Quiz 52, 53 Flashcards
What amino acid is a biological precursor to catecholamines?
Tyrosine
What amino acid is the precursor to nitric oxide?
Arginine
What is the common presentation of ischemic bowel disease?
Usually seen in older patients (F>M), presents with acute or intermittent cramping abdominal pain and bloody diarrhea
What is the most common location of ischemic colitis?
Splenic flexure
What is a common cause of ischemic colitis?
Atherosclerosis, occlusion, hypoperfusion
What type of amyloid accumulates from chronic inflammation?
SAA - serum amyloid A
What are systemic manifestations of AA amyloidosis?
Nephrotic syndrome and organomegaly
Patients with nephrotic syndrome are predisposed to forming thromboses, why?
Decreased antithrombin III and increased fibrinogen
What type of thrombosis is associated with nephrotic syndrome?
Renal vein thrombosis is most common
What is seen on histologic examination of amyloidosis?
Apple-green birefringence with polarization of congo red stain
What cranial nerves emerge from the brainstem at the cerebellopontine angle?
CN VII (facial nerve) and CN VIII (vestibulocochlear)
What is a common causative organism of neonatal conjunctivitis? How is it prevented?
Chlamydia trachomatis; prevented by erythromycin eye drops
Neonatal conjunctivitis followed by pneumonia
C. Trachomatis
What is mycosis fungoides?
A cutaneous T cell lymphoma
What is the appearance of mycosis fungoides?
Itchy, erythematous plaques and nodules
Cytoplasmic inclusions in the epidermal cells is pathognomonic for what?
Molluscum contagiosum
Poarakeratosis, hyperkeratosis, acanthosis is seen in what skin lesions?
Psoriasis
Weak peripheral pulses is associated with what cardiac disease?
Aortic stenosis
Heaves is associated with what cardiac disease?
LVH (heard at apex) or RVH (heard on L side)
Deceased S2 heart sound is associated with what heart disease?
Aortic stenosis
Loud S3 heart sound is associated with what cardiac finding?
Rapid ventricular filling - seen in congestive heart failure
What is the formation of microtubules in cilia/flagella?
9 peripheral pairs and 2 central
What direction does dynein travel along the microtuble, minus or plus end?
Minus end
What type of HSR is contact dermatitis?
Type IV
What tissues is GLUT4 found in?
Cardiac muscle, skeletal muscle, fat
What tissues is GLUT1 found on?
Most tissues; esp brain and red blood cells
Describe GLUT1 response to insulin
No responsive to insulin; tissues therefore take up glucose independently of insulin/plasma glucose levels
Where is GLUT2 found?
Liver, pancreatic beta cells, basolateral surface of small intestine
Where is GLUT3 found?
Most tissues, neurons, placenta and testes
Where is GLUT5 found? What is its function?
Small intestine, testes and sperm; fructose transporter
What type of brain bleed can have symptoms present several days to weeks following a traumatic head injury?
Subacute subdural hematoma
What is the cause of bleeding in subdural hematomas?
Rupture of bridging veins
What is the appearance of subdural hematoma on CT?
Crescentic hematoma
What type of bleed results in “lens-shaped” on CT scan?
Epidural bleeds
What is the cause of bleeding in an epidural hematoma?
Middle meningeal artery
Intraventricular bleed is seen in what type of brain bleed?
Subarachnoid hemorrhage
Rupture of bridging veins results in what type of brain bleed? What is seen on CT?
Subdural hematoma; crescent shape on CT
What brain bleeds cross suture lines? Which do not?
Subdural hematomas cross suture lines; epidural hematomas do NOT cross suture lines
What type of brain bleed is seen with a middle meningeal rupture?
Epidural hematoma
What is a freshwater amoeba that can result in primary amebic meningoencephalitis?
Naegleria fowleri
Young boy presents with loss of smell after swimming in nearby lake, what organism could he be infected with?
Naegleria fowleri
What is seen on examination of CSF in a patient with Naegleria fowleri?
High PMNs, glucose low, protein elevated, CSF pressure high
What is the microscopic appearance of Naegleria fowleri?
Motile flagellated trophozoite
Creating a shunt between the portal system and a vein of the caval system would help relieve what?
Portal hypertension
What does the splenic vein drain into?
Hepatic portal vein
What vein does the left renal vein drain into?
IVC
What is the cause of an aspergilloma?
Growth of Aspergillus fumigatus in preexisting cavitary lesions of the lung (tuberculosis, bronchiectasis)
Appearance of aspergillus fumigatus?
Monomorphic filamentous fungus that shows dichotomous branching of septate, hyphae typically at 45 degrees
How is aspergillus fumigatus treated?
Voriconazole
Radical mastectomy results in loss of muscle?
Pec major
What is the cause of psuedomyxoma peritonei?
Rupture of mucinous cystadeoma or mucinous cystadenocarcinoma
What are the most common type of tumor in the appendix?
Carcinoid
Pearly papules on sun exposed skin is pathognomonic for what?
Basal cell carcinoma
What is seen on pathologic examination of basal cell carcinoma?
Clusters of dark, basal cell-like tumor cells with palisading nuclei at the periphery
What cancer can arise from actinic keratosis?
Squamous cell carcinoma
What is the presentation of staphylococcal scalded skin syndrom in an infant?
Generalized severe erythema and flaccid bullae (+ Nikolsky sign)
Old man presents with bone pain and his hate doesn’t fit. What is on the differential?
Paget disease
What virus may cause Paget disease?
Paramyxovirus - infects osteoclasts
Why can one see high-output cardiac failure in Paget disease?
Increased marrow arteriovenous shunts
What cancer are patients with Paget disease at increased risk for?
Osteosarcoma
What type of reactive T cells (CD8+ T Cells) are seen in mono?
Downey type II cells
What cells are infected by EBV?
B cells via CD21
What shift occurs in the oxygen-hemoglobin dissociation curve due to CO poisoning?
Left shift
What happens to oxygen carrying capacity of the blood with CO poisoning?
Decreased
What is the defense mechanism identification?
Modeling of behavior on another individual; mechanism of reducing pain from separation or loss
What is an error of omission?
Failing to do the right thing
What is error of commission?
Doing something wrong
What enzyme is affected by lead poisoning?
Aminolevulinate dehydratase and ferrochelatase
What is the treatment for lead poisoning?
Chelation with EDTA, dimecaprol, succimer
What type of anemia is seen in lead poisoning?
Microcytic, hypochromic anemia
What does lead compete with in the renal tubules? What does this result in?
Competes with uric acid; results in hyperuricemia
What antibodies are found in CREST syndrome?
Anticentromere antibody
What are the three branches of the celiac artery?
Spenic artery, left gastric artery, common hepatic artery
Distinct inclusions in RBCs seen on peripheral smear after starting course of TMP-SMX?
Heinz bodies due to G6PD def.