"Floor layers foot'--an occupational bursa.

A 24 year old man p resented wit h a la rge cystic swelling on the dorsolateral aspect of his right foot that had been presen t for some seven months (Fig, I ). This was considered to be an adventitious bursa \v hich had a ri sen as a resul t of his occupa tion as a noor-layer, At opcratjon 0 11 3 F ebruar y 1977 the forefoot was explored through a transverse incision over the swelling and a th ick wa lled bursa was found between the superficial and deep fi bres of the extenso r retinaculum. The bursa contained clea r bloudstained serollS fluid and was excised. Macroscopically the spec imen measured n x 5 x 4 cm and its wall was 0,7 cm th ick. Histo logical examinatio n of rhe specimen showed it to be a cyst with a fibro collagenous wa ll a nd a smooth non-synovial lin ing. React ive vascularisation was a lso seen a round the