title: [Dorsal mucoid cyst--ganglion-like pseudocyst of the joint space].
abstract: A myxoid cyst on the dorsum of the left index finger is presented. A connection of this pseudocyst to the underlying joint was shown by means of magnetic resonance imaging. Surgically the connecting tract to the distal interphalangeal joint was easily demonstrated and histologically a ductal structure was focally seen by means of serial sections. These structures also suggest such a connection. These findings confirm the view that this pseudocyst can be interpreted as a ganglion. Therapeutically complete excision with careful tying off of the channel to the joint appears to be the best method to avoid recurrence. The injection of sclerosing agents, a conservative treatment modality proposed by some authors, may be problematic in the light of the pathogenesis discussed here; however damage to the finger joint has not been so far observed.
authors.affiliation: Labor für Dermatohistopathologie, München.
authors.forename: C
authors.initials: C
authors.lastname: Schmoeckel
authors.forename: G
authors.initials: G
authors.lastname: von Mallinckrodt
authors.forename: M
authors.initials: M
authors.lastname: Risch
mesh_terms: D003937:Diagnosis, Differential; D005384:Finger Joint / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013581:Synovial Cyst / Q000175:diagnosis* / Q000601:surgery