title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 7-1992. A 57-year-old man with a 20-year history of episodic headache, Flushing, hypotension, and occasional syncope.
mesh_terms: D001853:Bone Marrow / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D007946:Leukemia, Mast-Cell / Q000175:diagnosis; D008297:Male; D008407:Mast Cells / Q000473:pathology; D008415:Mastocytosis / Q000150:complications / Q000473:pathology*; D008875:Middle Aged; D011379:Prognosis; D013163:Splenomegaly / Q000209:etiology; D014582:Urticaria Pigmentosa / Q000175:diagnosis