Erosive tophaceous gout

Case contributed by Dr Sachintha Hapugoda


Chronic left foot pain. History of gout.

Patient Data

Age: 70 years

Significant bony erosion of the distal 1st metatarsal, proximal 1st phalanx and base of the distal 1st phalanx with a rat-bitten appearance and overhanging edges. Surrounding soft tissue swelling medial to the erosion with increased density and calcific foci. Erosions involving midfoot and tarsometatarsal joints. Overall, appearances are in keeping with erosive tophaceous gout.


Extensive tophaceous deposits throughout the foot, centered predominantly at the ankle joint, the first metatarsophalangeal joint and the interphalangeal joint of the great toe. There is also a prominent deposit adjacent to the base of the 5th metatarsal.

Besides the rat-bite erosions to the head of the 1st metatarsal and the 1st toe phalanges, coarse erosions scattered throughout the midfoot and tarsometatarsal joints, even involving a type II accessory navicular bone.

Case Discussion

A typical case of erosive tophaceous gout. In particular, a good example of the rat bite erosions that can be seen on the plain radiograph.

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Case information

rID: 59659
Published: 19th Apr 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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