Primary Cutaneous Peripheral T-Cell Lymphoma, Not Otherwise Specified

**Semantic type:** Neoplastic Process

**Definition:** An exceedingly rare peripheral T-cell lymphoma that arises from the skin and does not meet the criteria that define the other well characterized primary cutaneous peripheral T-cell lymphomas, i.e., it is a diagnosis of exclusion.

**Synonyms:** - Primary Cutaneous Peripheral T-Cell Lymphoma, NOS - Primary Cutaneous Peripheral T-Cell Lymphoma, Unspecified - pcPTCL-NOS