UWORLD Review Flashcards
What key imaging feature helps distinguish between CNS lymphoma and Progressive Multifocal Leukoencephalopathy (PML)?
MRI in PML shows multiple, asymmetric NON-enhancing demyelinating lesions with NO mass effect.
How can HIV Encephalopathy be distinguished from PLM?
HIV encephalopathy usually presents with Dementia as main symptom not focal neuro findings.
On MRI lesions in HIV encephalopathy are symmetric in their distribution.
What is the leading cause of Hypophosphatemia in ICU pt?
Continuous Glucose Infusion
What is are some complication of Hypophosphatemia in ICU pts?
Failure to be weaned off Ventilator d/t respiratory muscle weakness.
Decreased cardiac contractility
Decreased BPG–> less Oxygen delivery to tissues (dissociation curve shifts left)
What is the proposed mechanism for Calcium Channel Blocker (CCB)-associated edema?
Preferential vasodilation of arteriole–>increased capillary hydrostatic pressure–>increased fluid movement into interstitium
What are main side effects associated with dihydropyridine CCB’s?
Headache
Dizziness
Flushing
Edema
At what anatomic site do ACEi’s work?
Post capillary (efferent) arteriole/venodilation
What is the most common complication associated with Statin use?
Medication-induced Myopathy
What is the treatment for late latent/unknown/gummatous/cardiovascular syphilis?
IM Benzathine Penicillin G weekly for 3 wks
What is the treatment for Neurosyphilis/Congenital
IV Aqueous Penicillin G for 10-14 days
What is the treatment for Primary/Secondary/Early latent (
IM Benzathine Penicillin G single dose
What is the most common complication of Polycythemia Vera?
Myelofibrosis
What type of leukemia are pts with Down Syndrome at increased risk of getting?
ALL
At what platelet count id Prophylactic platelet transfusion indicated?
Plt
What virus is associated with Adult T-cell Lymphoma?
HTLV-1
Endemic in Japan and Caribbean
What is the most common type of Hodgkin Lymphoma?
Nodular Sclerosing
Mixed Cellularity is second most common type
Which chemo drug is assoiciated with causing a reversible cardiotoxicity that affects left ventricular function?
Trastuzumab (Herceptin)
MOA: Causes decreased cardiac myocardial contractility.
What is the most likely diagnosis in a pt with a loud 4/6 holosystolic murmur with thrill at 4th ICS at left sternal border?
Ventricular Septal Defect (VSD)
Note: loud murmur = small restrictive VSD
soft murmur = large nonrestricitve VSD with grater shunting
Waht is the preferred method of imaging the esophagus and stomach?
Traditional Endoscopy
Note: wireless “pill” endoscopy is beneficial for areas of small bowel otherwise, views are limited in the esophagus, stomach, and cecum.
What is the indication for treatment of Paget’s Disease of the Bone?
Wt bearing bone involvement Hypercalcemia/hypercalcuria Intolerable Pain Neuro Involvement CHF
What are the features of Whipple”s Triad?
Low Blood Glucose
Sx of Hypoglycemia
Sx relief with glucose
Suggests true hypoglycemia
What is the most likely dx in a pt who presents with bitemporal hemianopsia, hyperpigmentation, and h/o abdominal adrenalectomy prior.
Nelson Syndrome
What is the best test to dx Nelson Syndrome?
Brain MRI Pituitary microadenoma (suprasellar pituitary enlargement d/t loss of negative feedback inhibition s/p bilateral adrenalectomy)
and
Elevated ACTH
What is the most likely diagnosis in a pt with IBD who c/o several episodes of bloody diarrhea, abdominal pain, fever, weakness, and tympanitic, distended abdomen?
Toxic Megacolon