From UW Flashcards
Histology of chronic bronchitis
Thickened bronchial walls with neutrophilic and lymphocytic infiltrates and mucous gland enlargement w/ increased goblet cells
Histology of allergic asthma
Thick bronchial epithelium, bm and smooth muscle, inflammatory infiltrate (eosinophils and mast cells) and submucosal gland enlargement
Cystic hygroma
Posterior neck mass d/t abnormal lymph outflow
Seen in XO
de novo partial deletion of short arm of chromosome 5 (5p)
cri du chat
Cause of keloids
Excess TGF-beta: fibroblasts into myofibroblasts beyond borders of wound
Excess collagen formation
Immune cells involved in M. tuberculosis granuloma formation
Macrophages engulf, present to CD4: activated to kill -> form Langhans giant cells (nuclei around the periphery)
Anastomosis that protects descending color
Marginal artery from the SMA
Enzyme the breaks down glucose in the beta cell to enter the TCA cycle
Glucokinase
Best option to rapidly increase blood glucose?
IM glucagon
Signs of lead poisoning
Occupational exposure (painter, construction worker) Microcytic anemia, GI (constipation), mental status changes (confusion or decreased concentration)
What does lead inhibit?
aminolevulinate dehydrates and ferrochelatase
Where and when would you see ringed sideroblasts?
D/t precipitation of iron in developing erythrocytes d/t defects in heme synthesis
Seen in none marrow (not peripheral)
Which nerve can you stimulate in obstructive sleep apnea and what does it do?
Hypoglossal nerve: moves tongue forward in increase diameter of airway
Ornithine translocase deficiency
Defective hepatic urea cycle:
unable to convert ammonia (from aa catabolism) into urea; ammonia accumulates
Afib in hx of aortic stenosis
LV hypertrophy d/t AS; dependent on atrial preload to maintain LV filling
When in afib: decreased preload leads to heart failure; will also have acute pulmonary edema
Sensory innervation for anterior 2/3 of tongue?
Taste: chorda tymapni
Sensation: V3
Sensory innervation for posterior 1/3 of tongue?
Glossopharyngeal (IX)
What separates the anterior and posterior tongue?
Terminal sulcus w/ foramen cecum
Motor innervation to the tongue?
Hypoglossal nerve (XII)
Sensory innervation for posterior tongue root?
Vagus (X)
What enzyme deficiency presents similarly to G-6-pd deficiency?
Gltathione reductase
Chronic, unexpected panic attacks
panic disorder (vs GAD)
What quadruple screen change would be seen in FGR?
Decreased estriol
Most common placentation of monozygotic twins with early (1st week) division?
Monochorionic-diamniotic
Most common placentation of monozygotic twins with late (8-12 days) division?
monochorionic - monoamniotic
high fatality rate
Absent CD18 on leukocytes
Leukocyte adhesion deficiency (integrins); leukocytes cant adhere to endothelium for migration into tissues
Skin and mucosal infection, no pus, poor wound healing
Delayed umbilical cord separation
Chronic leukocytosis
Reduced/absent methylene tetrahydrofolate reductase would lead to what?
Impaired ability to convert homocysteine to methionine; increased risk for thrombosis
Standard deviation %?
68/95/99.7
What nerve courses with the superior thyroid artery and vein? Where do they originate?
External branch of superior laryngeal
Superior to thyroid gland/lateral to thyroid cartilage
What muscle does the external branch of the superior laryngeal nerve innervate? When is injury a risk?
Cricothyroid muscle
During Thyroidectomy
What causes prolactinemia w/ antipsychotic use?
Blockade of tuberinfundibular pathway (connects hypothalamus to pituitary gland; tonic inhibitor of prolactin)
How do you test for tichomonas?
Wet mount/saline microscopy
What changes are seen in serum Ca, phosphorus and PTH in osteoporosis?
None
Anti-smooth muscle antibodies?
Autoimmune hepatitis
Anti-histidyl-tRNA is also called? When is it seen?
Anti-Jo
Polyomositis
Histology of acute heart rejection
Dense infiltrate of mononuclear cells composed of T-lymphocytes
Histology of chronic rejection
Scant inflammatory cells and interstitial fibrosis
Chediak-Higashi
AR
Immunodeficient, albinism and neuro defects (nystagmus and neuropathies)
Defect in neutrophil phagosome lysosome fusion (giant cells)
Homocyteinuria
AR error of methionine metabolism
Lens dislocation, marfanoid habits, intellectual disability, thrombus
Treat by giving B6 and restricting methionine
Macrocyclic antibiotic for c. Diff
Fidaxomicin
What change causes decreased renal plasma flow and increase filtration fraction?
