Glomerulonephritis associated with basaloid squamous cell carcinoma of the oesophagus. A possible unusual paraneoplastic syndrome.

A 70-year-old man presented with rash, microscopic haematuria and proteinuria. The renal biopsy showed mesangial proliferative glomerulonephritis with mesangial IgA deposition. He was subsequently found to have basaloid squamous carcinoma of the oesophagus. This possible association between IgA nephropathy and oesophageal basaloid squamous carcinoma has never been reported.