[Aneurysmal cyst of ethmoid bone: a case report]. / Le kyste osseux anévrismal de l'ethmoïde : à propos d'un cas.

AIM: To report on the value of imaging in the diagnosis and assessment of aneurysmal cyst of the ethmoid bone. CASE: A 12-year-old girl with a stuffy nose, revealing an aneurysmal bone cyst of the ethmoid, explored by CT, MRI, who had a preoperative arteriography with embolization. CONCLUSION: Aneurysmal bone cyst is a benign bone lesion which rarely involves the facial bones. Imaging plays an important role in the diagnostic approach, the assessment of the lesions, and the treatment using the techniques of interventional radiology.

A rare localization of meningioma: meningioma of the foramen of Monro.

Intraventricular meningiomas (IVM) are rare tumors, constituting only 0.5 to 2% of all intracranial meningiomas, and meningiomas localized within the foramen of Monro are exceptional, with only a very few cases reported in the literature. We report the case of a 41-year-old man, admitted to our department for headaches. MRI found a mass tissular well enhanced after gadolinium injection, arising in the region of the foramens of Monro, and extended to the lateral and the third ventricles. Histological examination revealed a meningioma.

[Primary hydatid cyst of the parotid gland]. / Kyste hydatique parotidien primitif.

INTRODUCTION: The hydatid cyst is an anthropozoonosis due to the development of the Echinococcus granulosus tapeworm larva in humans. Its intraparotid localization is extremely rare. CLINICAL CASE: A 10-year-old-male patient was admitted for an isolated renitent swelling of the left parotid region having grown for several months. Cervical ultrasonography revealed a left parotid cystic mass, characterized by a double wall, and a small daughter cyst. The CT-scan typically showed the absence of enhancement after iodine contrast medium injection. The imaging-based diagnosis of a hydatid cyst was supported by positive hydatid serology, and confirmed by histological analysis of the cyst. No other hydatid location was found (chest and abdominal). DISCUSSION: In spite of its rarity, hydatid cyst can be a diagnosis in case of parotid cystic masses. Ultrasonography is the first examination to be performed; it must be completed by CT-scan or even better by MRI. Once the diagnosis of hydatid cyst is confirmed, a chest radiograph and an abdominal ultrasonography should be performed, to screen for other localizations. Surgical resection is the gold standard treatment.

[Os odontoideum: clinical and radiological aspects]. / Os odontoïdeum : aspects cliniques et radiologiques.

Few reports of os odontoideum have been made. We report two cases where this affection was revealed by cervical pain and hemiparesis in one case and acute tetraparesis in the other. Patients with os odontoideum usually present with neurological signs, but some have only cervical pain and some others remain asymptomatic. Radiological exams, including radiograms, cervical scanner and MRI lead to the diagnosis. Different surgical treatment can be proposed to symptomatic patients. Prophylactic surgical treatment is not indicated.

[Maffucci syndrome: an historical case]. / Le syndrome de Maffucci: à propos d'un cas historique.

We report a case of Maffucci syndrome in a 24-year-old patient, diagnosed thanks to the data of the clinical examination, the imagery and the histology. The clinical, radiological and evolutionary aspects are discussed, as well as the various therapeutic means.

[Kahler's disease presenting with a solitary cranial vault plasmacytoma]. / Maladie de Kahler révélée par un plasmocytome solitaire de la voûte.

INTRODUCTION: Solitary plasmocytoma is rarely located in the cranial vault. Usually observed, in elderly patients, occurrence during adolescence is extremely rare. We report the case of a 16-year-old patient presenting a cranial vault solitary plasmocytoma which revealed Kahler disease. CASE REPORT: A 16-year-old patient consulted for a frontal tumefaction becoming painful with diplopia. The cranio-encephalic radiography and the MRI showed a tumoral process involving cranial vault; biopsy revealed a solitary plasmocytoma. Search for multiple myeloma was negative. Six months later, a disease of Kahler was declared. CONCLUSION: Clinical and biological follow-up of cranial plasmocytoma is necessary, because progression to multiple myeloma is possible as in our observation. Imaging and particularly MRI are needed to specify the axial seat of the tumoral process and its relationship with the nervous and vascular structures.

[Neuro-imaging of tuberous sclerosis]. / Neuro-imagerie de la sclérose tubéreuse de Bourneville.

Tuberous sclerosis is a phakomatosis with central nervous system manifestations characterized by 4 lesions detectable on neuro-imaging: tubers, white matter abnormalities, subependymal nodules and subependymal astrocytomas. The first three are benign lesions composed of by identical cytological lesions varying only in size and location. At CT, enhancement of subependymal nodules is usually considered as evidence of transformation to subependymal giant cell astrocytoma. This latter poses the problem of its relative benignity: hydrocephalus source of morbidity or even mortality. From a series of 22 cases, the authors review the characteristics of these abnormalities.

[Intracranial textiloma]. / Textilome intracrânien.

The authors report a case of intracranial textiloma in a 36-year-old male diagnosed 3 years after surgery for a left spheno-orbital meningioma.