Consistent LEF-1 and MYB Immunohistochemical Expression in Human Papillomavirus-Related Multiphenotypic Sinonasal Carcinoma: A Potential Diagnostic Pitfall

Akeesha A. Shah, Bahram Robert Oliai, Justin A. Bishop

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Human papillomavirus (HPV)-related multiphenotypic sinonasal carcinoma (HMSC) is a distinct, newly-described sinonasal tract neoplasm characterized by a salivary gland tumor-like appearance with myoepithelial and ductal cells, frequent surface squamous dysplasia, and relatively indolent behavior. When considering a diagnosis of HMSC, aggressive high-grade salivary gland carcinomas, particularly those with a basaloid morphology such as basal cell adenocarcinoma and adenoid cystic carcinoma, enter the differential diagnosis. The full morphologic and immunophenotypic profile of HMSC continues to be unraveled. In this series of ten cases, we demonstrate that this tumor has consistent, strong immunohistochemical expression of LEF-1 yet lacks nuclear expression of β-catenin, and also has consistent yet variable expression of MYB protein. While LEF-1 expression may be a useful diagnostic adjunct, it can also be a pitfall, as other salivary tumors such as basal cell adenocarcinoma have been previously shown to express LEF-1. Additionally, MYB protein expression is not a discriminatory marker when trying to separate HMSC from adenoid cystic carcinoma.

Original languageEnglish (US)
JournalHead and Neck Pathology
DOIs
Publication statusAccepted/In press - Jan 1 2018

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Keywords

  • Adenoid cystic carcinoma
  • Carcinoma with adenoid cystic-like features
  • Human papillomavirus
  • LEF-1
  • Multiphenotypic sinonasal carcinoma
  • MYB

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Otorhinolaryngology
  • Oncology

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