IgM-Positive Primary Cutaneous Marginal Zone Lymphoproliferative Disorder

**Semantic type:** Neoplastic Process

**Definition:** A primary cutaneous marginal zone lymphoproliferative disorder characterized by expression of IgM and absence of class-switched immunoglobulin heavy chain expression.

**Synonyms:** - IgM Positive Primary Cutaneous Marginal Zone Lymphoproliferative Disorder