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Digital mucoid cyst: the ganglion type
Author(s) -
HernándezLugo Ana Marcela,
DomínguezCherit Judith,
VegaMemije María Elisa
Publication year - 1999
Publication title -
international journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 93
eISSN - 1365-4632
pISSN - 0011-9059
DOI - 10.1046/j.1365-4362.1999.00715.x
Subject(s) - medicine , cyst , anatomy , ganglion cyst , joint capsule , distal interphalangeal joint , lesion , surgery
A 43‐year‐old woman presented with a soft, smooth, cystic, slightly erythematous, dome‐shaped nodule, 6 × 8 mm in diameter, located on the dorsum of the middle finger of the right hand, between the proximal fold and the distal interphalangeal joint, lateral to the midline ( Fig. 1 ). The nail of the affected finger showed longitudinal grooving and mild distal transverse overcurvature. The lesion had been present for 3 months and was tender upon pressure. 1Digital mucoid cyst, lateral to the midline of the third finger, causing nail deformity Clinical examination revealed early signs of osteoarthritis and Heberden’s nodes on the distal interphalangeal joints of both hands. Previous treatment included the intake of nonsteroidal anti‐inflammatory drugs (NSAIDs) indicated by a rheumatologist. An X‐ray of the right hand showed decreased joint spaces between the second and third phalanges of the middle finger. Diagnosis of a digital mucoid cyst (with nail deformity secondary to the former) was made. Surgical excision was performed. During surgery, a pedicle connecting the cyst to the joint capsule was clearly observed and two satellite lesions were also found ( Fig. 2 ). The cyst and its satellite lesion, including the communicating tract, were totally removed. 2(A) direct link of the cyst to the distal interphalangeal joint during surgery is clearly observed The histopathologic study showed large cystic spaces containing mucin (colloidal iron stain) which were lined in some areas by synovial membrane ( Fig. 3 ). The histopathologic report was compatible with a digital mucoid cyst of the ganglion type. 3Large cystic spaces containing mucin lined, in some areas, by synovial membrane (×100, original magnification) Six months after excision, no recurrence has been detected, and the nail plate deformities have improved.