We describe a 34-year-old man in whom non-union of a patellar fracture
led to an unrecognized diagnosis of gout. He presented with a mass in
the superolateral quadrant of the patella, which had the radiographic
appearance of a non-united fracture. In the operating room, a gouty t
ophus was found. Although patellar tophi are uncommon, gout should be
included in the differential diagnosis of non-united patellar fracture
s.