[Mediastinal tuberculous lymphadenitis in a chronic renal failure patient with elevated serum pro-GRP level]

A 56-year-old man treated by peritoneal dialysis was admitted to our hospital because of abnormal shadows on chest radiographs. Chest CT revealed enlarged paraaortic lymph nodes (30 mm x 40 mm) and a tuberculoma in the left upper lobe. The serum level of pro-GRP was significantly above the cutoff value, but tuberculous mediastinal lymphadenopathy was identified from mediastinal lymph node biopsy specimens. We concluded that the elevation of the serum pro-GRP concentration was due to decreased renal clearance resulting from the chronic renal failure.