Experimental Organism Endocardial Schwannoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant schwannoma of the heart arising from subendocardial schwann cells that appear as an expansile spindle cell mass, which may infiltrate the myocardium and protrude into the ventricular lumen. (INHAND)

**Synonyms:** - SCHWANNOMA, ENDOCARDIAL, MALIGNANT