Extra-osseous osteochondroma-like soft tissue mass of the patello-femoral space
TLDR
An integrated clinical-pathologic diagnosis helps to clarify the nature of extraskeletal cartilaginous tumors that can arise at unusual anatomic site.Abstract:
Extraskeletal cartilaginous tumors are uncommon. Osteochondromas usually arise from the metaphyseal region of the growing skeleton. A 53 year old man presented with a three years history of anterior knee pain and inability to flex his knee more than 90°. Clinical examination and imaging studies revealed a nodular calcific mass in the anterior portion of the knee, displacing the medial portion of the patellar tendon. Following excision, histopathology confirmed the diagnosis of extra-osseous osteochondroma-like soft tissue mass, with no recurrence 24 months after surgery. An integrated clinical-pathologic diagnosis helps to clarify the nature of extraskeletal cartilaginous tumors that can arise at unusual anatomic site. Complete local surgical excision is the management of choice.read more
Citations
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Recurrence of synovial chondromatosis of the Hoffa’s body
TL;DR: A patient with synovial chondromatosis localized into the Hoffa’s body who presented with anterior knee pain and mechanical symptoms and was removed through a mini-arthrotomy is reported.
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Extraskeletal osteochondroma near the hip: a pediatric case.
TL;DR: Clinical awareness of this benign entity is important as no malignant transformation or metastasis has been reported and marginal excision with histopathological identification is the treatment of choice.
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Large para-articular osteochondroma of the knee joint: a case report
TL;DR: A unique case of large intra-articular osteochondroma of the knee of a 15-year duration is presented and it is suggested that the tumor may have remained asymptomatic for such a long period because of its slow growth and stretch elongation of the quadriceps mechanism.
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Solitary synovial osteochondroma of the knee: mimicking a giant loose body
TL;DR: An unusual presentation of an uncommon disease that is not widely known by orthopedic surgeons is reported in a 64-year-old woman with no history of trauma.
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A large extraskeletal osteochondroma of the foot.
TL;DR: A 49-year-old female who had a slow-growing mass of 4 years' duration, located on the plantar aspect of her left foot, is presented, which proved to be an extraskeletal osteochondroma, a very common benign tumors composed of cartilage and bone.
References
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Journal ArticleDOI
Paraarticular osteochondroma of the knee: report of 2 cases and review of the literature.
TL;DR: Although the exact biologic nature of these tumors is not well characterized, limited data suggest that they will behave in benign fashion, similar to soft tissue chondromas.
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Para-articular chondromas and osteochondromas: a report of three cases.
James W. Milgram,Edward J. Dunn +1 more
TL;DR: Observations in 3 middle-aged patients demonstrate that solitary osteochondromas in para-articular locations can be confused with intrasynovial oste mitochondromatosis or osteochondroma arising from bone and extending into joint regions.
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Differential diagnosis of tumours and tumour-like lesions of the infrapatellar (Hoffa’s) fat pad: pictorial review with an emphasis on MR imaging
TL;DR: The spectrum of mass-like lesions that can affect the infrapatellar (Hoffa’s) fat pad is illustrated, emphasizing the radiographic and MR findings that suggest a specific diagnosis.
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Para-articular chondroma and osteochondroma of the infrapatellar fat pad: a report of three cases.
TL;DR: Three cases of para-articular chondroma and osteochondroma in the region of infrapatellar fat pad are reported, and it is concluded that these lesions are not the same.
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Intracapsular or Para-Articular Chondroma
TL;DR: Intracapsular or para-articular chondromata usually occur at the knee where they are infrapatellar, extrasynovial, and deep to the patellar tendon, and these lesions must be differentiated from synovial chondomatosis and chondrosarcoma.