Squamous cell carcinoma with enteric adenocarcinomatous differentiation

Area of Science:

• Dermatopathology
• Oncology
• Cancer Biology

Background:

• Primary cutaneous squamous cell carcinoma (SCC) is a common skin malignancy.
• Understanding the diverse differentiation pathways of SCC is crucial for accurate diagnosis and treatment.
• Phenotypic plasticity in cancer refers to the ability of tumor cells to alter their characteristics.

Observation:

• A unique case of primary cutaneous squamous cell carcinoma was identified.
• The tumor displayed intermixed enteric-type adenocarcinomatous dedifferentiation.
• A minor component of undifferentiated mesenchymal differentiation was also observed.

Findings:

• This represents the first documented instance of enteric-type adenocarcinomatous dedifferentiation within a cutaneous SCC.
• The co-occurrence of glandular and mesenchymal differentiation in SCC demonstrates remarkable cellular plasticity.
• Histopathological analysis revealed complex tumor morphology.

Implications:

• This case expands the known spectrum of differentiation in cutaneous SCC.
• It suggests that cutaneous SCC may possess a broader potential for phenotypic plasticity than previously recognized.
• Further research is warranted to explore the mechanisms driving this plasticity and its clinical significance.