Osteochondromas are common and typically arise from the metaphyseal ends of long bones. An osteochondral neoplasm of the soft tissue, which is a lesion of uncertain pathogenesis, is uncommon and usually arises from the synovial tissue in joints and tendon sheaths. Rarely, extraskeletal osteochondromas also arise outside of synovial compartments. Most of the reported cases were presented in the hands and feet, especially in the fingers. Here we describe a 44-yr-old female patient who presented with a pain in the left buttock. A well-defined osseous mass was detected in the buttock. It consisted of sharply demarcated, mature hyaline cartilage that was covered with a fibrous capsule, which changed gradually into cancellous bone, more pronouncedly at the center. The diagnosis of an extraskeletal osteochondroma should be considered when a discrete, ossified mass is localized in the soft tissues. A case of pathologically proven extraskeletal osteochondroma of the buttock is presented with a literature review, magnetic resonance imaging, and radiological findings.
Accidental Falls ; Adult ; Buttocks* ; Diagnosis, Differential ; Female ; Human ; Myositis Ossificans/diagnosis ; Osteochondroma/complications ; Osteochondroma/diagnosis* ; Osteochondroma/radiography ; Osteochondroma/surgery ; Pain/etiology ; Sarcoma/diagnosis ; Soft Tissue Neoplasms/complications ; Soft Tissue Neoplasms/diagnosis* ; Soft Tissue Neoplasms/radiography ; Soft Tissue Neoplasms/surgery

An osteochondroma is a bone tumor, but rarely occurs in the thoracic spine, especially in the pediatric population. The objective of this study was to describe the diagnosis and successful treatment of a pediatric patient with an osteochondroma of the thoracic spinous process. The anteroposterior and lateral plain radiographs illustrated a well-defined solid mass arising from the spinous process of the tenth thoracic vertebrae. Computed tomography and magnetic resonance imaging further delineated that the mass arose from the spinous process, but with no obvious impingement of the nerve roots. After excision of the lesion, the gross pathological and histological evaluations were consistent with those of an osteochondroma. This led to appropriate surgical intervention, resulting in definitive treatment.
Diagnosis ; Humans ; Magnetic Resonance Imaging ; Osteochondroma* ; Spine* ; Thoracic Vertebrae

Osteochondroma, also known as osteocartilaginous exostosis or simply exostosis, comprises about 8.5% of all primary bone tumors and about 36% of those that are benign. Osteochondromas affect mostly the long bones; only 3% of solitary osteochondromas originate in the spine, while a solitary lesion in the cervical spine is distinctly rare. We present a case of osteochondroma of the upper cervical spine, presenting as a posterior neck mass. Although rare, spinal osteochondromas should be considered in the differential diagnosis of neck masses, and surgical treatment should be undertaken to correct secondary pain, disability, neurologic deficits, or cosmetic deformities.
Congenital Abnormalities ; Diagnosis, Differential ; Exostoses ; Neck* ; Neurologic Manifestations ; Osteochondroma* ; Spine

Osteochondromas develop as cartilaginous nodules in the periosteum of bones. They are the commonest benign tumors of the skeleton, generally observed in the long bones. Rarely, they are also found in the axial skeleton, flat bones of skull and facial bones. During a regular dissection, we came across a solitary osteochondroma in posterior surface of the body of the right pubic bone. Histopathology of the bony projection confirmed the typical features of the osteochondroma. The symptomatic osteochondromas are usually evaluated during radiographic examination. Though, the observed osteochondroma is relatively smaller its unusual location is remarkable and knowledge of occurrence of such nodules is clinically important during the diagnosis and planning of treatment.
Cadaver* ; Diagnosis ; Facial Bones ; Osteochondroma* ; Periosteum ; Pubic Bone* ; Skeleton ; Skull

Adult ; Bone Neoplasms ; diagnosis ; surgery ; Cervical Vertebrae ; Humans ; Male ; Osteochondroma ; diagnosis ; surgery

