Does osteoid osteoma show on MRI?
Results: In six of the nine patients (66.6%) MRI showed evidence suggestive of osteoid osteoma, comparable that seen on CT scan. In three patients (33.3%), MRI showed a nonspecific and ill-defined bone marrow signal abnormality.
Can osteoid osteoma be misdiagnosed?
Osteoid osteoma (OO) is a common benign bone tumour that is rarely found in the talus. Its nidus is difficult to detect on early imaging. The atypical symptoms of OO and the presence of concurrent trauma or sports injuries may lead to misdiagnosis and delayed treatment.
Which imaging modality is best for detection of osteoid osteoma?
CONCLUSION: CT remains the best imaging modality for diagnosis of osteoid osteoma. MR images should not be interpreted without reference to plain radiographs and CT scans if serious errors in diagnosis are to be avoided.
What is the difference between osteoid osteoma and osteoblastoma?
Histologically, osteoid osteoma and osteoblastoma are similar, containing osteoblasts that produce osteoid and woven bone. Osteoblastoma, however, is larger, tends to be more aggressive, and can undergo malignant transformation, whereas osteoid osteoma is small, benign, and self-limited.
What is nidus in osteoid osteoma?
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.
Is osteoid osteoma common?
Osteoid osteoma is a common benign tumor that usually develops in the long bones of the leg — the femur (thigh bone) and tibia (shin bone) – but can occur in any bone. In 7-20 percent of cases, osteoid osteoma occurs in the spine.
Is osteoid osteoma painful?
Osteoid osteomas tend to be painful. They cause a dull, achy pain that can be moderate to severe. The pain is often worse at night.
Is osteoblastoma malignant?
Although osteoblastoma is considered a benign tumor, there have been very rare cases in which an osteoblastoma has transformed into a malignant (cancerous) tumor.
What are the signs and symptoms of osteoblastoma?
Symptoms of osteoblastoma include:
- Sustained pain (which is less likely to respond to over-the-counter common pain relievers like Tylenol or ibuprofen)
- Swelling and tenderness.
- Pinched nerve (nerve compression) in the spine.
What are the MR imaging features of spinal osteoid osteoma?
Characteristic MR imaging features of spinal osteoid osteoma are a nidus in the neural arch and bone marrow edema in the involved pedicle and lamina that extends to the posterolateral vertebral body ( 29 ). Osteoid osteoma of the lumbar spine in a 22-year-old man.
Is MRI or CT more effective for the diagnosis of osteoma?
Recent studies have shown that MR imaging performed with techniques to increase spatial resolution and contrast enhancement may be equally as effective as or more effective than CT for detecting medullary osteoid osteoma (13).
What is osteoid osteoma of the femur?
Osteoid osteoma is a small benign bone tumor that is commonly located (in 20% of cases) in the upper third of the femur [ 1, 2 ]. It is usually found in young patients who present with pain that worsens at night and that may be relieved by the use of nonsteroidal antiinflammatory drugs [ 1 ].
Are osteoid osteomas cortical lesions?
Furthermore, osteoid osteomas are usually cortical lesions but they can occur anywhere within the bone including medullary, subperiosteal (most commonly in the talus), and intracapsular 2. In intracapsular osteoid osteomas, periosteal reaction may be distant from the lesion itself 9.