Incidental Discovery of Melanoma Metastasis in the Thenar Compartment: A Case Report

This report details the evaluation and management of a patient who presented with a tumor located in the thenar compartment of the left hand. The mass measured approximately 2 cm along its longest axis and exhibited no clinical signs of malignancy. However, imaging results and histopathological analysis of the biopsy indicated a malignant process, leading to the decision for tumor resection. The unique aspect of this case is the histopathological analysis of the surgical specimen, which revealed the tumor as a metastasis from a melanoma. This diagnosis was unexpected due to the location and clinical characteristics of the tumor. Biopsies of several dermatological lesions in the patient revealed a small lesion on the scalp, which was diagnosed as a localized melanoma.