Basosquamous Carcinoma: A Rare Entity With an Atypical Presentation

Area of Science:

• Dermatology
• Oncology
• Pathology

Background:

• Basosquamous carcinoma (BSC) is an uncommon neoplasm, nosologically positioned between basal cell carcinoma and squamous cell carcinoma.
• BSC exhibits histological features of both basal cell carcinoma and squamous cell carcinoma.
• The rarity of BSC necessitates case reports to understand its clinical behavior and management.

Observation:

• This report details a rare case of basosquamous carcinoma (BSC) presenting with unusual topography on the pulp of the left fifth finger.
• Clinical presentation and diagnostic workup were performed for the observed BSC.
• Histological examination was crucial in confirming the diagnosis of basosquamous carcinoma.

Findings:

• Histological examination confirmed the diagnosis of basosquamous carcinoma.
• Staging investigations, including locoregional and general extension studies, were negative, indicating no distant metastasis.
• The patient's condition was managed effectively through surgical resection.

Implications:

• This case highlights the importance of considering rare diagnoses like basosquamous carcinoma, even with atypical presentations.
• Surgical resection appears to be an effective management strategy for localized basosquamous carcinoma.
• Further case reports are needed to build a comprehensive understanding of basosquamous carcinoma epidemiology and treatment outcomes.