surgery
- Psoriasis
- Carcinoma
What conditions does Gout increase incidence of
- CVD
- Hypertension of kidneys
- Diabetes Mellitus II
What FBC content is used to distinguish between polymyalgia rheumatic and myositis
Creatinine kinase levels normal in PR
What people are effected by pseudo gout
- Oteoarthritis
- Obesity
- Haemochromatosis
- Hyperparathyroidism
- Diabetes
- Old Age
What is the problem with isotope bone scans in Paget’s
Unable to distinguish between Paget’s and sclerotic metastatic carcnioma
Where do osteosarcomas metastasise to
the LUNG
Why do we look at creatinine levels for kidney function
Can only be excreted by the kidneys (made by the muscles)
At what eGFR is anaemia seen in
<30
What is the MAP that drives filtration in the Bowman’s capsule
60-70mmHg
What causes Falconi Syndrome
- Cystinosis
- Wilson’s
- Tenofovir
What molecules does angiotensin II upreuglate (polycystic kidney disease)
- TGF-beta
2. PAI-1
If I find eosinophils in my urine, what can this indicate
Cholesterol Emboli or allergic tubulointerstitial nephrotis
When does ADPKD arise
In males - adulthood
CVD effects of anaemia
- Pericarditis
2. Pericardial effusion
What condition is associated with minimal change disease
- Hodgkin’s lymphoma
Clinical Presentation of Lacunar strokes
- Pure sensory loss
- Ataxic hemiparesis
- Unilateral weakness
ONE OF THREE
How long is the time frame for thrombolysis
4.5 hours max
What diseases can predispose you to aneurysms
- Polycystic kidney disease
- Ehlers Danlos Syndrome
- Coarctation of the aorta
What is lipohyalinosis
- Vessel wall thickening causing hypertension
Results in lacunar infarcts and strokes
What causes status epileptics
- Stopping preventative treatment
- Alcohol Abuse
- Poor compliance to therapy
What environmental problems can cause Parkinson’s
- Pesticides
- MPTP - opiates
Causes mitochondrial dysfunction + Oxidative stress
What are lewy-bodies made of
- Alpha synuclein
2. Ubiquitin
In what condition is Propranolol contraindicated
Diabetes Mellitus
Why dow e avoid Bromocriptine and Cabergoline when treating Parkinson’s
Causes cardiac valvulopathy
Side-effect of Mao-B inhibitor
- Postural Hypotension
2. AF
Name two dopamine antagonist
- Oral Ropinirole
2. Oral Pramiprexole
Why do we get rigidity in Parkinson’s
Lesions in the extrapyramidal tract
What conditions can cause dementia
- Alcohol Abuse
- Liver Failure
- Creutzfeldt-Jakob disease
- B12/folate deficiency
- Huntington’s
Describe the anatomy of the cervical ICA
- Posterior and lateral to ECA
- Anterior and medial to internal jugular vein
ANASTOMOSES with basilar artery sometimes
Branches of the petrous ICA
- Caroticotympanic artery
2. Vivian artery connection to ECA
Branches of the cavernous ICA
- Meaning-hypophyseal artery (posterior pituitary)
2. Inferolateral Trunk to ECA
Branches of the supraclinoid ICA
- Ophthalmic artery
- Superior hypophyseal
- Posterior communicating
- Anterior choroidal artery
What does the lateral lenticulostriate artery supply (M1 - middle cerebral artery)
- Lentiform nucleus (putamen and globus pallidus)
- Caudate
- Internal Capsule
What branch of the anterior cerebral artery supplies the corpus callosum
