Metastatic Malignant Neoplasm in the Pituitary Gland

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm metastasizing to the pituitary gland from another anatomic site. The vast majority are carcinomas usually arising from the breast, lung, and gastrointestinal tract.

**Synonyms:** - Metastasis to Pituitary Gland - Metastatic Malignant Neoplasm to the Pituitary Gland - Metastatic Neoplasm to the Pituitary Gland