This document summarizes three cases of hand masses and provides information on common benign and malignant hand tumors. Case I describes a 77-year-old man with a firm mass on his third finger. Case II describes a 55-year-old woman with a cystic mass on her third finger. Case III describes a 43-year-old woman referred for a firm mass on her third finger. The document then reviews common benign tumors like ganglion cysts, giant cell tumors, and epidermal inclusion cysts. It also discusses malignant tumors such as squamous cell carcinoma, basal cell carcinoma, melanoma, and bone tumors including enchondroma and chondrosarcoma. Diagnostic workup and treatment options are provided