Free Questions and Answers for All Medical Students all over the World
A daily contest for USMLE students and medical doctors. You post your answer in the comments box. The correct answer and explanation will be posted on the next day. A drawing on the correct answers will be made after 24 hours. The winner will earn a copy of the book “Repeated USMLE Questions for Step 1”. By Dr Ray Makar.
Q- A 30-year-old man presents to the clinic complaining of recurrent bouts of diarrhea accompanied by bloating over the past few years. He also reports having itchy vesicles around the extensor surfaces of his upper and lower extremities. The rest of the clinical examination is normal. What is the skin condition most likely present in … Read more
Q- A 2-year-old boy is brought to the emergency room by his mother. She tells you that her boy has been crying since she picked him up yesterday from the daycare. She thinks that he has abdominal pain. He vomited twice, and he didn’t want to eat breakfast. There is no history of fever, rashes, … Read more
A 62-year-old man presents to the clinic with rashes all over his body and painful joints. Last month, he was diagnosed with arrhythmia. He is taking one medication for it. Laboratory tests reveal anti-histone antibodies. Which of the following drugs is most likely responsible for this condition? A-Hydralazine B-Metoprolol C-Propranolol D-Sotalol E-Verapamil Answer syndr Hydralazine … Read more
Workers in the aniline dye industry are more susceptible to bladder cancer than general population. Meanwhile, studies show that animals, when exposed to beta-naphthylamine develop liver cancer but not bladder cancer. What is the most likely explanation of this finding? A-Metabolism of beta-naphthylamine by human cytochrome 450 system in the liver B-Detoxification of beta-naphthylamine by … Read more
A 57-year-old man with a history of bleeding per rectum visits his physician to discuss the results of his recent CT colpography test. The test was positive for the presence of a colorectal polyp. The sensitivity and specificity of this test to detect a colorectal polyp is 75% and 90% respectively. What is the probability … Read more
A 40-year-old man with a long history of intravenous drug addiction presents to the emergency room complaining of fever, anorexia, malaise, shortness of breath, cough and chest pain for 2 days. On physical examination, temperature is 102.7 F, Pulse is 110/min. and blood pressure is 110/66. Irregular erythematous nodules are seen on his hands and … Read more