The diagnosis of soft tissue osteochondroma should be considered when a well-defined osseous mass is located in the soft tissues. The differential diagnosis includes myositis ossificans, tumoral calcinosis, synovial chondromatosis, and soft tissue osteosarcoma, true osteochondroma which arises from bone. One case of soft tissue osteochondroma in the knee, a lesion of uncertain pathogenesis is reported.
Calcinosis ; Chondromatosis, Synovial ; Diagnosis ; Diagnosis, Differential ; Knee ; Myositis Ossificans ; Osteochondroma* ; Osteosarcoma

PURPOSE: To evaluate the clinical and radiographic features of unilateral hyperplastic mandibular condyles for some useful preliminary diagnostic recommendations. MATERIALS AND METHODS: Clinical records, radiographs and histologic diagnoses of 35 cases with asymmetric mandibular condyles due to apparent unilateral condylar hyperplasia were evaluated retrospectively. RESULTS: Among 35 cases, 28 were true hyperplastic conditions of condyles whereas the remaining 7 were unilateral internal derangement occurring on the short side. 17 of the 28 hyperplastic condyles showed a mass or irregular radiographic shadow with histologic diagnosis including osteochondroma and osteoma. Only 5 of these cases showed facial asymmetry. 2 out of the 17 cases showed hyperplastic round shaped irregular condyles consistent with ankylosis and their histologic diagnoses were osteochondromas. 11 of the 28 cases showed smooth enlargement of condylar head with elongation of the neck causing facial asymmetry, but histologic diagnoses were not available because the surgical operation conserved the condyles. CONCLUSION: The hyperplastic conditions of the mandibular condyles include not only true hyperplasia, osteochondroma, osteoma, and ankylosis, but also unilateral internal derangement occurring on the short side.
Ankylosis ; Diagnosis ; Facial Asymmetry ; Head ; Hyperplasia ; Mandibular Condyle* ; Neck ; Osteochondroma ; Osteoma ; Retrospective Studies ; Temporomandibular Joint Disorders

Osteochondromas are the most common benign tumors of the bone. They mostly arise from the appendicular skeleton and present clinically in the second or third decade of life. Ostechondromas arising from the subaxial cervical spine and presenting after the 5th decade of life are extremely rare. We report a 52-year-old male patient who presented with numbness and subjective weakness of left upper and lower limbs and neck pain, and had lobulated bony hard fixed swelling in the right lower cervical paraspinal region. Radiological images revealed a bony swelling arising from C4 and C5 lamina with a cartilaginous cap and intraspinal extension. Excision biopsy with stabilisation of the spine was performed. Histopathalogical examination of the specimen confirmed the diagnosis of osteochondroma. We conclude surgical excision of such rare tumors, including the cartilaginous cap as well as the intraspinal component can reliably produce a good clinical outcome.
Aged ; Biopsy ; Diagnosis ; Humans ; Hypesthesia ; Lower Extremity ; Male ; Middle Aged* ; Neck Pain ; Osteochondroma* ; Skeleton ; Spine*

Osteochondroma is the most common type of benign bone tumor, but it is unusual in the spine and they rarely present with compression of the spinal cord. We treated a male patient with a solitary osteochondroma of the thoracic spine that caused spinal cord compression. Computed tomography and magnetic resonance images demonstrated a mass arising from the T5 vertebrae, projecting into the spinal canal compressing the spinal cord. Diagnosis was confirmed by surgery and histological study of the resected specimen.
Diagnosis ; Humans ; Male ; Osteochondroma* ; Spinal Canal ; Spinal Cord Compression* ; Spinal Cord* ; Spine*

Synovial chondromatosis is an uncommon disorder characterized by metaplastic formation of multiple cartilaginous and osteocartilaginous nodules within connective tissue of the synovial membrane of joints. Osteochondroma is a benign lesion of osseous and cartilagenous origin. It is frequently found in the general skeleton, but is rare in the mandibular condyle. We experienced 2 patients with abnormal appearance of temporomandibular joint. Histologic diagnoses were not obtained, because surgery was unwarranted in view of the lack of symptoms and the benign differential diagnosis. We describes 2 cases that show the characteristics of both disease simultaneously.
Chondromatosis, Synovial ; Connective Tissue ; Diagnosis, Differential ; Humans ; Joints ; Mandibular Condyle ; Osteochondroma ; Skeleton ; Synovial Membrane ; Temporomandibular Joint