- Recurrent artery of Heubner
What does the posterior inferior cerebellar artery supply
- Medulla
2. Inferior cerebellum
What does the basilar artery supply
Anterior inferior cerbeellar artery: Cerebellum, CN7 + 8
Bilateral superior cerebellar artery
What does the posterior cerebral artery supply
- Thalamus
- Geniculate body
- Cerebral pentacles
- Tectum
Why is ethosuximide only given in petit mal
It only prevents against generalised seizures - not focal and generalised
What drugs only stop against focal seizures
- Carbamazepine
2. Phenytoin
Name the three classes of Calcium-ion channel blockers
- Dihydropyradines
- Phenylamines
- Diphenylalkylamines
How do ACEI work other than their effect on RAAS
Stop degradation of Bradykinin
Increased production of Prostacyclin and NO = Vasodilation
Side-effects of ACEI
- Hyperkalaemia
- Renal Artery Stenosis (due to decreased angiotensin levels)
- —-Applies to ARBs^^—– - Bradykinin-mediated dry cough and angioedema
When is Verapamil contraindicated
Beta-blockers
What type of arrhythmic drug is Quinidine and procaine amide
1a - prolongs QT intveral
When is Quinidine prescribed
- Atrial arythmias, tachycardias and ectopic beats
1A - Atria
Short QT syndrome
Brugada Syndrome
When is lidocaine given
Ventricular arrythmias
Acute MI or Cardioversion
When is Procaineamide given
Ventricular Tachycardia
Ventricular ectopic beats
AF (all supra ventricular arrythmias)
Cardioversion for AF
- Amiodarone or Procainamide
When is Tocainide given (1B)
Reduce chances of secondary heart attack
What class drug is Flecainide
1C
What channel does digoxin inhibit
Na+/K+ ATPase in myocardium
What causes Infective Endocarditis
- IVDU, Diabetes and surgery - S.Aureus
- Dental - S.viridans
- Pseudomonas Aerguinosa
Clinical presentation of Hypertrophic Cardiomyopathy
- Double Apical pulsation (forceful atrial contraction causes fourth heart sound)
- Jerky carotid pulse (rapid ejection + LVOT)
- Ejection systolic murmur (due to LVOT in systole)
Asthma vs COPD in clinical presentation
- Reduced chest expansion in attacks (barrel chest in COPD)
2. Nocturnal cough and symptoms in ASTHMA not COPD
What should be done if asthmatic attack isn’t improving with treatment
CXR for heart failure
What inflammatory mediators are released by cigarettes in COPD
IL-1
IL-8
TNF-alpha
Genetic cause of asthma
ADAM33
What drugs can cause asthma
NSAIDs
Beta-blockers
What condition are patents with silicosis susceptible to
- TB
What asbestos fibres cause asbestosis
- Crocidolite
- Amosite
COMMON - Chrysolite
Complication of Idiopathic Pulmonary Fibrosis
Interstitial Pneumonia
Pulmonary embolism and Pneumothorax
When does pleural effusion cause chest pains
When LYING DOWN
What viruses can cause infective diarrhoea
- Rotavirus
- Adenovirus
- Norovirus
- Astrovirus
Risk factors for Hashimoto’s thyroiditis
CTLA-4 gene mutation
Down Syndrome
What drugs can induce hashimoto’s thyroiditis
- Carbimaxole
- Lithium
- Amiodarone (high iodine content stops T3-T4)
Complications Hashimoto’s thyroiditis
Non-Hodgkin’s Lymphoma
What are askanazy cells
In hypothyroidism: Cells develop eosinophilic granular cytoplasms due to proliferation of mitochondria.
