Approaches to the diagnosis of secretory carcinoma of the salivary glands: a case series and review

Gen Dent. 2023 Mar-Apr;71(2):23-27.

Abstract

Secretory carcinoma (SC) is a salivary gland neoplasm included in the latest World Health Organization Classification of Head and Neck Tumours. Its morphologic and immunohistochemical characteristics resemble those of breast secretory carcinoma, and the tumors share the same fusion gene, ETV6::NTRK3. This chromosome translocation can be confirmed through reverse transcription-polymerase chain reaction or located using ETV6 fluorescent in situ hybridization. These techniques are expensive, and few laboratories can carry out molecular analysis. In addition, some of these tumors are related to non-NTRK fusion types and non-ETV6 translocation. Therefore, recognition of the typical histopathologic features of SC is the first step in considering this disease among the diagnostic hypotheses. In this case series, morphologic findings combined with immunohistochemical profiles were sufficient to make the correct diagnosis.

Keywords: diagnosis; mammary analog secretory carcinoma; salivary gland neoplasms; secretory carcinoma.

MeSH terms

  • Carcinoma* / pathology
  • Humans
  • In Situ Hybridization, Fluorescence
  • Oncogene Proteins, Fusion / genetics
  • Salivary Gland Neoplasms* / genetics
  • Salivary Gland Neoplasms* / pathology
  • Salivary Glands / pathology

Substances

  • Oncogene Proteins, Fusion

Supplementary concepts

  • Secretory breast carcinoma