Cementoblastoma, osteoid osteoma
, cemento-osseous lesions, adenomatoid odontogenic tumor, calcifying epithelial odontogenic tumor, and ameloblastic fibro-odontoma were also considered in the differential diagnoses.
Number and percentage of each pathology Pathology details n % Simple bone cyst 2 3.2 Recurrent ameloblastoma 1 1.6 Osteosarcoma 6 9.7 Osteoid osteoma
1 1.6 Osteochondroma 3 4.8 Multiple myeloma 4 6.5 Metastases 4 6.5 Marrow edema 2 3.2 Lymphoma 4 6.5 Lipoma 1 1.6 Langerhans cell hystocystosis 1 1.6 Inflammatory 4 6.5 Hemangioma 2 3.2 Fibrous dysplasia 1 1.6 Fibrous cortical defect 2 3.2 Ewing sarcoma 16 25.8 Enchondroma 2 3.2 Chondrosarcoma 3 4.8 Chondromyxoid fibroma 1 1.6 Aneurysmal bone cyst 2 3.2 Table 2.
Infiltrative intraosseous lipomas in birds should be distinguished from other lytic bone tumors, including giant cell tumors, (14) air sac cystadenocarcinoma, (15) soft tissue sarcoma, (16) osteoma
aneurysmal bone cyst, (18) traumatic bone cyst, (4) and ossifying fibromas, (19) as well as infectious conditions including mycobacteriosis or salmonellosis (20) and metabolic conditions such as nutritional hyperparathyroidism.
On axial T2 sequences, there was a small round dark lesion in the dorsal aspect of the proximal metacarpal, thought to be a nidus and consistent with a diagnosis of osteoid osteoma
. As the patient continued to have pain in the first webspace and second metacarpal, he was referred to Interventional Radiology for treatment.
Surgical removal resulted in partial recovery of facial function (House-Brackmann grade IV to II), but the stapes was removed along with the osteoma
, and postoperative hearing status was not reported.
Mostly these tumours are asymptomatic and hardly impose a difficulty in treating and therefore their incidence is debatable.3 World Health Organisation (WHO) has described a nomenclature for tumours and classifies them into seven different categories.3 Group I comprises bone-forming tumours such as osteoma
, osteoid osteoma
, and osteoblastoma.
(OO) is a benign osteoblastic tumor that was first described as a separate entity by Jaffe in 1935 .
Computed tomography (CT) of the paranasal sinuses revealed an extensive osteoma
of the left ethmoid sinus and left nasal passage (figure, B).
mucocoele, nasopharyngeal angiofibroma, osteoma
, lymphangioma, haemangioma, pituitary tumours, internal carotid artery aneurysm, fibrodysplasia) and malignant sphenoid lesions (although they have not yet been reported in this age group, but considerations would be lymphoma, rhabdomyosarcoma, Ewings sarcoma).
The pneumocephalus, as discovered after the MRI, was caused by an osteoma
, or a benign bone tumor that formed in the patient's sinuses and was eroding through the base of his skull.
Clinically and histopathologically, calvarial hyperostosis may occasionally be confused with osteoma
since it is a localized bone growth.
is a benign bone tumor, which represents approximately 10% of all benign bone tumors.