Osteochondromas are common benign bone tumors. Synovial chondromatosis is a benign cartilaginous metaplasia that occurs in the synovium. The authors describe a unique case of synovial chondromatosis developing in the pes anserine bursa secondary to an underlying osteochondroma of the proximal medial tibia. It is unusual to see both of these processes occurring simultaneously in 1 location. Afte...

INTRODUCTION Meniscal cysts are rare, in that cysts of lateral meniscus are 3 times to 10 times more common than those of medial meniscus. Etiology of meniscal cysts includes trauma which results in contusion and haemorrage within the substance of meniscus leading to mucoid degeneration. Degeneration with age results in local necrosis and mucoid degeneration into a cyst, developmental inclusion...

A case of squamous cell carcinoma arising from a solitary benign nonparasitic hepatic cyst (SBNHC) causing bile duct obstruction is presented. A review of the literature regarding SBNHC suggests that, although these lesions may appear benign, they may also undergo metaplastic and subsequent malignant transformation. This appears to be particularly true when the SBNHC is lined with squamous epit...

Ganglions (synovial cysts) are cystic or semicystic lesions found most commonly in the wrist, dorsum of the foot, or knee. They mayor may not be continuous with the joint space and mayor may not have a synovial lining [1]. Some authors make a distinction between gang I ions and synovial cysts, the latter being synovial-lined. Recently, several studies have reported the identification of synovia...

To cite: Yildirim D, Tutar B, Bas A, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2013008732 DESCRIPTION Synovial cysts of the cervical spine are extremely rare. We describe a case concerning a 57-year-old woman who presented with uncertain cause of odontoid fracture, resulting in a cystic lesion compressing the upper cervical spinal cord. She had a hist...

Synovial sarcoma is an uncommon, aggressive malignant tumor of the soft tissues primarily involving the extremities of young adults. Head and neck synovial sarcoma is rare, and its diagnosis and therapy are still challenging.We report a case of a young patient with synovial sarcoma, clinically masquerading as cystic mass of the neck and malignant second branchial cleft cyst. The pathological di...

Metaplastic tumors are rare and represent a heterogeneous group of neoplasms showing dominant areas of non-glandular differentiation. Etiology and pathogenesis of this type of lesion in the breast is uncertain. The most common sources of metastatic squamous cell carcinoma of the breast are lung, esophagus, cervix, and urinary bladder. Squamous cell carcinomas may present clinically with inflamm...

Extra skeletal soft tissue chondroma is a very rare, slow progressing, benign tumor. It has a specific tendency for hands and feet. It can sometimes be misdiagnosed as a synovial cyst or a more serious condition such as synovial sarcoma. Moreover, it can exhibit worrying radiologic and histological features mimicking chondrosarcomas. This study presents a very rare case of soft tissue chondroma...