Chondroblastoma of the temporomandibular joint lateral capsule: a case report

Aim: Chondroblastoma is a rare, benign bone tumor that accounts for approximately 1% of all primary bone tumors. Chondroblastoma that occurs at the temporomandibular joint can exhibit symptoms similar to those associated with other temporomandibular disorders. This case study aims to present an eight-year followup of chondroblastoma occurring at the temporomandibular joint.

Methodology: The patient presented swelling in the left temporomandibular joint and trismus. Based oncomputed tomography and magnetic resonance imaging findings, a provisional diagnosis of synovial chondromatosis was made. Complete excision of the lesion was performed under general anesthesia.

Results: After histopathological examination, the lesion was finally diagnosed as chondroblastoma. Currently, 8 years after the operation, the patient has not experienced any symptoms or any notable complications.

Conclusions: Although chondroblastoma is a benign tumor, it shows aggressive characteristics with bone invasion. Therefore, precise diagnosis and proper treatment planning is crucial for successful treatment of chondroblastoma.     

Chondroblastoma of the Temporal Bone Associated with a Persistent Hypoglossal Artery

A case of a chondroblastoma of the skull-base associated with a persistent hypoglossal artery (PHA) is presented. Neuroradiological findings of the PHA and the tumour are reported. The existence of a carotico-basilar communication such as a PHA should be recognized prior to skull base surgery because of the potential risk of cerebral ischemia.     

Surgical treatment and outcomes of temporal bone chondroblastoma

Chondroblastoma is an uncommon primary benign bone tumor that usually arises in the epiphyses of the long bones. Temporal bone chondroblastoma is a rare primary bone tumor that affects the floor of the middle cranial fossa and temporomandibular joint (TMJ). The biological nature of temporal bone chondroblastoma is occasionally aggressive because of local invasion and is known to have a high recurrence after curettage. Therefore, complete resection is recommended. However, the literature provides little information regarding long-term surgical outcomes and complications after surgical resection. The authors have retrospectively analyzed four cases of temporal bone chondroblastoma that had been completely excised by a single surgeon with an eventual long-term follow-up. A single surgeon operated on four patients, two males and two females, with a mean age of 34 years, at the Department of Otorhinolaryngology, Severance Hospital. In all cases, the tumor involved the middle cranial fossa dura and the mandibular fossa with variable degree of infiltration. All patients have had no tumor recurrence to date (mean follow-up period of 5 years). Complete surgical resection of the temporal bone chondroblastoma is the gold standard for treatment. Precise preoperative image evaluation of tumor extension and proper management of the dura mater and temporomandibular joint (TMJ) are the major important features in complete surgical removal that minimize complications in temporal bone chondroblastoma treatment.     

The magnetic resonance imaging appearance at 1.5 Tesla of cartilaginous tumors involving the epiphysis

Three cases of lytic, calcified epiphyseal lesions with plain film and computed tomography features suggestive of chondroblastoma were imaged by magnetic resonance imaging. Histopathologic correlation was obtained in each case. Two cases of chondroblastoma showed low signal intensity on both short (TR600/TE20ms) and long (TR2500/TE80ms) spin echo (SE) images. The third case, a clear cell chondrosarcoma, demonstrated increased signal intensity on moderately T2 weighted (TR2500/TE40ms) images. These findings suggest that magnetic resonance imaging may be helpful in distinguishing these lesions.     

软骨母细胞瘤合并动脉瘤样骨囊肿1例

患者男,24岁,以“右髋部酸痛半年,摔伤后疼痛2h”为主诉入院,继往半年前出现右股骨大粗隆部酸痛,以活动性为明显,休息可缓解,未就诊治疗,因2h前不慎扭伤后感觉右髋酸痛难忍,行走困难,遂就诊我院。既往体健,否认肺结核及肝炎等传染疾病史,有青霉素过敏史。查体:右髋部未见明显肿胀,未见瘀血、瘀斑,右股骨大粗隆部压痛( ),叩击痛( ),右髋部活动因患者疼痛无法配合检查,右下肢末梢血运良好,皮肤感觉无明显异常,四肢肌力、肌张力、感觉均正常。X线平片及多层螺旋CT扫描示右股骨大粗隆部一椭圆形低密度骨质破坏区,长轴与骨干一致,大小约6.8cm×…     

