Contents: Tumors of the Epidermis: Nevoid basal cell carcinoma syndrome * Fibroepithelioma of Pinkus * Basosquamous carcinoma * Verrucous carcinoma * Sarcomatoid squamous cell carcinoma * Lentigines, Nevi, and Melanoma: Atypical Spitz nevus (tumor) * Halo Spitz nevus * Desmoplastic nevus * Pigmented epithelioid melanocytoma * Animal-type melanoma * Nevoid melanoma * Balloon cell melanoma * Desmoplastic melanoma * Special site melanoma (mucosal, acral) * Tumors of Cutaneous Appendages: Trichoadenoma * Trichoepithelioma and Brooke-Spiegler syndrome * Desmoplastic trichoepithelioma * Trichoblastoma * Tumors of the follicular infundibulum * Tricholemmoma and tricholemmal carcinoma and Cowden syndrome * Pilomatrixoma * Fibrofolliculoma/trichodiscoma and Birt—Hogg-Dubè syndrome * Sebaceous tumors *Syringocystadenoma papilliferum * Hidradenoma * Cylindroma and familial cylindromatosis and Brooke-Spiegler syndrome * Spiradenoma * Mammary and extramammary Paget’s disease * Syringoma * Eccrine poroma and eccrine porocarcinoma * Mesenchymal Tumors: Dermatofibrosarcoma protuberans * Atypical fibroxanthoma * Malignant fibrous histiocytoma (pleomorphic undifferentiated sarcoma) * Other Uncommon Tumors: Merkel cell carcinoma * Kaposi’s sarcoma * Angiosarcoma * Retiform hemangioendothelioma