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.