Constriction of efferent arteriole
Porphyria cutanea tarda
Uroporphyrinogen decarboxylase deficiency
Photosensitivity: blisters etc
Continuous, machine like murmur
PDA
Which step of the citric acid cycle is inhibited by ethanol?
a-ketoglutarate to succinylcholine -CoA (a-ketoglyarate dehydrogenase complex)
It is thiamine dependent
What value changes when comparing populations of different disease prevalence?
PPV
What type of rash is seen in measles?
macularpapular
What stimulates the adrenal medulla?
Acetycholine
What is the strucutre of MHC class I?
heavy chain and B2-microglobulin
What is the structure of MHC class II?
alpha and beta polypeptide chains
What kind of signaling are Ca sensing receptors?
GCPR
Drug that causes vertical and horizontal nystagmus, MOA of this drug and antidote
PCP; NMDA antagmonist; benzos
Thyroglossal duct cyst presentation and origin
Sore spot on neck that is tender, fluctuant, and midline; made of ectopic tissue
Originates from floor of the primitive pharynx
Sx of mumps
Parotitis and orchitis (if not vaccinated)
Leber hereditary optic neuropathy
Mitochondrial disease
Degeneration of retinal ganglion cells and axons: leads to painless loss of central vision, known as central scotoma
What enzyme does lead inhibit?
δ-Aminolevulinic acid dehydratase and ferrochelotase
Where would an embolism in a patient with non-valvular a-fib most likely come from
The left atrial appendage
What type of gland are sebaceous glands?
Holocrine
What is sorbitol converted to in the retina normally?
Fructose (via sorbitol dehydrogenase)
What molecules use zinc motifs to alter transcription?
Those with IC receptors:
thyroid hormones, steroids, fat-soluble vitamins
(Lipid soluble)
Inheritance of G6PD?
XR
Signs of lead toxicity
Poor, anemia, language regression in a child
How long does depletion of ATP and accumulation of toxins (resulting in loss of contractility) take in the setting ischemia?
60s
Histologic SE fo topical corticosteroid cream therapy?
Dermal atrophy: drying, cracking, tightening
Due to decreased production of EC collagen matrix and GAGs
LE nerve injured when extensive time spent in lateral decubitus position
Common peroneal
contacts the lateral neck of the fibula
Injury to deep peroneal nerve?
Foot drop (anterior compartment muscles used for dorsiflexion)
Injury to superficial peroneal nerve?
Decreased foot eversion
Decreased sensation of lateral leg and dorsolateral foot
Signs of cocaine withdraw
depression, fatigue, hypersomnia, hyperplasia and vivid dreams
Fabry disease
XR; alpha-galactosidase A deficiency: accumulated globotriaosylceramide
Neuropathic pain, decreased sweating, angiokeratomas, telangiectasis, glomerular disease, CV disease
What do amatoxins halt?
(mushrooms)
RNA pol II: blocking mRNA synthesis
What does ricin halt
(toxin from castor oil plant)
Protein synthesis; cleaves rRNA of 60S subunit
What are anti-Smith ab specific for?
snRNA in the cytoplasm (these remove introns from mRNA)
Most common cause of paradoxical embolism?
ASD
incomplete fusion of septum primum and secundum
Glossopharyngeal nerve lesion
(CN IX)
Loss of taste of posterior 1/3, loss of sensation in upper pharynx, posterior tongue, tonsils and middle ear
What is the major determinant of severity in TofF?
RV outflow tract obstruction
Adenomyosis
Endometrial tissue in the myometrium
Heavy bleeding, uniformly enlarged uterus
What is CNX derived from?
4th and 6th pharyngeal arch
Tay-Sachs
AR; B-hexosaminidase A deficiency: build up of GM2 gangliosides
Normal at first: neuro deterioration, weakness, sz, cherry red macula
(NO hepatosplenomegaly)
Rett syndrome
Normal until 5-18m
Loss of motor and language skills
Hand wringing, decreased head growth
XL MECP2 gene (de novo)
Deviation of mandible toward the effected lesion
CN V3
Renal clearance of PAH
Freely filtered into Bowman’s space; majority is secreted by proximal tubule via carrier transport
None is reabsorbed
Cause of annular pancreas
Abnormal migration of ventral pancreatic bud
ADH secretion and storage
Hypothalamus, stored in posterior pituitary
What is the cause of hyper acute transplant rejection?
