Elevated serum chromogranin A concentrations in small-cell lung carcinoma.
Serum chromogranin A concentrations measured by radioimmunoassay in patients with small-cell lung carcinoma were compared with values from healthy adults and patients with non-small-cell lung carcinoma or chronic obstructive pulmonary disease. The mean (+/- SE) level was significantly higher (p less than or equal to 0.02) in patients with small-cell lung carcinoma (815 +/- 290 ng/mL, n = 46) than in normal controls (123 +/- 6 ng/mL, n = 20) or patients with chronic obstructive pulmonary disease (169 +/- 18 ng/mL, n = 39), lung adenocarcinoma (180 +/- 22, ng/mL, n = 62), large-cell lung carcinoma (183 +/- 23 ng/mL, n = 18), or lung epidermoid carcinoma (203 +/- 37 ng/mL, n = 78). The mean concentration in extensive-stage small-cell lung carcinoma (1155 +/- 449 ng/mL, n = 29) was significantly greater (p = 0.026) than in limited disease (234 +/- 56 ng/mL, n = 17). Elevated serum chromogranin A values were seen in 53% of patients with limited and 72% with extensive disease. Four patients originally classified as having non-small-cell lung carcinomas with raised chromogranin A levels were subsequently found to have mixed small-cell and non-small-cell tumors. Serum chromogranin A concentrations may be a useful marker of small-cell lung carcinoma disease activity.
D000328:Adult; D002289:Carcinoma, Non-Small-Cell Lung / Q000097:blood; D018288:Carcinoma, Small Cell / Q000097:blood*; D053379:Chromogranin A; D002864:Chromogranins / Q000097:blood*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood; D008175:Lung Neoplasms / Q000097:blood*; D009419:Nerve Tissue Proteins / Q000097:blood*; D011863:Radioimmunoassay; D012016:Reference Values
C506150:CHGA protein, human; D053379:Chromogranin A; D002864:Chromogranins; D009419:Nerve Tissue Proteins