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Cutaneous melanocytic tumor with CRTC1::TRIM11 fusion: a case report.

Rong DuanXiaojuan HeXiaojing MaFengbo HuangXiangrong Hu
Published in: Diagnostic pathology (2024)
CMTCT is a rare tumor characterized by melanocytic differentiation. In this case, the tumor predominantly comprised epithelioid cells with localized nevus cell clusters. The expression of melanocyte markers could easily lead to a misdiagnosis as cutaneous melanoma. However, several distinguishing features were noted: the tumor was not connected to the epidermis, exhibited low cellular heterogeneity and proliferation index, and showed minimal cellular atypia. Additionally, tests for EWSR1 rearrangement (FISH) and BRAF V600E mutation (PCR-ARMS) were negative.This case underscores the importance of a comprehensive diagnostic approach when clinical, microscopic, immunohistochemical, and molecular findings do not align. The presence of nevus cell clusters morphology in the tumor cells enhances our understanding of this disease's histological spectrum and aids in avoiding misdiagnosis or missed diagnosis.
Keyphrases
  • single cell
  • poor prognosis
  • cell therapy
  • induced apoptosis
  • signaling pathway
  • long non coding rna
  • antiretroviral therapy
  • skin cancer