Rare Malignant Skin Tumors

Franco Rongioletti, MD University of Genoa Professor of Dermatology Department of Health Sciences, DISSAL Consultant in Dermatopathology Pathology Division IRCSS-AOU S. Martino-IST Genova, Italy   Irina Margaritescu, MD, DipRCPath Dermatologist and Dermatopathologist Onco Team Diagnostic, Anatomic Pathology Laboratory, Monza Hospital Department of Dermatology, Medcenter Medical Center Bucharest, Romania   Bruce R. Smoller, MD Executive Vice President United States & Canadian Academy of Pathology 3643 Walton Way Extension Building 6 Augusta, Georgia 30909

Adenoid (Acantholytic) Squamous Cell Carcinoma.- Clear cell and signet ring cell squamous carcinoma.- Squamous cell carcinoma with mucinous metaplasia.- Adenosquamous cell carcinoma.- Mucoepidermoid carcinoma.- Carcinosarcoma.- Lymphoepithelioma-like carcinoma.- Fibroepithelioma of Pinkus.- Basal Cell Carcinoma with Matrical Differentiation.- Trichoblastic Carcinoma.- Malignant proliferating trichilemmal tumor.- Trichilemmal carcinoma.- Pilomatrix carcinoma.- Sebaceous gland carcinoma.- Primary cutaneous apocrine adenocarcinoma.- Extramammary Paget’s Disease.- Primary Cutaneous Adenoid Cystic Carcinoma.- Malignant mixed tumor of skin.- Hidradenocarcinoma.- Malignant cylindroma.- Malignant Eccrine Spiradenoma.- Microcystic adnexal carcinoma.- Syringoid Eccrine Carcinoma.- Digital papillary adenocarcinoma.- Porocarcinoma.- Signet-ring cell carcinoma of the eyelid/Histiocytoid variant of eccrine sweat gland carcinoma of the eyelid.- Primary mucinous carcinoma of the skin.- Endocrine mucin-producing sweat gland carcinoma.- Low-Grade Fibromyxoid Sarcoma.- Myxofibrosarcoma.- Fibrosarcoma.- Dermatofibrosarcoma protuberans.- Malignant fibrous histiocytoma(pleomorphic undifferentiated sarcoma).- Epithelioid sarcoma.- Composite Hemangioendothelioma.- Epithelioid hemangioendothelioma.- Kaposiform Hemangioendothelioma.- Retiform Hemangioendothelioma.-  Pseudomyogenic Hemangioendothelioma.- Spindle cell liposarcoma.- Myxoid liposarcoma.- Cutaneous Leiomyosarcoma.- Primary Cutaneous Rhabdomyosarcoma.- Malignant rhabdoid tumour.- Primary cutaneous extraskeletal osteosarcoma.- Desmoplastic melanoma.- Signet Ring Cell Melanoma.- Myxoid melanoma.- Rhabdoid melanoma.- Balloon cell melanoma.- Minimal Deviation Melanoma/Nevoid Melanoma.- Spitzoid melanoma.- Nested melanoma of the elderly.- Malignant blue nevus.- Clear cell sarcoma of soft tissue (Malignant melanoma of soft tissue).- Merkel cell carcinoma.- Primary cutaneous Ewing sarcoma/primitive neuroectodermal tumor.-Malignant Peripheral Nerve Sheath Tumor.- Rare Variants of Mycosis Fungoides: Folliculotropic Mycosis.- Rare Variants of Mycosis Fungoides: Granulomatous slack skin variant of mycosis fungoides.-  Rare Variants of Mycosis Fungoides: Localized pagetoid reticulosis (Woringer-Kolopp type).- Rare Variants of Mycosis Fungoides: Syringotropic mycosis fungoides.- Adult T-cell lymphoma/leukemia.- Subcutaneous panniculitis-like T-cell lymphoma.- Extranodal NK/T-cell lymphoma, nasal type.- Primary cutaneous CD8+ aggressive epidermotropic cytotoxic T-cell lymphoma.- Primary cutaneous γ/δ T-cell lymphoma.- Diffuse large B-cell lymphoma, leg type.- Intravascular lymphoma.- Blastic plasmacytoid dendritic cell neoplasm.- Cutaneous Metastases of Breast Carcinoma.- Cutaneous metastases of the gastrointestinal tract.- Cutaneous metastases of lung cancer.- Cutaneous metastases of the kidney and urogenital system.- Miscellaneous Skin Metastases.