Preformed antibodies
What blood disorder would you see monoclonal gamma globulin spike?
Multiple myeloma
Congenital hypothyroidism
Lethargy, enlarge fontanelle, protruding tongue, umbilical hernia, poor feeding, constipation, dry skin, jaundice
Primary immune cells seen in COPD
macrophages, CD8 and neutrophils
Which cholesterol drug can cause gout?
niacin
What enzyme is inhibited in riboflavin deficiency?
Succinate dehydrogenase
Hemorrhoids above the dentate line
Internal; drain to the superior rectal vein -> inferior mesenteric vein
Hemorrhoids below the dentate line
External; inferior rectal vein -> internal pudendal vein -> internal iliac veins
Presentation of togavirus
Rubella; maculopapular rash that starts on face and spreads to body
Poastaruicular and occipital lymphadenopathy
What would be seen on light microscopy of a patient with linear deposit seen on IF?
Glomerular crescents
Goodpasture; IgG and C3
Problem in xeroderma pigmentosum
Defective endonuclease nucleotide excision repair
Thymine dimers created by UV light require special UV endonuclease
What allows elastin to stretch and recoil>
Interchain cross-linking involving lysine
What is increased in isolated diastolic heart failure?
LV end-diastolic volume
What yeast is seen in patients with central lines?
Candida (pseudohyphae with blastoconidia)
Where do you get B12?
Only from animal products (vegans at risk)
What part of the eye do Beta blockers effect to treat glaucoma?
Ciliary epithelium
When does non-disjunction usually occur?
During meiosis I
What is the concern in a patient with hyperthyroid and fever/sore throat?
Agranulocytosis (check WBC w/diff)
What enzyme is inhibited by fibrates?
cholesterol 7 alpha-hydroxylase
What immune cells would cause granulomas in sarcoidosis?
Th1, IL-2, IFN-gamma
What would brain imaging in a patient with PKU show?
Pallor of substantia nigra, locus ceruleus, and vagal nucleus dorsalis
Lack of neurophysin would lead to what?
DI
neurophysiology carries oxytocin and ADH from the nuclei to the post pit
What collagen type is fibrotic scar tissue composed of?
Type 1 (similar to dermis, bone, tendon, ligament, blood vessels)
How do you differentiate an ecological study from other types?
Analysis of entire populations; not individuals
What artery would be at risk in a patient with a midshaft humerus injury and radial nerve injury?
Deep brachial artery
Renal papillary necrosis presentation
Abrupt hematuria w/family hx of SCD
CD20 indicates what?
Immature B cells (seen in B cell cancers)
CD40 is used for what?
Isotype switching
Hyper-IgM
XR defect of CD40L Cannot signal to B-cells to class switch
Subclavian steal syndrome
Stenosis of subclavian leads to “steal” of blood from contralateral vertebral artery
Where would a pure sensory stroke be?
In the thalamus (VPL)
Common cause of lacunar infarcts?
Liphyalinosis and microatheromas
lead to liquefactive necrosis
Which bio stats value relies on the prevalence of the disease in the population?
PPV (higher in populations with higher prevalence) and NPV
Thiamine deficiency will lead to decrease activity of what enzyme?
(a bunch, but can be diagnostic if) erythrocyte transketolase (is low and increases w/ thiamine supplement)
Insulin resistance in pregnancy
Due to human placental lactose (secrete by syncytiotrophoblast)
Hypoxemia with normal A-a
Hypoventilation (obesity, NM disorders) or low O2 inspiration (high altitude)
Acute intermittent porphyra
AD; deficiency of porphobilinogen deaminase
GI and neuro sx
Red urine that darkens
Give dextrose to down regulate ALA synthesis
hCG acts like what hormone?
TSH
Embryologic origin of the main pancreatic duct?
Ventral pancreatic primordium
What is deficient in Plummer Vinson?
Iron
HbS mutation?
Valine of glutamic acid
What cells synthesize the fibrous cap in an atheroma?
Smooth muscle cells
Most common amino acid in collagen
Glycine (Gly-X-Y)