8042/3 Oat cell carcinoma


Bronchus and lung
ICD-O-3 topography code: C34
ICD10: C34

A neuroendocrine carcinoma composed of small malignant cells which are often said to resemble "oat cells" under the microscope. Small cell carcinoma most often affects the lungs. Clinically, this is often a rapidly growing cancer that spreads to distant sites early.