[Multiple Cysts Formation in Pulmonary Light Chain Deposition Disease(LCDD)-A Case Report].

Aim: To review the clinical features of the patient with cystic pulmonary light chain deposition disease(LCDD)and record high-resolution CT and histopathological findings.

Patient: A 60-year-old woman who diagnosed multiple myeloma was admitted. There were diffuse proliferation of plasma cells by the bone marrow puncture that she received. And multiple cystic pulmonary tumors found in CT. We analyzed the method and result of the diagnosis. CT showed multiple cystic pulmonary tumors in the both lung which vessels traversing the cysts with thin wall ranged 5 to 30 millimeters. There were no abnormality in the heart, kidney and liver. Right upper lobe wedge resection was performed via video-assisted thoracic surgery( VATS)to establish a definitive diagnosis. Thoracoscopic findings revealed multiple white oval formed tumors in the visceral pleura. Histological HE staining findings of the surgical specimen revealed amyloid-like acidophilic material, and the immunohistochemical Congo red staining revealed monoclonal IgG with a kappa component. According to the above results these tumors had a diagnosis of pulmonary LCDD.

Conclusion: VATS was effective to diagnose pulmonary LCDD in multiple cysts formation.