Abstract
We encountered a rare case of a periosteal ganglion cyst at the plantar aspect of
the metatarsal that induced a stress fracture in a 77-year-old female. The clinical
manifestation of the plantar ganglion cyst of the foot was not evident because of
its location deep beneath the plantar fascia. A pressure cortical indentation was
detected at the metatarsal neck on the initial radiographs. Magnetic resonance imaging
showed a stress fracture of the metatarsal with a ganglion cyst. The stress fracture
was thought to have resulted from several factors, including structural weakness due
to bony absorption from the ganglion cyst, osteoporosis that induced a fragility fracture,
and a load-induced fatigue fracture. The fracture completely healed following complete
resection of the ganglion cyst with the surrounding periosteum along with medication
for osteoporosis. When confirmation of a stress fracture is necessary or when presentation
of a stress fracture is atypical, magnetic resonance imaging should be considered
to confirm or rule out any other associated pathologic features. Resection of the
periosteal ganglion cyst with the surrounding periosteum is important to prevent recurrence.
Level of Clinical Evidence
Keywords
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Article info
Publication history
Published online: July 29, 2017
Footnotes
Financial Disclosure: None reported.
Conflict of Interest: None reported.
Identification
Copyright
© 2017 by the American College of Foot and Ankle Surgeons. All rights reserved.
