ABSTRACT
OBJECTIVE: To describe the imaging features of primary bilateral coronoid hyperplasia, with particular reference to the use of CT and MRI. MATERIALS: A series of five cases is reviewed. RESULTS: The correct diagnosis was achieved with panoramic radiography alone or with the addition of CT. MRI did not provide additional pre-operative information; it was useful in the postoperative assessment of poor functional recovery in order to determine the presence of haematoma and/or fibrosis. CONCLUSIONS: Although panoramic radiography alone can demonstrate this condition, CT has an important role in diagnosis and is useful for an adequate surgical planning by allowing assessment of the size of impingement of the coronoid processes. MRI is useful for evaluating postoperative complications involving soft tissue.
Subject(s)
Hyperostosis/diagnosis , Mandibular Diseases/diagnosis , Adolescent , Adult , Humans , Hyperostosis/diagnostic imaging , Hyperplasia/diagnosis , Hyperplasia/diagnostic imaging , Magnetic Resonance Imaging , Male , Mandibular Diseases/diagnostic imaging , Patient Care Planning , Radiography, Panoramic , Tomography, X-Ray ComputedSubject(s)
Aorta, Thoracic/abnormalities , Esophageal Stenosis/etiology , Pulmonary Artery/abnormalities , Trachea/pathology , Tracheal Stenosis/etiology , Bronchoscopy , Diagnostic Imaging , Fatal Outcome , Female , Heart Defects, Congenital/complications , Humans , Infant , Male , Respiratory Function Tests , Respiratory Sounds/etiologyABSTRACT
Ultrasonography (US) is the choice morphological imaging modality in the study of thyroid carcinomas. The present technological evolution (high frequency probes, development of Colour-Doppler) allows the detection of small non-palpable nodules, being able to define, in a high percentage of cases, features pointing to the malignant character of a thyroid mass, although the definite assessment of malignancy (invasion of adjacent structures, metastatic cervical nodes) is quite rare. From a diagnostic viewpoint US is required to identify nodules with suspect features, to be submitted to fine needle aspiration biopsy. Moreover, US plays a basic role in the staging--at the cervical level--of carcinomas as well as in the post-operative follow-up. The other imaging modalities (Computed Tomography, Magnetic Resonance Imaging) play a limited role in both staging and post-operative follow-up.
Subject(s)
Magnetic Resonance Imaging , Thyroid Neoplasms/diagnosis , Tomography, X-Ray Computed , Ultrasonography, Doppler, Color , Follow-Up Studies , Humans , Postoperative Care , Thyroid Neoplasms/diagnostic imaging , Thyroid Neoplasms/surgery , Time FactorsABSTRACT
The authors present a case of osteoid osteoma (O.O.) localized in the ischiatic ramus, a very rare (incidence varying from 1.2% to 2.7% in the literature) site for this lesion. Of all the diagnostic tests used, including conventional radiography and Computerized Axial Tomography (CT), the information provided by Magnetic Resonance Imaging (MRI) was particularly valuable. MRI permits recognition of the "nidus" of the osteoid osteoma, which usually emits an intermediate signal on T1-"weighted" images, and is more sensitive than conventional radiography or CT, especially when the marked sclerotic reaction around the tumor renders diagnosis with these last two methods difficult.
Subject(s)
Bone Neoplasms/diagnosis , Ischium , Magnetic Resonance Imaging , Osteoma, Osteoid/diagnosis , Bone Neoplasms/pathology , Child , Humans , Male , Osteoma, Osteoid/pathologyABSTRACT
Thirty-four temporomandibular joints (TMJ) were examined in 17 normal subjects with two superconductive MR units at 1T and 1.5T. TMJ evaluation was performed with both SE sequences in occlusal position and with "fast" sequences (flash) during the gradual opening of the mouth. Therefore, both the anatomic features of the TMJs and their dynamic behavior during mouth opening were analyzed. The information acquired allowed the complete and non-invasive evaluation of TMJ function. The knowledge of the normal anatomic and functional patterns is of paramount importance for the diagnostic approach to TMJ pathologic conditions.
Subject(s)
Magnetic Resonance Imaging , Temporomandibular Joint/anatomy & histology , Adult , Humans , Temporomandibular Joint/physiologyABSTRACT
A 13-year-old female presented after repeated trauma with pain of the distal end of the thigh. The findings on plain films, bone scan, and CT were indeterminate. MRI accurately demonstrated a fracture line with bone marrow edema, suggesting the diagnosis of stress fracture. MRI patterns of stress fracture were considered and the importance of establishing the correct diagnosis was emphasized.
Subject(s)
Femoral Fractures/diagnosis , Femoral Neoplasms/diagnosis , Fibroma/diagnosis , Fractures, Stress/diagnosis , Adolescent , Diagnosis, Differential , Diagnostic Imaging , Female , HumansABSTRACT
The aim of this study is to analyze with MRI the normal anatomy of TMJ in 12 volunteers from 30 to 35 years old. The anatomical components are described in order to provide the information for their functional evaluation with MRI. MRI is thought to be the most helpful examination in the clinical analysis of both normal and pathologic TMJ.