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Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases

We report two cases of a giant extrasynovial osteochondroma of the knee located in the infrapatellar fat pad region, in two females who were 58 and 71 years old respectively. Both patients had noticed the mass many years before our first clinical observation. In both patients, at physical examinatio...

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Autores principales: De Maio, F, Bisicchia, S, Potenza, V, Caterini, R, Farsetti, P
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Bentham Open 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3219887/
https://www.ncbi.nlm.nih.gov/pubmed/22114658
http://dx.doi.org/10.2174/1874325001105010368
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author De Maio, F
Bisicchia, S
Potenza, V
Caterini, R
Farsetti, P
author_facet De Maio, F
Bisicchia, S
Potenza, V
Caterini, R
Farsetti, P
author_sort De Maio, F
collection PubMed
description We report two cases of a giant extrasynovial osteochondroma of the knee located in the infrapatellar fat pad region, in two females who were 58 and 71 years old respectively. Both patients had noticed the mass many years before our first clinical observation. In both patients, at physical examination a solid, firm and hard mass was palpable in the anterior part of the knee in Hoffa’s fat pad region, and the range of motion of the knee was severely restricted and painful. CT scan examination with 3D-reconstruction showed two large, calcified neoformations behind the patellar tendon, between the apex of the patella and the proximal third of the tibia. In both cases, the mass was completely resected surgically through an anterior longitudinal approach. At histological examination, the excised masses consisted of an outer layer of hyaline cartilage without significant chondrocyte atypia and an inner region of bone trabeculae formed by endochondral ossification. At follow-up, 8 and 4 years after the operation, both patients were pain-free, with complete recovery of the range of motion of the knee and without any clinical or radiographic evidence of recurrence. The authors believe that intra-articular extrasynovial osteochondroma of the knee is a primary metaplasia of Hoffa’s fat pad. Usually, the tumor develops slowly and asymptomatically over many years. The treatment of choice is a marginal resection of the mass, although a biopsy should be considered in some cases. Recurrences are extremely rare.
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spelling pubmed-32198872011-11-23 Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases De Maio, F Bisicchia, S Potenza, V Caterini, R Farsetti, P Open Orthop J Article We report two cases of a giant extrasynovial osteochondroma of the knee located in the infrapatellar fat pad region, in two females who were 58 and 71 years old respectively. Both patients had noticed the mass many years before our first clinical observation. In both patients, at physical examination a solid, firm and hard mass was palpable in the anterior part of the knee in Hoffa’s fat pad region, and the range of motion of the knee was severely restricted and painful. CT scan examination with 3D-reconstruction showed two large, calcified neoformations behind the patellar tendon, between the apex of the patella and the proximal third of the tibia. In both cases, the mass was completely resected surgically through an anterior longitudinal approach. At histological examination, the excised masses consisted of an outer layer of hyaline cartilage without significant chondrocyte atypia and an inner region of bone trabeculae formed by endochondral ossification. At follow-up, 8 and 4 years after the operation, both patients were pain-free, with complete recovery of the range of motion of the knee and without any clinical or radiographic evidence of recurrence. The authors believe that intra-articular extrasynovial osteochondroma of the knee is a primary metaplasia of Hoffa’s fat pad. Usually, the tumor develops slowly and asymptomatically over many years. The treatment of choice is a marginal resection of the mass, although a biopsy should be considered in some cases. Recurrences are extremely rare. Bentham Open 2011-11-04 /pmc/articles/PMC3219887/ /pubmed/22114658 http://dx.doi.org/10.2174/1874325001105010368 Text en © De Maio et al.; Licensee Bentham Open. http://creativecommons.org/licenses/by-nc/3.0/ This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
spellingShingle Article
De Maio, F
Bisicchia, S
Potenza, V
Caterini, R
Farsetti, P
Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases
title Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases
title_full Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases
title_fullStr Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases
title_full_unstemmed Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases
title_short Giant Intra-Articular Extrasynovial Osteochondroma of the Knee: A Report of Two Cases
title_sort giant intra-articular extrasynovial osteochondroma of the knee: a report of two cases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3219887/
https://www.ncbi.nlm.nih.gov/pubmed/22114658
http://dx.doi.org/10.2174/1874325001105010368
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