Elderly man with a pulmonary mass and osteolytic lesions: is it primary pulmonary plasmacytoma or multiple myeloma with an extramedullary pulmonary nodule?

The presence of these plasma cells could mean primary pulmonary plasmacytoma or multiple myeloma with extramedullary pulmonary dissemination. [...]all patients must be evaluated for multiple myeloma with (1) tests for classical CRAB symptoms: hypercalcaemia, renal impairment, anaemia or bone abnorma...

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