title: Two cases of tibial nerve compression caused by uncommon popliteal cysts.
abstract: We report 2 cases of a popliteal mass of very unusual origin that induced compression neuropathy. The signs and symptoms could have been mistaken for those of a common Baker's cyst. Several recent studies have shown that the cause of Baker's cyst formation should be sought within the joint because of a communication between the gastrocnemio-semimembranosus bursa and the joint cavity. These 2 cysts had no communication with the articular joint, thus suggesting that the surgeon perform an open exploration of the popliteal fossa in the search for other cystic formations with origins and features different from Baker's cysts.
authors.affiliation: Clinica Ortopedica dell'Università di Milano, Divisione di Ortopedia, Ospedale San Raffaele, Milano, Italy. valerio.sansone@unimi.it
authors.forename: Valerio
authors.initials: V
authors.lastname: Sansone
authors.forename: Corrado
authors.initials: C
authors.lastname: Sosio
authors.forename: Marco
authors.initials: M
authors.lastname: da Gama Malchèr
authors.forename: Alessandro
authors.initials: A
authors.lastname: de Ponti
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011151:Popliteal Cyst / Q000150:complications* / Q000473:pathology / Q000601:surgery; D020429:Tibial Neuropathy / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D014057:Tomography, X-Ray Computed