Juxta-Articular Myxoma

**Semantic type:** Neoplastic Process

**Definition:** A rare myxoma that usually arises in an area close to a large joint. Morphologically it resembles a cellular myxoma. In contrast to an intramuscular myxoma, it is not associated with mutations of the GNAS gene.

**Synonyms:** - Juxtaarticular Myxoma - Parameniscal Cyst - Periarticular Myxoma