Endocrine Case Report: Diarrhea and Weight Loss

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History of Present Illness:

A patient in their mid-70s with a history of hypothyroidism presents to the hospital with 3 weeks of nausea, vomiting, and diarrhea without blood but with a 30-pound weight loss. Just recently he noticed low-grade fevers up to 100.2 and intermittent mild epigastric pain. He denies any recent antibiotics or recent travel

Vital Signs and Physical Exam:

Vital signs are normal. Physical exam is also normal except for abnormalities noted below in initial diagnostic testing.

Initial Diagnostic Testing:

  • CBC: normal except for WBC = 12.3
  • Chem-7: normal except for Alk Phos 92, other LFT’s normal


What is the most likely diagnosis?