Malignant Neoplasm of Unknown Primary

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm that has spread to other regions from an unknown primary anatomic site.

**Synonyms:** - CUP - CUP - Cancer of Unknown Primary - Cancer of Unknown Primary Site - Metastatic Malignant Neoplasm of Unknown Primary - Metastatic Malignant Neoplasm of Unknown Primary Origin - Metastatic Malignant Neoplasm of Unknown Primary Origin - Metastatic Neoplasm of Unknown Primary Origin - cancer of unknown primary origin - occult primary tumor