title: The mechanism underlying combined medial and lateral plantar and tibial intraneural ganglia in the tarsal tunnel.
abstract: Intraneural ganglion cysts in the tarsal tunnel are rare. We present a patient who had an intraneural ganglion cyst involving the medial and lateral plantar and distal tibial nerves. Magnetic resonance imaging revealed evidence to support the joint-related (i.e., subtalar) origin of the cyst. Careful reinterpretation of the imaging supported a phasic mechanism (i.e., cross-over) to explain the interrelated pathogenesis of the intraneural cyst within the three nerves. This mechanism is analogous to that described for the prototypes-the peroneal, tibial and sciatic nerves in the knee region-and can be generalized to other nerves in the foot and ankle region. We believe that understanding the pathogenesis sheds light on the effective treatment.
authors: Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada.
authors: Albert M
authors: AM
authors: Isaacs
authors: Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada.
authors: Rajiv
authors: R
authors: Midha
authors: Department of Orthopedics, Mayo Clinic, Rochester, MN, USA.
authors: Nicholas M
authors: NM
authors: Desy
authors: Department of Radiology, Mayo Clinic, Rochester, MN, USA.
authors: Kimberly K
authors: KK
authors: Amrami
authors: Department of Orthopedics, Mayo Clinic, Rochester, MN, USA. spinner.robert@mayo.edu.|Department of Neurosurgery, Mayo Clinic, Rochester, MN, USA. spinner.robert@mayo.edu.
authors: Robert J
authors: RJ
authors: Spinner
mesh_terms: D000842:Ankle / Q000000981:diagnostic imaging* / Q000601:surgery; D045888:Ganglion Cysts / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013979:Tibial Nerve / Q000000981:diagnostic imaging*; D055815:Young Adult
keywords: Articular theory; Cross-over; Intraneural ganglion cyst