Screening and Intervention for Skin Cancer in the Galapagos

This study aimed to assess the general dermatological needs and correlation of tentative skin cancer screening diagnoses with histopathological confirmation in the highly sun-exposed locals of the Galapagos Islands.

An institutional review board-approved prospective study was performed at Blanca's House, a nonprofit surgical volunteer organization, free clinics in the Galapagos. After consent, a 40-item modified SPOTme-inspired questionnaire was completed. Partial or total body skin examinations were conducted by board-certified dermatologists. Board-certified plastic and general surgeons performed excisional biopsies on suspicious lesions. Individuals younger than 18 years, and non-Spanish or non-English speakers were excluded.

A total of 273 patients were included in the study, of which 202 reported skin concerns. Benign nevi (n = 76), seborrheic keratosis (n = 42), melasma (n = 19), actinic keratosis (n = 16), acne (n = 15), eczema (n = 13), fungal infections (n = 12), seborrheic dermatitis (n = 5), and psoriasis (n = 5) were most commonly identified.Twelve patients (4.4%) had presumptive skin cancer after screening. Six of 8 biopsies confirmed cancer (group 1), 2 declined a biopsy and 2 were unresectable. Seven basal cell carcinomas and one squamous cell carcinoma were excised with clear margins. A right lower eyelid melanoma was diagnosed and subsequently treated in the United States where invasive melanoma with a Breslow thickness of 0.3 mm was found.Compared with the noncancer group (group 2: n = 265), group 1 had significantly higher likelihood of reporting having seen a dermatologist (P = 0.02), taking any medications (P = 0.0001), having blonde or red hair (P = 0.01), having blue or green eyes (P < 0.0001), and having used indoor tanning equipment (P < 0.0001). Group 1 was also more likely to report 4 or more blistering sunburns (P = 0.08), which approached significance. When evaluated by a dermatologist, group 1 was significantly more likely to be classified as "high risk" for developing cancerous lesions (P < 0.0001) compared with group 2.

Skin concerns in the Galapagos included benign and malignant conditions. There is a need for dermatological care in this medically underserved population. This modified SPOTme-inspired skin cancer questionnaire, confirmed by histology, is a useful tool in identifying high-risk patients and detecting skin cancer in international communities that would have otherwise experienced delays in diagnosis or treatment.