sunday randoms Flashcards
naked viruses
papillomavirus, adenovirus, parvovirus, polyomavirus, calicivirus, picornavirus, reovirus, hepevirus
DNA viruses
polyomavirus, papillomavirus, parvovirus, pox virus, herpes virus, hepadnavirus, adenovirus
owl eye intra-nuclear inclusions
CMV
Tzanck smear
HSV
receptors used by HIV viruses
CCR5, CXCR4, CD4
Rhinovirus reveptos
ICAM-1
receptors used by CMV
integrins (heparan sulfate)
receptor used by EBV
CD21
receptor used by Parvovirus B19
P antigen on RBCs
all RNA viruses replicated in cytoplasm except
retrovirus, influenza virus
picornaviruses
RNA PERCH - poliovirus, echovirus, rhinovirus, coxsackie virus, HAV
paramyxoviruses
RNA - parainfluenza, RSV, measles, mumps
flaviviruses
HCV and arbovirus, arthrophod borne (yellow fever, zika, west nile, st. louis encephalitis, dengue)
segmented viruses
BOAR - bunyavirus, orhtomyxovirus, arenavirus, reovirus
which hepatitis viruses have risk for HCC?
HBV, HCV, HDV
MHC class II
primarily APCs - macrophages, DCs and B cells
Quellung reaction
capsule swelling after bacterium is exposed to its capsular antigens - strep pneumo
causes of reactive arthritis
chlamydia, salmonella, shigella, yersinia, campylobacter, clostridium dificeil
HLA that increases chances of reactive arthritis
HLAB27
disseminated gonococcal infections
triad of tenosynovitis, dermatitis, and non-purulent polyarthralgias
causes of prader willi
absence of paternal contribution on 15 either my microdeletions of paternal region or maternal uniparental disomy
HLA DQ2 and DQ8
celiac sprue
anti-gliadin IgA antbodies with transglutaminases at dermal basement membrane
dermatitis herpetiformis in celiac sprue
macrophages with accumulated PAS positive granules
whipple disease
cobbleston mucosa and transmural inflammation
crohn disease
clinical features of PCOS
androgen excess, ovarian dysfunction, insulin resistance, obesity
PCOS treatment
weight loss, combo OCP, metformin
what determines cellular differentiation?
transcription factor milieu within an individual cell; tissue specific TF allow only for the expression of genes that are relvant for a particular cell type
why left varicocele more common?
left testicular vein drains into left renal vein which can easily be impinged by SMA
where is fluid accumulation in a hydrocele?
b/w parietal and visceral layers of the tunica vaginalis
firm painless testicular mass that does not transilluminate
testicular CA
acanthosis nigricans
insulin resistance or obesity, but also malignancy within the GI tract or lungs
clinical features of DiGeorge syndrome
conotruncal cardiac defects (persistent truncus arteriosus, t of F, interrupted aortic arch), abnormal facies, thymic aplasia/hypoplasia (defective T cell-mediated immunity), cleft palate, hypocalcemia (absent parathyroid glands, leads to tetany and seizures)
which phayngeal pouches fail to develop in DiGeorge syndrome
3 and 4
defective CD40L on Th cells, defective class switching
Hyper IgM syndrome
immunodeficiency that leads to NO b cell differentiation
x-linked agammaglobulinemia
sphingomyelinase deficiency
niemann-pick
arylsulfatase A deficiency
metachromatic leukodystrophy
b-hexosaminidase A deficiency
Tay sachs
wrinkled tissue papaer on electron microscopy
accumulation of glycolipid glucocerebroside in lysomsomes of macrophages in Gaucher disease
which two lysosomal storage diseases appear early in life, are fatal, and have cherry red spot on fundoscopic exam
tay sachs and niemann pick
anti-TNF agents
infliximab, etanercept
inhibits Bcr-Abl tyrosine kinase
imatinib
folate antimetabolite that prevents DNA synthesis
methotrexate, targets rapidly dividing cells
fungal infection in HIV patient with CD4 < 200
pneumocystis jiroveci
what would CXR look like with asthma exacerbation?
normal
paired box (PAX)
important for embyrologic specification of certain itssues
mutation in PAX 6
ocular defects (aniridia), PAX gene specific for the eye
TP53
tumor suppressor gene mutated in Li-Fraumeni
HOX genes
encodes transcription factors that guid the pattern of embryo development along the rostro-caudal, limb, and genital axes
mutation HOXA13
hand-foot-gential syndrome
sudden-onset back pain, hematuria, oliguira, high anion gap metabolic acidosis
ethylene glycol
lymphatic drainage from what structures is seen in right supraclavicular node?
mediastinum, lungs, esophagus
lymphatic drainage from what structures in seen in posteriior clavicular nodes?
scalp, neck, skin of arms and pectorals, thorax, cervical and axillary nodes
left supraclavicular nodes (virchow’s node)
drainage from all abdominal viscera, viscera of left hemithorax, all tissuess inferior to the umbiliculs and all left-sided tissues superior to the umbilicus
when may virchow’s node become enlarged?
abdominal malignancies, breast CA, lung CA, and lymphoproliferative disorders
inguinal lymph nodes
lower extremities, lower abdominal wall, genitalia, buttocks
celiac artery
T12; lower esophagus to proximal duodenum, liver, gallbladder, pancreas, spleen
SMA
L1; distal duodenum to proximal 2/3 of transverse colon
IMA
distal 1/3 transverse colon to upper portion of rectum
B12 absorption
bind to IF in stomach, absorbed in distal ileum
Warriors from Germany love Smoking
Warthrin tumor - benign salivary gland tumor with germinal centers typically found in smokers
mucoepidermoid carcinoma
malignant tumor of salivary gland
crohns biopsy
flattening of villi, hyperplasia of crypts, increased intraepithelial lymphocytes
most damage in crohns?
duodenum
tropical sprue location
jejunum and ileum
what is absorbed jejunum?
folic acid
absorbed in ileum?
B12
small bowel cancer
carcinoid tumor; chromogranin stain; secretes serotonin which is metabolized by liver
carcinoid syndrome
secreted serotonin goes into systemic circulation - bronchospasm, diarrhea, flushing, right sided valvular fibrosis
why no left heart involvement in carcinoid syndrome?
MAO exists in lungs so serotonin is converted before able to do bad stuff
pANCA
Churg-Strauss, microscopic polyangitis, ulcerative colitis
what’s the role of ASA in intestinal polyps?
blocks COX and thus prevents cancerous transformation
APC gene chromosome 5
FAP
what to do when diagnosed with FAP?
remove colon and rectum because SUPER high chance to develop CA by age of 40
Peutz Jeghers syndrome
hamartomaous polyps throughout GI tract, hyperpigmentation on lips, mucosa, genital area, AD, increased risk of breast, colorectal and GYN cancer