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Pablo León, MD; John M. Daly, MD; Marie Synnestvedt, MS; Delray J. Schultz, MA; David E. Elder, MB, ChB, FRCPA; Wallace H. Clark, Jr, MD

Arch Surg. 1991;126(12):1461-1468.

Abstract
• Controversy exists as to whether microscopic satellites influence prognosis or patterns of progressive disease in patients with clinical stage I melanoma. Fifty patients with clinical stage I melanoma and microscopic satellites were prospectively studied from 1972 to 1984. To allow for complete histopathology assessment, 30 patients with microscopic satellites who were prospectively seen from 1972 to 1979 were matched to a cohort of 77 patients with vertical growth–phase melanoma without microscopic satellites according to six attributes. The matched cohort study showed that the presence of microscopic satellites appeared to be associated with increased local regional cutaneous and regional nodal disease and a significantly decreased actuarial disease-free survival. A Cox multivariate regression analysis that involved 384 patients with vertical growth–phase clinical stage I melanoma showed that the presence of microscopic satellites independently predicted a poorer disease-free survival and overall survival. Therefore, this study demonstrated that the presence of microscopic satellites correlated with a significantly decreased survival.

(Arch Surg. 1991;126:1461-1468)

Author Affiliations
From the Department of Surgery and the Harrison Department of Surgical Research (Drs León and Daly), The Pigmented Lesion Study Group (Drs Daly, Elder, and Clark and Ms Synnestvedt), the Cancer Center (Mr Schultz and Dr Clark), and the Departments of Pathology and Dermatology (Drs Elder and Clark), The University of Pennsylvania School of Medicine, Philadelphia.

Footnotes
Accepted for publication August 4, 1991.

Presented at the 44th Annual Cancer Symposium of the Society of Surgical Oncology, Orlando, Fla, March 25, 1991.

Reprint requests to Fourth Floor Silverstein Pavilion, Hospital of the University of Pennsylvania, Philadelphia, PA 19104 (Dr Daly).

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