A 25-year-old man presented with diarrhea for 6 months, unintentional 20-pound weight loss, and upper-torso flushing when taking showers. Evaluation of diarrhea was nondiagnostic, including bacterial and parasitic stool cultures, celiac sprue serology, GI endoscopies with biopsies, and abdominal CT scan. Incidentally, CT of the chest revealed diffuse bilateral nodular opacities without adenopathy or pleural abnormalities (Fig 1
). On further questioning, the patient denied cough, dyspnea, hemoptysis, fever, or night sweats.