title: Postoperative discal cyst: An unusual complication after microendoscopic discectomy in teenagers.
abstract: Various complications after microendoscopic discectomy (MED) are well known, but postoperative discal cyst is a unique and relatively unknown complication. Here, we report on two teenage patients who presented with postoperative discal cyst after MED for herniated nucleus pulposus (HNP), which resolved after conservative treatment. The patients were diagnosed with HNP at L4-5 and L5-S1 based on MRI and then treated by MED. Postoperative discal cyst was diagnosed on MRI after recurrence of symptoms. Both patients were managed conservatively. T2-weighted MRI demonstrated hyperintense collections adjacent to the operated intervertebral disc level, which were communicating with the corresponding disc annulus. Because the clinical symptoms were relatively mild, the patients were managed conservatively; both made a complete clinical recovery with radiological evidence of improvement. Postoperative discal cyst is a relatively unknown complication after MED for HNP. Surgeons should be aware of this postoperative complication when operating on young individuals with HNP.
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Subash C
authors.initials: SC
authors.lastname: Jha
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Tonogai
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Kosaku
authors.initials: K
authors.lastname: Higashino
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Toshinori
authors.initials: T
authors.lastname: Sakai
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Takata
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Goda
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Abe
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Nagamachi
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Shoji
authors.initials: S
authors.lastname: Fukuta
authors.affiliation: Department of Orthopedics, Tokushima University, Tokushima, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Sairyo
mesh_terms: D000293:Adolescent; D003560:Cysts / Q000175:diagnosis* / Q000209:etiology*; D017587:Diskectomy, Percutaneous; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D011183:Postoperative Complications / Q000175:diagnosis* / Q000209:etiology*
keywords: Herniated nucleus pulposus; microendoscopic discectomy; postoperative discal cyst