A Case of Infrapatellar Fat Pad Ganglion of the Knee

Abstract

Introduction:A ganglion cyst can induce symptoms around the knee and should be considered as an intra-articular mass in differential diagnosis.Case Presentation:A 22-year-old female presented with a persistent medial knee joint pain in her left knee for 2 years. There was soft tissue swelling on the anteromedial aspect of the infrapatellar region on her left knee. Lachman and McMurray tests were negative. MRI showed a multilobular cyst in the infrapatellar fat pad with T1 low intensity and T2 STIR high intensity. The cyst was not attached to either meniscus. ACL and PCL looked normal.During surgery, the cyst was found to arise from the intra-patellar fat pad and was not attached to the menisci or synovium. The cyst was completely resected.Histological findings showed a multilobular cyst with a glassy fibrous tissue wall and clear jelly-like consistency, confirming the diagnosis of a ganglion. The patient recovered asymptomatically and has been without recurrence 7 years postoperatively.Conclusion:Differential diagnoses of an infrapatellar swelling are a meniscal cyst, synovial cyst, or ganglion. Most cases of cysts around the knee generate from fluid collection through meniscal tears. A ganglion cyst is a synovium-lined structure and is common around the wrist joint, but rare in the knee joint. A ganglion cyst in the knee joint often arises from ACL or PCL, but rarely arises from the infrapatellar fat pad. A ganglion cyst is one of the differential diagnoses of parameniscal cysts around the knee. We recommended an open resection with arthroscopic examination.

End Stage Hoffa’s Disease Presented as a Giant Osteochondroma: Case Report and Literature Review

“…Regarding treatment at this stage, Authors agree on surgical excision, which can be open or arthroscopic. [11,12] All the authors recommend carrying out anatomo-cytopathological analyses. In cases of Hoffa's tumor invasion, the surgical approach is recommended, thus allowing excision in one piece [13].…”

Infrapatellar Ganglion Cyst of the Knee Fat Pad in a Child with Juvenile Idiopathic Arthritis

“…Ganglion cysts are benign cystic tumor-like lesions surrounded by dense connective tissue capsules containing myxoid matrix 1,2 . Ganglion cysts rarely arise from the infrapatellar fat pad 1,2,3,4 .…”

“…Ganglion cysts are benign cystic tumor-like lesions surrounded by dense connective tissue capsules containing myxoid matrix 1,2 . Ganglion cysts rarely arise from the infrapatellar fat pad 1,2,3,4 . Clinical symptoms of ganglion cysts, including knee pain, decreased range of motion, clicking or popping sensations and a palpable mass are nonspecific and depend on their size and location 1,2,3,4 .…”

“…Ganglion cysts rarely arise from the infrapatellar fat pad 1,2,3,4 . Clinical symptoms of ganglion cysts, including knee pain, decreased range of motion, clicking or popping sensations and a palpable mass are nonspecific and depend on their size and location 1,2,3,4 . These symptoms overlap with and mimic the common complaints of patients with JIA.…”