Occult Lung Small Cell Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A small cell lung carcinoma detectable by sputum cytology only. The primary tumor is undetectable radiographically or during bronchoscopy; therefore, it can not be assessed.

**Synonyms:** - Occult Small Cell Carcinoma of Lung - Occult Small Cell Carcinoma of the Lung - Occult Small Cell Lung Carcinoma