Ectopic ACTH syndrome

Small-cell carcinoma is a type of highly malignant cancer that most commonly arises within the lung, although it can occasionally arise in other body sites, such as the cervix, prostate, and gastrointestinal tract. Compared to non-small cell carcinoma, small cell carcinoma has a shorter doubling time, higher growth fraction, and earlier development of metastases. Anaplastic (microcellular, oat cell) carcinoma from the lung (histopathology)Histopathologic image of small-cell carcinoma of the lung. CT-guided core needle biopsy. Small-cell carcinoma is a type of highly malignant cancer that most commonly arises within the lung, although it can occasionally arise in other body sites, such as the cervix, prostate, and gastrointestinal tract. Compared to non-small cell carcinoma, small cell carcinoma has a shorter doubling time, higher growth fraction, and earlier development of metastases. 10-year relative survival rate is 3.5%; however, women have higher 10-year survival rate, 4.3%, and men lower, 2.8%. Small-cell lung carcinoma has long been divided into two clinicopathological stages, including limited stage (LS) and extensive stage (ES). The stage is generally determined by the presence or absence of metastases, whether or not the tumor appears limited to the thorax, and whether or not the entire tumor burden within the chest can feasibly be encompassed within a single radiotherapy portal. In general, if the tumor is confined to one lung and the lymph nodes close to that lung, the cancer is said to be LS. If the cancer has spread beyond that, it is said to be ES. In cases of LS-SCLC, combination chemotherapy (often including cyclophosphamide, cisplatin, doxorubicin, etoposide, vincristine and/or paclitaxel) is administered together with concurrent chest radiotherapy (RT).