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A novel PPP2R2A::PRKD1 fusion in a cribriform adenocarcinoma of salivary gland.

Vincent D de JagerSebastiaan A H J de VisscherEd SchuuringJan J DoffLéon C van Kempen
Published in: Genes, chromosomes & cancer (2023)
Cribriform adenocarcinoma of salivary gland (CASG) is a rare, salivary gland tumor. In this report, we describe a case of CASG harboring a novel PPP2R2A::PRKD1 fusion. A 58-year-old female presented with an intraoral mass adjacent to the lower left third molar region. Morphological features at histological examination, immunohistochemical staining (p63+, p40-), and tumor location were indicative of CASG. However, due to the potential focal presence of a biphasic component within the tumor, RNA sequencing was performed to confirm the diagnosis. The subsequently found novel PPP2R2A::PRKD1 fusion adds to the rapidly evolving molecular landscape of salivary gland tumors. Additionally, we report that CASG may show some entrapment of pre-existent salivary gland ducts, which may be misinterpreted as tumor cells with myoepithelial differentiation.
Keyphrases
  • squamous cell carcinoma
  • single cell
  • locally advanced
  • radiation therapy
  • risk assessment
  • flow cytometry
  • rectal cancer