21/24. Case report: isolated neurofibrosarcoma of the liver: US, CT and MR findings. Neurofibrosarcomas are rare neoplasms usually associated with von Recklinghausen's disease. In this paper we describe ultrasound (US), computed tomography (CT) and magnetic resonance (MR) appearances of an unusual isolated neurofibrosarcoma of the liver. ( info) |
22/24. Neurosarcoma of the face: MRI. Neurosarcoma is a rare tumour originating from the sheath of peripheral nerves. Facial lesions have been reported in about 20 patients. We describe the MRI appearances of neurosarcoma with histological correlation in three patients. The lesions lay in the submandibular region, the left parapharyngeal space and the right orbit. MRI showed a well-defined mass with mixed components. The lesions were moderately heterogeneous on T1-weighted images in two cases and on T2-weighted images in all cases. gadolinium enhancement occurred in all cases to variable degrees. In two cases, small high signal foci were seen on T2-weighted sequences. MRI appearances of neurosarcoma are not specific. ( info) |
23/24. 99mTc MIBI in neurofibromatosis imaging diagnosis: case report. 99mTc MIBI has been shown to accumulate in different cancer cells types, in vitro and malignant tumours in vivo, making evidence of the scintigraphic diagnostic of them. We report two cases of neurofibromatosis type I, which has realised high levels of 99mTc MIBI uptake, primary to all chemo- or radiotherapy. Only certain zones of tumorous localisation have been seen, but a relation with the lesion histology was not really established. In conclusion, 99mTc MIBI scintigraphy may be usefull in the investigation of type I neurofibromatosis. ( info) |
24/24. Multiple intracerebral metastases of a 17-year-old girl with previously diagnosed neurofibromatosis type I. We report a case of a 17-year-old girl with multiple intracerebral tumors. Previously, a neurofibroma in the posterior mediastinum and neurofibromatosis had been diagnosed. She developed a spastic tetraparesis with a prominent hemiparesis of the right side within several weeks. On admission we found clinical signs of elevated intracranial pressure. Cranial CT and MRI scans showed multiple space-occupying intracerebral tumors, thought to be multiple meningeoma. The patient was referred to the neurosurgical department, where two of the intracerebral tumors were excised. The histological examination revealed metastases of a neurosarcoma. ( info) |