title: Cysts and cystic-appearing lesions of the knee: A pictorial essay.
abstract: Cysts and cystic-appearing lesions around the knee are common and can be divided into true cysts (synovial cysts, bursae, ganglia, and meniscal cysts) and lesions that mimic cysts (hematomas, seromas, abscesses, vascular lesions, and neoplasms). The specific anatomic location of the cystic lesion often permits the correct diagnosis. In difficult cases, identifying a cystic mass in an atypical location and/or visualizing internal solid contrast enhancement on magnetic resonance imaging (MRI) should raise concern for a neoplasm and the need for further evaluation and intervention.
authors.affiliation: Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston MA 02215, USA.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Telischak
authors.affiliation: Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston MA 02215, USA.
authors.forename: Jim S
authors.initials: JS
authors.lastname: Wu
authors.affiliation: Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston MA 02215, USA.
authors.forename: Ronald L
authors.initials: RL
authors.lastname: Eisenberg
keywords: Bursa; cyst; knee; synovial cyst