Small cell lung carcinoma (SCLC) is a type of lung cancer that typically grows and spreads quickly. It accounts for about 10-15% of all lung cancers and is strongly associated with smoking.

SCLC is characterized by small cells that grow rapidly and tend to form clusters. It is usually found in the central part of the lungs and may spread to other parts of the body, including the lymph nodes, liver, bones, and brain.

Symptoms of SCLC may include coughing, shortness of breath, chest pain, fatigue, unexplained weight loss, and recurring infections such as bronchitis or pneumonia.

Treatment for SCLC typically involves a combination of chemotherapy and radiation therapy. In some cases, surgery may also be an option. Prognosis for SCLC depends on the stage at which it is diagnosed and the overall health of the patient, but the five-year survival rate for patients with extensive-stage SCLC is generally low, at around 5%. Early detection and prompt treatment are crucial for improving outcomes.