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Pregled bibliografske jedinice broj: 838930

Unusual shapes of lateral plica in adolescents

Đudarić, Luka; Roth, Sandor; Cvijanović, Olga; Bobinac, Dragica
Unusual shapes of lateral plica in adolescents // Poster presentations of the 8th International Symposium of Clinical and Applied Anatomy (pdf version) / - (ur.).
Budapest: -, 2016. str. 60-60 (poster, međunarodna recenzija, sažetak, znanstveni)

Unusual shapes of lateral plica in adolescents

Đudarić, Luka ; Roth, Sandor ; Cvijanović, Olga ; Bobinac, Dragica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Poster presentations of the 8th International Symposium of Clinical and Applied Anatomy (pdf version) / - Budapest, 2016, 60-60

8th International Symposium of Clinical and Applied Anatomy

Mjesto i datum
Budapest, Hungary, 1-03.09.2016

Vrsta sudjelovanja

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Synovial lateral knee plica; anatomy; adolescents

Introduction. Synovial plicae in the knee joint are remnants of embryonal mesenchymal tissue which fills the space between the femur and tibia during embryonic joint development. Formation of the joint cavity begins approximately at 8th week of embryonic development as a result of programmed resorption of the mesenchymal tissue. Mesenchymal resorption starts with a smaller cavities in the the joint space and spreads to the remaining mesenchymal tissue. Once the mesenchymal tissue is completely resorbed, the knee joint cavity is formed as a single space. According to some authors pathological condition secondary to inflammation can affect the joint. There are 4 types of knee synovial plicae: infrapatellar, mediopatellar, suprapatellar and lateral (prevalence not well known, range is approximately 1 to 2%). Aim. Our aim was to present three adolescent patients, each with unusually formed residual plicae in the suprapatelo-lateral space of the knee, which were discovered by therapeutic arthroscopy treatment of recurrent luxation of the patella. Materials and Methods. Unusual intraarticular structures, which resembled to ligament, were found in three children aged from 12 to 14 yrs. Synovial plicae stretched from the medial suprapatellar to the lateral part of the articular capsule. During knee flexion the synovial plicae pulled the patella laterally and caused the obvious luxation of the patella. After these unusual structures were removed surgically, tissue samples were obtained and treated by antibodies against collagen type I and collagen type III. Results. Longitudinal histological slices were stained by HE, and on each slice central and peripheral zones were recognized. The central zone consisted of collagen fibers which were linearly arranged, with few fibroblasts between them. The blood vessels were very rare. Peripheral zone of the tissue sample is synovial sheet with a continuous layer of stratified lining epithelial cells on the surface. Beneath epithelial cells, connective tissue matrix contains blood vessels. Here, in the peripheral zone, collagen fibers were not parallel and we did not find any morphological signs of the inflammation. Immunohistochemical analyses revealed numerous type III collagen fibers, localized in the blood vessel's wall and in adjacent stroma around them. Except for those, type III collagen fibers were also located beneath epithelial layer. Only few immunopositive type I collagen fibers were detected, with overall prevalence of the type III collagen fibers. Conclusion. From above received histological findings we have presumed examined structure is probably the plica, which is relatively common occurrence and could be associated with inflammation and some other pathological conditions in orthopedics. Until now such shapes of the plicae which resembled to the ligament were not described in available literature. During adolescence lateral synovial plicae may cause lateral luxation of the patella, especially in athletes.

Izvorni jezik

Znanstvena područja
Temeljne medicinske znanosti


Projekt / tema
062-0620226-0207 - Promjene koštanog metabolizma u bolestima bubrega i jetre (Dragica Bobinac, )

Medicinski fakultet, Rijeka