Gastric Leiomyosarcoma, also known as leiomyosarcoma of stomach, is related to pheochromocytoma/paraganglioma syndrome 1 and carney triad. An important gene associated with Gastric Leiomyosarcoma is SDHD (Succinate Dehydrogenase Complex Subunit D), and among its related pathways/superpathways are Development Angiotensin activation of ERK and Respiratory electron transport, ATP synthesis by chemiosmotic coupling, and heat production by uncoupling proteins.. Affiliated tissues include smooth muscle and liver, and related phenotypes are neoplasm and renal/urinary system