Fine-needle aspiration cytology of metastatic squamous-cell carcinoma arising in a pilonidal sinus, with literature review

John D. Williamson, Jan F. Silverman, Lorraine Tafra

Research output: Contribution to journalArticlepeer-review

Abstract

Fewer than 50 cases of carcinoma arising in a pilonidal sinus have been reported, with only 5 patients having documented inguinal lymph node metastases. This is the first report of the fine-needle aspiration (FNA) diagnosis of this uncommon clinical situation of squamous-cell carcinoma arising in a pilonidal sinus, metastatic to an inguinal, lymph node. We report on a 59-yr-old male with squamous-cell carcinoma arising in a pilonidal sinus who presented with inguinal adenopathy. FNA biopsy of a lymph node was performed, resulting in a diagnosis of metastatic squamous-cell carcinoma. FNA biopsy is useful in the evaluation of patients with inguinal adenopathy and a history of malignancy arising in a pilonidal sinus. The possibility of this rare complication should also be considered when metastatic squamous-cell carcinoma to an inguinal lymph node is diagnosed by FNA cytology in patients having an unknown primary except for a change in a long-standing pilonidal cyst.

Original languageEnglish (US)
Pages (from-to)367-370
Number of pages4
JournalDiagnostic cytopathology
Volume20
Issue number6
DOIs
StatePublished - Jun 1999

Keywords

  • Cytology
  • Fine-needle aspiration biopsy
  • Inguinal lymph node
  • Metastasis
  • Pilonidal sinus
  • Squamous-cell carcinoma

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

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