Desmoid Fibromatosis With TP53 Mutation and Striking Nuclear Pleomorphism

Area of Science:

• Oncology
• Genetics
• Pathology

Background:

• Desmoid fibromatosis is a myofibroblastic neoplasm with intermediate biologic potential.
• It is characterized by local recurrence but lacks metastatic potential.
• Typical desmoid fibromatosis exhibits uniform spindle cells with CTNNB1 or APC gene mutations.

Purpose of the Study:

• To report a unique case of desmoid fibromatosis with significant nuclear pleomorphism.
• To investigate the underlying genetic cause of the observed pleomorphism.
• To explore the association between TP53 mutations and desmoid fibromatosis.

Main Methods:

• Histopathological examination of the tumor.
• Immunohistochemistry for p53 protein expression.
• Molecular testing to identify genetic mutations.

Main Results:

• The desmoid fibromatosis case presented with striking nuclear pleomorphism.
• Strong and diffuse p53 staining was observed via immunohistochemistry.
• Molecular testing confirmed a germline TP53 mutation.

Conclusions:

• The presence of nuclear pleomorphism in desmoid fibromatosis associated with a germline TP53 mutation is a novel finding.
• This suggests a potential role for TP53 mutations in the pathogenesis of atypical desmoid fibromatosis.
• Further research is warranted to understand the implications of TP53 mutations in desmoid fibromatosis.