A trapdoor procedure for chondroblastoma of the femoral head: a case report

Chondroblastoma located in the femoral head is one of the locations accounting for frequent recurrence. One of the reasons for this is the difficulty in obtaining appropriate surgical access to it for adequate removal of tumors. The authors present and illustrate a trapdoor procedure for the surgical treatment of chodroblastoma in the epiphysis of the femoral head. The surgical approach was made over the great trochanter and a trochanteric osteotomy was performed. The capsulotomy was made anteriorly and posteriorly, and the hip was dislocated anteriorly. Using a scalpel and an osteotome, the edges of a trapdoor segment were sharply dissected and the rectangular segment was lifted back to reveal an underlying subchondral tumor. The tumor tissue was thoroughly curetted and autologous cancellous bone was grafted. The trapdoor was replaced without any additional fixation, and the femoral head was reduced. The patient recovered good hip function without pain, and showed no recurrence of chondroblastoma at 5 years after surgery. The trapdoor procedure enabled sufficient access to complete curettage and autologous cancellous bone grafting for the chondroblastoma of the femoral head. This procedure proved to be a useful surgical approach for the treatment of chodroblastoma in the epiphysis of the femoral head in this case.     

Chondroblastoma of the femoral diaphysis: report of a rare phenomenon and review of literature

Chondroblastoma (CB) is a relatively rare yet well-studied benign neoplasm of bone. The purported neoplastic cell is the chondroblast, a cell which normally populates areas of secondary ossification. Numerous studies have shown that CB overwhelmingly arises from the epimetaphyseal region of skeletally immature individuals. Only rare cases have been reported in the diaphyseal region, and many of these involve metacarpals or metatarsals, which may lack a true anatomic diaphysis. The remaining cases of diaphyseal CBs synchronously involve the neighboring epimetaphysis, making determination of the initiation point impossible. We report a case of a CB isolated to the radiologic femoral diaphysis. To our knowledge, this is the first case of a diaphyseal-based CB to be reported in the pathology literature and only the second case published overall.     

少见部位软骨母细胞瘤的影像诊断

目的:探讨少见部位软骨母细胞瘤的影像学表现及其临床诊断价值。方法:回顾性分析经病理证实的7例少见部位软骨母细胞瘤患者的病例资料。肿瘤位于距骨2例、跟骨2例、髌骨、坐骨结节及耻骨下支各1例。行X线平片检查7例,CT平扫4例,MRI平扫及增强检查4例。结果:X线平片示膨胀性骨质破坏5例,囊状骨质破坏1例,灶周硬化3例,病灶内小斑片状钙化1例;平片漏诊1例。4例CT均显示膨胀性骨质破坏,灶周硬化,病灶内斑点状或小斑片状钙化。MRI上病变呈膨胀性骨质破坏3例,囊状骨质破坏1例,4例病灶信号均混杂,灶周均可见低信号线状影及明显的骨髓水肿。结论:少见部位软骨母细胞瘤具有膨胀性骨质破坏及灶周骨髓水肿明显的特点,平片、CT和MRI三种检查方法联合应用对本病的诊断及鉴别诊断有重要价值。     

Chondroblastoma: A clinical and radiological study of 104 cases

The clinical and radiographic findings in 104 patients with chondroblastoma are presented. Pain was an almost constant presenting complaint, often accompanied in the case of para-articular lesions by impaired function of an adjacent joint. The majority (80%) were in long bones with a mean age of presentation of 16 years. The characteristic radiological image of these lesions was an eccentric radiolucency, having a sharply defined sclerotic margin and containing areas of calcification in approximately a third of cases. They were always related to a growth plate. Nearly half were confined to the affected epiphysis or apophysis itself, but most of the remainder had traversed the growth plate to involve also the adjacent metaphysis. The bones around the knee and the proximal ends of the humerus and femur were the sites of predilection. A minority (20%) affected flat bones and short tubular bones of the hand and foot, with a peculiar affinity for the calcaneus and talus. The mean age of presentation of these was 28 years. The radiological pattern was similar, except for a greater tendency to expand the affected bone. Complications included the formation of a secondary aneurysmal bone cyst in 16 cases (10 of them in long bones), one malignant chondroblastoma, and one fibrosarcoma developing after radiation of the original chondroblastoma.