ECG 07 : Thirty-one year old gentleman who recently underwent a right upper lung wedge resection for a necrotic granuloma
ECG 04 : Fifty-four year old woman with a history of metastatic malignant melanoma who is being evaluated for a subsequent course of chemotherapy.
USMLE step 1 : Q 35-37 :Answers
Question Number 35 Correct Answer: B Explanation: Chronologic Bias arises in this study since the author is comparing early and delayed repair of Ebstein's anomaly and assigned infants with such anomalies to either early childhood or adult repairs but is ignoring the fact that surgical facilities and resources would have changed substantially in twenty years. The concurrent comparison of control and experimentally treated...
8:55 AM 0
USMLE step 1 : Q 32-34 :Answers
Question Number 32 Correct Answer: A Explanation: Recall bias is especially important when the investigator has to rely on patient recollection to establish risk factors. The authors used in this study are relying on recalled age of menstruation. An eighty year old is much less likely to accurately remember the age of her first menstruation than a thirty year old. It is also well known that people with a disease are...
6:56 PM 0
USMLE step 1 :: Q 29-31 :Answers
Question Number 29 Correct Answer: D Explanation: The history is strongly suggestive of posterior urethral valves . The neonates who are not recognized at birth most commonly present within a few weeks with urosepsis, dehydration, and electrolyte abnormalities In the male neonate, posterior urethral valves are suspected when there is a palpably distended bladder and the urinary stream is weak. If the obstruction is...
6:41 AM 0
USMLE step 1 : Q 26-28 : Answers
Question Number 26 Correct Answer: A Explanation: A urethral stricture occurs when scar tissue forms in the urethra. The stricture blocks the urethra and may cause the urinary stream to slow to the point where the patient cannot urinate. Causes for urethral stricture formation include trauma ( sharp blow to the base of the penis), gonorrhea, or previous instrumentation of the urinary tract On questioning, the patient...
9:37 PM 0
MRCP Part 1 : Q4-6 : Answers
Question Number 4 Correct Answer: B Explanation: Deficiency of B2 is usually found in conjunction with deficiencies of other B vitamins. Isolated deficiency of riboflavin classically produces inflammation of the nasopharyngeal mucosa, cheilosis, angular stomatitis, glossitis, seborrheic dermatitis, and a normochromic, normocytic anemia. Question Number 5 Correct Answer: D Explanation: Manifestations...
4:52 AM 0
USMLE step 1 : 23-24 Answers
Question Number 23 Correct Answer: A Explanation: The clinical features are typical of facial nerve paralysis. Muscles of the lower half of the face are typically weakened. The normal folds and lines around the lips, nose, and forehead are ironed out, and the palpebral fissure is wider than normal. When the patient attempts to smile, the lower facial muscles are pulled to the opposite side. This distortion of the facial...
1:58 AM 0
USMLE step 1 :20-22:Answers
Question Number 20 Correct Answer: D Explanation: While the above the above clinical features are suggestive of systemic lupus the presence of positive antinuclear antibody (ANA) in the absence of a better diagnosis often represents the most practical way to make a clinical diagnosis. In patients with signs of nephritis (e.g. edema, oliguria, hypertension, dysmorphic RBCs/RBC casts, or significant proteinuria) a prompt...
7:06 PM 0
Q 11-13 : Answers
Question Number 11 Correct Answer: E Explanation: The finding of a a non-compressible superficial superficial femoral vein is indicative of thrombosis of this vein which is the major vein draining the lower limb. Once a diagnosis of Deep vein thrombosis has been made by venography or ultrasonography , baseline CBC, PTT, and INR levels should be obtained. Heparin should be administered Warfarin should be started on the evening...
10:02 AM 0
Q 17-19 Answers
Question Number 17 Correct Answer: C Explanation: Acute leukemias are commoner in Down's syndrome. Experienced morphologists can reproducibly classify about 70% of acute leukemias as either ALL or AML by the blast appearance on Romanovsky-stained smears based on nuclear and cytoplasmic features. The most important morphologic characteristic in identifying blasts is the nuclear chromatin pattern. The chromatin in lymphoblasts...
9:48 AM 0
Answers : Q 14-16
Answer : Question Number 14 Correct Answer: B Explanation: In pregnancy venostasis is a most controllable factor in preventing venous thrombosis and pulmonary embolism. Pregnant women are susceptible to venostasis in the lower extremities, because the gravid uterus interrupts flow through the iliac veins and inferior vena cava. The primary means of alleviating venostasis is elastic compression of the legs. Elastic...
9:08 AM 0
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