Amyloidoma of Stomach: A Case Report.

OBJECTIVE: Amyloidomas are tumor-like deposits of amyloid. Amyloidoma of the gastrointestinal tract is rare. To the best of our knowledge, this is the first instance of diagnosis of an amyloidoma in the gastrointestinal tract by fine needle aspiration (FNA).

STUDY DESIGN: We report a case of a 64-year-old male with a history of ulcerative colitis and primary sclerosing cholangitis who was incidentally found to have a mass in the stomach wall.

RESULTS: Initially thought to be gastrointestinal stromal tumor, FNA demonstrated the lesion to be amyloidoma with a prominent giant cell reaction. This was further confirmed by mass spectrometry. This is the only case report of diagnosis of a gastric amyloidoma by FNA.

CONCLUSION: The presence of a florid giant cell reaction in the absence of ulceration or an inflammatory or neoplastic lesion should alert the pathologist to the possibility of an amyloidoma. This is the only case report of diagnosis of a gastric amyloidoma by FNA.