A patient develops fever, shortness of breath, and appears to be quite ill. X-ray demonstrates bilateral interstitial lung infiltrates. Bronchial washings demonstrate small 'hat-shape' organisms visible on silver stain within alveoli. Which predisposing condition is most likely to be present in this patient?
Researchers are assessing the specificity
of a screening procedure for breast cancer in a population of 3000 women
whose mothers had the disease. The presence or absence of a malignant
condition is established by conventional mammography, which is assumed to be
definitive for the purposes of comparison. The following data are
collected:
A 33-year-old single mother of two young children visits her physician because of an oral ulcer. A review of systems is significant for fatigue, myalgia, and joint pain. Laboratory results demonstrate leukopenia, and a high-titered antinuclear antibody. A speckled staining pattern due to anti-Sm is seen with immunofluorescence; urinary protein is elevated. Which of the following is the most likely diagnosis?
A 70-year-old woman with a history of multiple small strokes reports to her physician that she has had multiple recent experiences that something or someone seemed very familiar, when in reality they were not familiar to her. This type of experience is called which of the following?
Careful testing of the visual fields in a patient complaining of difficulty reading demonstrates a central scotoma involving one visual field. This defect is most likely due to a lesion involving which of the following structures?
A 15-year-old boy is evaluated by a clinician for failure to develop norma l 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?
A patient who has suffered severe chest trauma in an automobile accident is found to have fluid in the right pleural space. A thoracentesis reveals the presence of chylous fluid in the pleural space, suggesting a rupture of the thoracic duct. In which regions of the thorax is the thoracic duct found?
A 66-year-old male presents with chronic fatigue. On examination, the patient is noted to have lymphadenopathy and an enlarged liver and spleen. Laboratory examination reveals a white blood cell count of 25,000/mL with 93% lymphocytes; the lymphocytes appear small and mature. Both the hematocrit and platelet counts are within normal limits; however, hypogammaglobulinemia is also noted. Which of the following agents is indicated for treatment of this patient's condition?
The smooth part of the right atrium derives from which of the following embryonic structures?
A 48-year-old white female secretary presents with progressive difficulty typing over the past month. She also notes that her hands begin to feel numb and weak after typing for long periods of time. Upon testing, which of the following deficits would be predicted?