Primary squamous cell carcinoma of the pilonidal area

Area of Science:

• Dermatology
• Oncology
• Surgical Pathology

Background:

• Pilonidal areas are typically associated with benign conditions.
• Malignant transformation in this region is exceptionally rare.
• Primary squamous cell carcinoma (SCC) in the pilonidal area lacks extensive prior documentation.

Observation:

• Two elderly patients presented with primary squamous cell carcinoma (SCC) in the pilonidal area.
• Neither patient had a history of chronic infection or pre-existing lesions known to predispose to malignancy.
• The clinical presentation mimicked typical benign pilonidal disease initially.

Findings:

• Histopathological examination confirmed primary squamous cell carcinoma (SCC) in both cases.
• No evidence of chronic inflammation or Marjolin's ulcer was identified.
• The tumors were distinct from secondary malignancies or metastatic disease.

Implications:

• Physicians and surgeons must consider SCC in the differential diagnosis of pilonidal area lesions, especially in older adults.
• Prompt biopsy is essential for accurate diagnosis and timely intervention.
• Complete surgical excision represents the primary curative treatment modality for this rare malignancy.