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12809 Pathology

A 67-year-old man with Parkinson disease has experienced an increasingly dry mouth for the past 3 months, and this interferes with eating and swallowing. He has noted dry eyes as well. On physical examination he has minimal tremor at rest; there are no other abnormal findings. Laboratory studies show no detectable autoantibodies. Which of the following is the most likely cause for his findings?

AAlcohol ingestion
BAnticholinergic drug use
CCandidiasis
DSialadenitis with blockage of salivary duct
Pathology
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12813 Pathology

A 9-year-old girl develops widespread pinpoint skin hemorrhages. She recovered from a flu-like illness 1 week earlier. Laboratory findings reveal a platelet count of 20,000/mL but no other abnormalities. Her bone marrow shows an increased number of megakaryocytes. The platelet count is normal after 2 months. Which of the following is the appropriate diagnosis?

AAntiphospholipid antibody syndrome
BDisseminated intravascular coagulation
CHemolytic-uremic syndrome
DIdiopathic thrombocytopenic purpura
Pathology
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