This patient presents with a recurrent pigmented, erosive lesion at a site of prior skin cancer treatment — a presentation that requires immediate dermoscopy evaluation and same-day biopsy. The lesion demonstrates irregular pigmentation, surface erosion, and surrounding erythema on a background of diffuse solar damage consistent with a prior BCC or SCC treatment site. Any change at a previously treated skin cancer site is a recurrence until the biopsy says otherwise.

Recurrent skin cancers are more challenging to treat than primary lesions — scar tissue from the prior treatment alters the tissue planes, may conceal the extent of tumor invasion, and creates a less predictable surgical field. Recurrent BCC in particular is associated with a higher rate of incomplete excision and subsequent re-recurrence than primary BCC. Dr. Sierro evaluates every recurrent skin cancer with dermoscopy and selects the management strategy — re-excision, Mohs coordination, or systemic therapy — based on the histological findings and clinical context.

Same-day excisional biopsy was performed under local anesthesia during this patient's evaluation visit. The specimen was immediately sent to dermatopathology for margin assessment and subtype characterization. For recurrent lesions, histological subtype is critical: recurrent morpheaform BCC and recurrent perineural SCC carry substantially higher re-recurrence risk and require referral for Mohs surgery rather than standard excision. Dr. Sierro communicates results within days and coordinates the definitive treatment plan.