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Ectopic hamartomatous thymoma. Report of a case with fine needle aspiration biopsy findings
M Hirokawa1, Y Tadaoka, M Shimizu
1Department of Pathology, Kawasaki Medical School, Kurashiki, Japan. hirokawa@med.kawasaki-m.ac.jp
Background:
Ectopic hamartomatous thymoma is a rare, benign tumor occurring exclusively in the supraclavicular and suprasternal regions. To the best of our knowledge, there are no English-language reports on its cytologic findings.
Case:
A fine needle aspiration specimen from a mass in the suprasternal region in a 63-year-old male revealed epithelial cell nests, spindle cells, a cluster of mature adipocytes and a small number of lymphocytes.
Conclusion:
Although ectopic hamartomatous thymoma is very rare, fine needle aspiration cytology may contribute to the correct diagnosis in conjunction with the characteristic clinical findings.