Merkel Cell Carcinoma Key Points Merkel cell carcinoma (MCC) is a rare, aggressive, cutaneous neuroendocrine malignancy The majority of MCC tumors occur on the face and head, but only 5%…

Malignant Melanoma Key Points Cutaneous malignant melanoma is an invasive tumor of malignant melanocytes On the eyelid, malignant melanoma accounts for about 1% of all eyelid malignancies On the eyelids,…

Lymphoma Key Points Lymphoma is a malignant neoplasm originating from clonal proliferations of monoclonal B cell, T cell, and natural killer cell lymphocytes The ocular adnexa is involved in 2%…

Liposarcoma Key Points Liposarcoma (LPS) is the most common soft tissue sarcoma in adults In the periorbital region, liposarcomas may present in the orbit or on the eyelid They originate…

Leukemia Cutis Key Points Leukemia is a cancer of myelogenous and lymphatic precursor blood-forming cells, and with infiltration of the epidermis, dermis, and subcutis it results in extramedullary lesions such…

Kaposi Sarcoma Key Points Kaposi sarcoma (KS) is a low-grade, multicentric, vascular neoplasm Classic KS occurs in elderly men of southern European ancestry, typically on the lower extremities Endemic KS…

Fibrosarcoma Key Points Fibrosarcoma (FS) is a highly malignant tumor of fibrous tissue These tumors predominantly arise from tendons and fascia of deep soft tissues, most often in the extremities,…

Dermatofibrosarcoma Protuberans Key Points Dermatofibrosarcoma protuberans is a fibroblastic cutaneous sarcoma that represents the most common dermal sarcoma It has a very low metastatic potential but has a tendency for…

Basal Cell Carcinoma Key Points Basal cell carcinoma (BCC) is the most common malignant neoplasm of the skin, and in the eyelids it accounts for about 80% to 85% of…

Cutaneous T-Cell Lymphoma Key Points Primary cutaneous T-cell lymphoma is a heterogeneous group of non-Hodgkin lymphomas that is responsible for two-thirds of all cutaneous lymphomas The most common forms are…