An Unusual Case of Cystic Lung Disease with small Cell Lung Cancer

Cystic lung disease is nowadays being increasingly identified as newer diagnostics facilities are available. Cystic lung disease is a broad group starting from infection like pneumocystis to even malignancy. In our case a young female from Rural Bengal came with a history of cough and progressive dyspneoa for 3 years and hemoptysis and weight loss for 3 months. She had clubbing and on auscultation of chest bilateral basal crepts were heard. Her previous reports showed that she had done an HRCT thorax already 4 months ago which revealed a cystic lung disease. She was also positive for anti Scl 70 antibody and treatment with Sirolimus was given by Rheumatology department. However due to the presenting symptoms we did a new HRCT thorax which revealed a Lung mass that on CT true cut biopsy proved to be a Small Cell Lung Cancer . This is a proof that cystic lung disease if not investigated thoroughly and followed up regularly may be a misdiagnosed case of another lung disease that me land up disastrous.