Early-stage non-Spitzoid cutaneous melanoma in patients younger than 22 years of age at diagnosis: long-term follow-up and survival analysis.

PURPOSE: We evaluated prognostic factors among young patients with early stage melanoma, with particular attention to survival, recurrence, and development of a second primary melanoma.

METHODS

We retrospectively reviewed patients (age <22 years) with pathologically confirmed in-situ and stage 1 non-Spitzoid melanoma treated at our institution from 1980-2010, assessing demographics, clinical presentation, treatment, disease-specific survival, recurrence-free survival, and probability of developing a second primary melanoma.

RESULTS

One hundred patients with in-situ melanoma (n=16) or stage 1A (n=48) or 1B (n=36) melanoma were identified. Median age was 19.4 years (range, 11.2-21.9), and median follow-up was 7.6 years (range, 0.1-31.7). Median tumor thickness was 0.76 mm (range, 0.23-2.0). No lesions were ulcerated. All patients underwent wide local excision with negative margins, and 21 had a concomitant negative sentinel lymph node biopsy (SLNB). Sixteen patients developed recurrences, and 8 subsequently died of progressive melanoma. There were 2 non-melanoma-related deaths. Endpoints were 20-year overall survival (77.4%), melanoma-specific mortality (20.1%), recurrence rate (34.0%), and probability of developing a second primary melanoma (24.7%). Greater tumor depth and Clark level were associated with worse prognosis, but age, sex, and tumor mitotic rate were not correlated with recurrence or survival.

CONCLUSION

Among younger early-stage melanoma patients, greater lesion depth conferred higher recurrence risk and mortality. Our data did not define the role of sentinel lymph node biopsy in this group.