The aetiology of painful dorsal wrist ganglia remains obscure. In a prospec
tive study we investigated the link between a painful dorsal wrist ganglion
and wrist joint abnormality with wrist arthroscopy before excision of the
ganglion. Of 16 wrists arthroscoped 12 were abnormal, 10 had an abnormal sc
apholunate joint, and two had abnormal lunatetriquetral joints. We think th
at painful dorsal wrist ganglia, like popliteal cysts in the knee, are mark
ers of underlying joint abnormalities. Surgeons who treat painful ganglia s
hould be aware of a possible underlying cause so that they can target treat
ment more accurately, particularly in recurrent cases and those patients wi
th persistent wrist pain after excision of the ganglion.