Middle Ear Cholesterol Granuloma, also known as cholesterin granuloma of middle ear, is related to otitis media and mediastinal cancer. An important gene associated with Middle Ear Cholesterol Granuloma is C3 (Complement C3), and among its related pathways/superpathways are NF-kappaB Signaling and Hematopoietic Stem Cells and Lineage-specific Markers. Affiliated tissues include bone and kidney, and related phenotypes are immune system and hematopoietic system