SOLITARY PLASMACYTOMA OF THE LUNG WITH LIGHT-CHAIN EXTRACELLULAR DEPOSITS - A CASE-REPORT AND REVIEW OF THE LITERATURE

Aims: We present the clinical and histopathological findings of an unu sual pulmonary plasmacytoma associated with light chain deposits. Meth ods and results: The tumour was located in the main left stem bronchus 40 mm from the carina, Histologically, it was composed of sheets of w ell differentiated plasma cells. Large extracellular deposits of amorp hous material were observed In the tumour. These deposits were Congo r ed negative and contained kappa light chains. They were electron dense granular and non-filamentous. No plasmacytosis was identified by bone marrow biopsy and no monoclonal spike was shown by serum and urine el ectrophoresis. Conclusions: Our case is unusual in being endobronchial and showing light chain deposition.