A 7-year-old patient presents with a mass in the anterior midline of the neck, slightly above the larynx. The mass is mobile and elevates upon protrusion of the tongue. This mass is most likely a cyst that developed from which of the following embryonic structures?
A patient develops a swollen and tender lymph node in his popliteal fossa. An infected skin lesion in which of the following sites would most likely induce lymphadenopathy in this region?
An elderly man comes to medical attention because of anemia and multiple infections. Physical examination is remarkable for hepatosplenomegaly. An automated blood count demonstrates pancytopenia. Review of the peripheral smear by a hematologist demonstrates rare, distinctive, neoplastic white cells covered by fine, hairlike projections. Which of the following characteristics would likely be associated with these cells?
A 50-year-old physician is recovering from aseptic meningitis that began two weeks ago. He appears to have lost considerable cognitive function, and he says he will not go on living if his cognitive ability remains compromised. To demonstrate to him that recovery is occurring, serial evaluations with which of the following psychological assessments is indicated?
A 37-year-old woman is abducted, beaten, and repeatedly raped. For five months after the attack she is nervous, tearful, easily fatigued, and has difficulty concentrating. She also notes difficulty sleeping and lack of appetite, and is hyperreactive to unexpected or loud stimuli. By six months she has returned to her characteristic pre-attack behavioral patterns. Which of the following is the most likely diagnosis?
A patient, who appears to be female, is found to be 46,XY. The patient's vagina is very shallow, ending in a blind pouch, and there are palpable masses in the labia. The diagnosis of testicular feminization syndrome is made. Which of the following was most likely present during the early fetal life of this individual?
A 67-year-old black man with a history of glucose-6-phosphate dehydrogenase (G-6-PD) deficiency presents with fever, irritative voiding symptoms, and perineal pain. Rectal examination is remarkable for a boggy, exquisitely tender prostate. A urine Gram's stain is positive for gram-negative rods. The risk for development of hemolytic anemia is highest if he receives high-dose, 21-day therapy with
A patient develops a form of lung cancer that spreads to occlude the thoracic duct. Edema involving which of the following sites might be expected as a potential complication?
A patient develops an acute febrile illness with shivers, nonproductive cough, and pleuritic chest pain. Five days later, he presents to the emergency room after abruptly having 'coughed up' nearly a cup of blood-stained sputum. Which of the following is most likely to be seen on chest x-ray?
A 15-year-old boy is evaluated by a clinician for failure to develop normal male secondary sexual characteristics. Physical examination reveals small testes, a small penis, and gynecomastia. The boy has had some difficulties in school, and the parents say that the school psychometrist said he had an IQ of 90. This patient's condition is most likely to be related to which of the following?