[Recurrent pilomatricoma on the left eyebrow: case report]

Area of Science:

• Dermatopathology
• Surgical Oncology

Background:

• Pilomatricoma is a common benign skin tumor originating from the pilosebaceous unit, typically presenting in children as an asymptomatic intradermal nodule.
• While generally benign and non-recurrent after complete excision, atypical presentations can occur.

Observation:

• A 26-year-old patient presented with a slow-growing upper left superciliary lesion diagnosed histologically as pilomatricoma.
• Eight months post-excision, a rapid, ulcerated recurrence prompted suspicion of malignancy.
• Repeat surgical excision and histological analysis confirmed the recurrent lesion was also a benign pilomatricoma.

Findings:

• Histological examination confirmed pilomatricoma in both the initial and recurrent lesions.
• Despite rapid, ulcerated recurrence, no malignant features were identified in either surgical specimen.
• The patient remained recurrence-free during a one-year follow-up period.

Implications:

• This case underscores that pilomatricoma can recur, even in adults, and rapid, ulcerated growth may mimic malignancy.
• Complete surgical excision remains the standard treatment, with careful histological evaluation crucial for accurate diagnosis.
• Long-term follow-up may be warranted for patients with recurrent pilomatricoma.