Free USMLE USMLE Exam Questions

Which of the following is a disease characterized by hyperactive sebaceous glands and often associated with dandruff?

A 30-year-old Caucasian male with HIV/AIDS develops right-sided weakness involving his right leg. A MRI of his brain reveals multiple ring enhancing lesions within the white matter in his left frontal lobe. The most likely source of this infection in the United States is

The thymus is located with the _______. 

Which of the following is not considered a major branch off of the abdominal aorta? 

A 10-month-old boy is brought to the physician because of a 4-day history of fever and cough. His illness began with low-grade fever and copious, clear nasal discharge. Two days ago he developed a moist, nonproductive cough and rapid breathing. He has received all scheduled childhood immunizations. He attends a large day-care center and has three school-aged siblings. His temperature is 38°C (100.4°F), pulse is 101/min, respirations are 38/min, and blood pressure is 85/60 mmHg. Physical examination shows nasal flaring and rhinorrhea. Chest examination shows intercostal retractions along with bilateral, diffuse wheezes and expiratory rhonchi. The infectious agent of this patient's condition most likely has which of the following properties?