Risks of giving LEVOTHYROXINE
- AF
2. Osteoporosis
What is myxoedema coma
SEVERE HYPOTHYROIDISM
Characterised by lethargy, weakness and confusion
How is myxoedema Coma treated
- IV T3 and Glucose infusion
Four ways hypothyroidism is induced
- Carbimazole
- Lithium
- Amiodarone
- INF
Side-effect of SIADH management
- Central Pontine Myelinolysis
What conditions is Addison’s associated with
- Type I diabetes
- Hashimoto’s thyroiditis
- Coeliac’s
- Vitiligo
Risk Factors for Hashimoto’s Thyroiditis
- Gene mutation in CTLA-4
2. Down’s Syndrome
What infections can cause lymphomas
- HELICOBACTER PYLORI INFECTION
2. EBV
What happens to Hb in renal tubular cells during haemolytic anaemia
Deposited as Haemosiderin into cells
Side-effect of erythropoietin treatment in CDA
- Flu
- Hypertension
- Rise in platelet count
- Thromboembolism
Neurological effects of B12 deficiency
- Paraesthesia of foot and toe
- Ataxia and weakness
- Paraplegia
- Optic atrophy
- Dementia
- Hallucination
Why can’t folate be given without B12
Degeneration of spinal cord
What is heard on a stethoscope in Anaemia
- Systolic flow murmur - due to tachicardia
How is t(9;22) diagnosed
- BCR/ABL dual colour dual-fusion probe
What molecules inhibit osteoblasts
HGF
DKK-1
What indicates a poor prognosis of myeloma
- Reduced serum albumin
- Increased serum betamicroglobulin
- Increased LDH
What compounds activate osteoclasts
- RANK Ligands
2. IL-3
Where is the G6PD gene located
Chromosome Xq28 on factor VIII gene
How does G6PD defend RBCs
Provides NADPH which is used with glutathione to protect from H2O2
What causes oxidative crisis
Reduction in glutathione production
What induces glutathione reduction
- Aspirin
- Antibacterials
- Dapsone
- Quinidine
How is thalassaemia distinguished form iron deficiency
- Blood tests
2. Hb electrophoresis
Complications of thalassaemia treatment
- Iron deposition in liver and spleen = cirrhosis and fibrosis
2 Iron deposition in endocrine glands and heart = diabetes
Genetic mutations that cause SCA
- Single-base mutation of adenine to Thymine which substitutes Valine for Glutamic acid at 6th codon for beta-globin
Genetic cause of polycythaemia Vera
- Point mutation that substitutes phenylalanine for valine at 617th position
What enzyme indicates anaemia
Elevated lactate dehydrogenase
What part of the prostate over proliferates in BPH
- Stroma
2. Glands
Clinical Presentation of WILM’s TUMOUR
- Distended abdomen
2. Haematuria
What layer of the prostate has carcinomas arising from it
Peripheral zone of the prostate
BPH - Transitional
What is Von Hippel Lindau Syndrome
Genetic cause of Renal Cell carcinoma
3q gene mutation - Autosomal Dominant
What genes predispose you to prostatic cancer
- HOXB13
2. BRCA2
Urine biomarker for prostatic cancer
- PCA3
Name some biomarkers for testicular cancer
- Alpha-fetoprotein
2. B-hCG
What antigen increases susceptibility to UTIs
HLA-A3
What microbes secrete urease against the host
GRAM-POSITIVE:
- Klebsiella
- Pseudomonas
- Proteus
GRAM-NEGATIVE:
- Staphylococcus
- Mycoplasma
Three adhesive features of E.coli
- Pilli for ascent
- Aerobactin for Fe acquisition
- Haemolysin - pore formation
Wha virus causes Hep A and how is it excreted
Picornavirus
In bile
What fungi can cause pericarditis
- Histoplasmosis
2. Coccidioplasmosis
What is needed in conjunction with ORAL TENOFOVIR
Renal Monitoring
What virus is HCV
RNA Flavivirus
Hep E virus
RNA
HBV virus
DNA
What is Mirizzi syndrome
Where stone in cystic duct compresses common bile duct
Most common HCV genotypes that infect people
1a and 1b
Replacement of colonoscopy
- Double contrast barium enema
What is used to check for rectal cancer in elderly
- CT colonoscopies
No perforation risk
What would be found in FBC for prosthetic joint infection
Alpha defensins
Symptoms of JIA enthesitis
- IBD
Back pain
Main Side-effect of tamsulosin
Postural Hypotension
What carcinogens increase risk of bladder cancer
- Azo Dyes
2. Beta-Napthylamine
How is the value of concentrtaion-dependant killing calculated
Peak conc. / MIC ratio
Formula for breakpoint conc.
cmax/et x f x s
s = shift factor t = factor to allow for serum elimination half-life e = factor by which cmax should exceed MIC
How to treat candidaisis
Fluconazole
Complications of DKA
- Cerebral oedema
- Adult Respiratory Syndrome
- Thromboembolism
- Aspiration Pneumonia
What is given to a patient before thyroidectomy surgery
Potassium Iodide - reduces vascularity of the thyroid gland
Also discontinue antithyroid
What blood test would indicate hypothyroidism
- Normocytic anaemia
- Raised serum aspartate transferase
- Increased serum creatinine kinase levels
- Hypercholesterolaemia
5, Hyponatraemia
What is belt-clapper deformity
- Where testis is not fixed to scrotum completely (free movement)