Sellar Region Granular Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** A generally benign intrasellar and/or suprasellar mass arising from the neurohypophysis or infundibulum. It is composed of nests of large cells with granular, eosinophilic cytoplasm due to abundant intracytoplasmic lysosomes. It generally has a slow progression and lacks invasive growth. (Adapted from WHO)

**Synonyms:** - Granular Cell Tumor of Neurohypophysis - Granular Cell Tumor of the Neurohypophysis - Granular Cell Tumor of the Neurohypophysis (WHO Grade 1) - Granular Cell Tumor of the Neurohypophysis (WHO Grade I) - Granular Cell Tumor of the Posterior Pituitary Gland - Granular Cell Tumor of the Sellar Region - Granular Cell Tumour of the Sellar Region/Granular Cell Pituicytoma - Granular cell tumor of the sellar region