title: Symptomatic Accessory Medial Meniscus Associated With Popliteal Pterygium Syndrome.
abstract: BACKGROUND
  Anomalies of the meniscus are uncommon. These anomalous formations have been predominately described in the lateral compartment of the knee. Congenital abnormalities of the medial meniscus are rare.
  
  
  METHODS
  Chart and radiographic review of a single patient with a symptomatic congenital abnormality of the medial meniscus.
  
  
  RESULTS
  The patient was a 5-year-old boy with popliteal pterygium who developed painful snapping in the medial knee after anterior hemiepiphyseodesis to improve his knee extension. The patient had achieved full-knee extension from a preoperative 45-degree flexion contracture. The newly developed snapping was attributed to the hemiepiphyseodesis implants. After implant removal, the snapping persisted and was localized at the medial joint line. Through an arthrotomy, a medial meniscus abnormality was identified and excised with resolution of symptoms.
  
  
  CONCLUSIONS
  This report describes a symptomatic congenital abnormality of the medial meniscus in a child with popliteal pterygium. The patient was treated with excision of the anomalous structure with complete resolution of the symptoms. This is the first report of an intra-articular knee anomaly associated with popliteal pterygium syndrome.
authors.affiliation: *Medical Center East, Vanderbilt Orthopaedic Institute ‡Monroe Carell Jr. Children's Hospital at Vanderbilt †Vanderbilt Department of Radiology, Nashville, TN.
authors.forename: Shawn S
authors.initials: SS
authors.lastname: Funk
authors.forename: J Jake
authors.initials: JJ
authors.lastname: Block
authors.forename: Jeffrey E
authors.initials: JE
authors.lastname: Martus
authors.forename: Jonathan G
authors.initials: JG
authors.lastname: Schoenecker
mesh_terms: D002648:Child; D002971:Cleft Lip / Q000150:complications*; D002972:Cleft Palate / Q000150:complications*; D005124:Eye Abnormalities / Q000150:complications*; D005385:Fingers / Q000002:abnormalities*; D006801:Humans; D007593:Joint Instability / Q000209:etiology*; D007719:Knee Joint / Q000002:abnormalities*; D038061:Lower Extremity Deformities, Congenital / Q000150:complications*; D008297:Male; D008592:Menisci, Tibial / Q000002:abnormalities*; D013576:Syndactyly / Q000150:complications*; D014564:Urogenital Abnormalities / Q000150:complications*