[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.

Primary laryngeal tuberculosis mimicking laryngeal carcinoma: CT scan features.

Laryngeal tuberculosis is a rare disease. It is almost always associated with pulmonary tuberculosis. It occurs generally in adults without BCG vaccination or in cases of the acquired immune deficiency syndrome. On laryngoscopy and imaging, it often simulates laryngeal carcinoma, and confirmation is always histological. We report the case of a 36-year-old man who presented to our hospital with dysphonia and dysphagia. Laryngoscopy revealed a lesion of the left vocal cord and the ventricular strip. CT scan found focal, regular thickening of the left vocal cord, associated with irregular thickening of the posterior laryngeal wall. A biopsy confirmed the diagnosis of tuberculosis.

Magnetic resonance imaging for spinal cord tumors. A report of twenty cases.

This paper discusses spinal cord tumors including imaging characteristics with emphasis on magnetic resonance imaging and advances in treatment. This is a retrospective study of 20 cases patients with neoplasms arising from the spinal cord. All of our cases were explored by magnetic resonance imaging (1.5T) using T1-weighted imaging (Spin Echo), T2-weighted imaging (Spin Echo) and T1-weighted imaging with Gadolinium administration. Pain is the earliest symptom, characteristically occurring at night when the patient is supine. Ependymoma were observed in 11 cases. Astrocytoma was noted in five cases. Other uncommon tumors were identified in four cases: oligodendroglioma (n=1), epidermoid cyst (n=1), hemangioblastoma and metastasis (n=1). In MRI most tumors are isointense or slightly hypointense compared to the normal cord signal with homogenous or irregular enhancement. We describe the characteristic magnetic resonance findings and differential diagnosis of spinal cord tumors. Spinal cord lesions comprise approximately 2-4% of all central nervous system neoplasms. Magnetic resonance imaging plays a central role in the imaging of spinal cord neoplasms.

[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.

[Tumor of the maxilla presenting as primary hyperparathyroidism]. / Tumeur maxillaire révélant une hyperparathyroïdie primitive: à propos d'un cas.

Brown tumors are classic bony lesions of hyperparathyroidism. They usually occur in severe forms with osteolytic subperiosteal lesions. Facial bones are a rare localization: 2% of all cases. The aim of this study was to report a case of multiple craniofacial location of brown tumors and to discuss, within a review of the literature, the role of imagery in the diagnosis of this disease.

[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.

[Occipital osteosarcoma of a 33 years old man: a case report]. / Ostéosarcome occipital chez un homme de 33 ans: à propos d'un cas.

Cranial localization of osteosarcoma is rare, representing only 0,7-3% of cranial primary tumours. The authors present the case of a 33 year old man with occipital osteosarcoma diagnosed by CT scan, MRI and angiography. The radiological features of this pathology are discussed.