We report a case of dermatomyositis occurring in association with transitio
nal cell carcinoma of the bladder. The case illustrates the importance of a
thorough search for neoplasms in elderly patients with dermatomyositis and
is a reminder that bladder cancer may be a rare cause of dermatomyositis.
The case also shows that successful treatment of an underlying tumour may l
ead to resolution of paraneoplastic dermatomyositis, and relapse of cutaneo
us and muscle symptoms and signs may indicate recurrence of tumour.