Osteoid osteoma of the vertebral body: an unusual localization (original) (raw)

Osteoblastoma and Osteoid Osteoma

Clinical Nuclear Medicine, 2009

Osteoblastoma (OB) and osteoid osteoma (OO) are benign boneforming tumors frequently involving vertebrae and long bones of the extremities. Because of their similar histopathological features, distinction between OB and OO is mostly based on size criteria. CT and MRI represent the cornerstone of noninvasive diagnostic procedures, as they provide excellent morphologic details and often obviate the need for confirmatory biopsy. Bone scan is a complementary, highly sensitive functional technique particularly useful for detection of vertebral OO. F-18 FDG PET/CT could have potentiality in diagnosis and post therapeutic evaluation of patients with OB and OO. We report MRI and dynamic F-18 FDG PET/CT results obtained before radiofrequency or laser ablation from 3 patients with an OB of the right L5 pedicle, an OB of the left talus and an OO of the right acetabulum. Both patients with OB underwent posttherapeutic evaluation to confirm the effectiveness of percutaneous radiofrequency ablation.

Osteoid osteoma in the thorasic spine

Turkish neurosurgery, 2009

Osteoid osteoma is a benign skeletal neoplasm composed of osteoid and woven bone. The majority of the lesions arise in the cortex of long bones. Osteoid osteoma of the spine is a rare primary spine tumor and those located at the thoracal spine are even rarer. The usual treatment involves complete resection, including the nidus, or alternatively radiofrequency percutaneous ablation is performed. The authors present a 32-year-old female with an unusual localization of the osteoid osteoma in the thoracal spine where imaging modalities were not conclusive for the diagnosis. The T1 vertebra lesion was successfully resected via a posterior approach with T1 laminectomy, including right side C7 and T1 foraminotomies, and vertebroplasty were performed. Histopathology reported the lesion as an osteoid osteoma.

Osteoid osteoma—osteoblastoma

Cancer, 1974

I n view of the clinical and pathological similarities, osteoid osteoma and osteoblastoma can be considered variants of one benign osteoblastic process. We suggest classifying these lesions according to their location in the bone, for that location determines the nature of reaction evoked. For lesions arising within compacta, we suggest the name cortical osteoblastoma (synonymous with osteoid osteoma). For lesions arising in the spongiosa, we propose the term spongious osteoblastoma (synonymous with benign osteoblastoma). A series of 24 cases is reviewed. Eleven were of the cortical type, characterized by a striking perifocal bone reaction with nidus size averaging 1.3 cm. Thirteen were classified as a spongious osteoblastoma, with slight or no perifocal bony reaction. Frequently the nidus showed calcification and a thin ring of sclerotic-appearing trabeculae. The nidus size averaged 2.5 cm. T h e cortical type was more frequent in the diaphysis of long bones while the spongious type was more common in the spine, metaphyses, and short bones.

Radiological Features of Osteoid Osteoma: Pictorial Review

Iranian Journal of Radiology, 2011

Osteoid osteoma is a benign bone tumor of undetermined etiology, composed of a central zone named nidus which is an atypical bone completely enclosed within a wellvascularized stroma and a peripheral sclerotic reaction zone. There are three types of radiographic features: cortical, medullary and subperiosteal. Forty-four patients with osteoid osteoma were studied retrospectively. In plain films, 35 patients presented as the cortical type, six cases were located in the medullary zone and three had subperiosteal osteoid osteoma. In all the cases, the nidus was visualized on computed tomography (CT) scan. The nidus was visible in four out of five patients who had also undergone magnetic resonance imaging (MRI). Double-density sign, seen on radionuclide bone scans was positive in all patients. MRI is more sensitive in the diagnosis of bone marrow and soft tissue abnormalities adjacent to the lesion, and in the nidus that is located closer to the medullary zone. On the other hand, CT is more specific when it comes to detecting the lesion's nidus.

Unusually located osteoid osteomas

European Journal of Radiology, 1995

The files of 12 patients (aged 12-33 years) with an equal number of surgically proven osteoid osteomas (OOs) were reviewed in attempt to find a diagnostic algorithm in cases of unusually located OOs. Plain radiography (PR) and thin collimation computed tomography (CT) had been performed in all patients, while bone scintigraphy (BS) had been performed in eight and magnetic resonance imaging (MRI) in two. The OOs were located at juxta-or intra-articular sites, except for one located at the left neck of the L4 vertebra. The diagnosis based on the MRI examinations was synovitis. BS showed increased accumulation of the radioisotope at the site of the lesions, without the 'double density' sign. PR showed the nidus of OO in only six patients, whereas CT located the nidus in all patients. In conclusion, we believe that when an OO is clinically suspected at an unusual location, CT should be performed in all cases, even when a lesion is depicted by PR and BS, because CT will not only locate the nidus but will also provide a precise anatomy of the area around the nidus and help in therapeutic decision making and surgical planning. MRI can be misleading and must not be used in the initial assessment of a possible osteoid osteoma.

Osteoid Osteoma of Cervical Spine: A Case Report and Review of Literature

Journal of Orthopaedic Case Reports, 2019

Introduction: Osteoid osteoma of cervical spine is a rare clinical entity and accounts for 4% of cases of overall spinal osteoid osteoma. It has predilection for neural arch and complete resection is difficult task due to proximity to important neurovascular structures. Incomplete resection leads to recurrence in about 4.5% of patients. Computed tomography (CT)-based navigation may aid in resection of tumor without compromising stability, but whenever it inevitable fusion is mandatory. Case Report: We report two cases of osteoid osteoma of cervical spine managed with surgical excision. Case1 had recurrence of tumor at the left C6 pedicle after minimally invasive intervention that was later managed by surgical excision with the help of CT-guided navigation. Case 2 had osteoid osteoma of the right C4 lateral mass that was treated with surgical excision and fusion. Conclusion: Osteoid osteoma is a rare pathology in cervical spine. Surgical excision of cervical osteoid osteoma is a daun...

An exceptional localisation of osteoid osteoma

The Internet Journal of …, 2008

Osteoid osteoma is a small tumor, always benign. Located preferentially on the long bones, femur and tibia, elbow location is rare. We present a case of an Osteoid osteoma in unusual subperiostal localization in the tip of the coronoid process. The lesion was removed by en bloc resection under CT-guidance. This approach enabled us to avoid damaging the proximal structures, to examine the lesion, and to fill the bony defect with autologus bone-graft. This presentation marks the first case reported in this precise subperiostal localization.

Radiological Imaging Findings of a Case with Vertebral Osteoid Osteoma Leading to Brachial Neuralgia

Journal of Clinical Imaging Science, 2013

Osteoid osteoma is a small, benign osteoblastic tumor consisting of a highly vascularized nidus of connective tissue surrounded by sclerotic bone. Three-quarters of osteoid osteomas are located in the long bones, and only 7-12% in the vertebral column. The classical clinical presentation of spinal osteoid osteoma is that of painful scoliosis. Other clinical features include nerve root irritation and night pain. Osteoid osteoma has characteristic computed tomography (CT) findings. Because magnetic resonance imaging (MRI) findings of the osteoid osteomas causing intense perinidal edema can be confusing, these patients should be evaluated with clinical findings and other imaging techniques. In this study, we present X-ray, CT, and MRI findings of a case with osteoid osteoma located in thoracic 1 vertebra left lamina and transverse process junction leading to brachial neuralgia symptoms.