Ectopic cervical thymoma: a report of two cases of a rare entity frequently misdiagnosed on fine needle aspiration cytology and frozen section.

@article{Yan2010EctopicCT,
  title={Ectopic cervical thymoma: a report of two cases of a rare entity frequently misdiagnosed on fine needle aspiration cytology and frozen section.},
  author={Benedict Junrong Yan and Diana Gkeok-Stzuan Lim and Fredrik B Petersson},
  journal={Head and neck pathology},
  year={2010},
  volume={4 2},
  pages={152-6}
}
Ectopic cervical thymoma (ECT) is a rare tumor that is frequently misdiagnosed on fine needle aspiration cytology and frozen section. Using conventional light microscopy and immunohistochemistry, we characterized the only two cases of ECT found in our institutional files over a period of 20 years. Both tumors were classified as type AB-thymoma. Neoplastic cells expressed cytokeratins but not CD5. Non-neoplastic T-lymphocytes were positive for CD3 and CD5. Lymphocytes expressed CD1a in only one… CONTINUE READING
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