Search PubMed⌕ Search

Biomedical subjects

N Chakir

Publications and source records attributed to N Chakir.

47 records · Page 3Linked to original sources
PubMed1997

[Primary osteosarcoma of the skull. Apropos of 2 cases].

Primary tumors of the skull are rare and are estimated approximately in about 2.4% of all bone primary tumors. Primary craniofacial osteosarcoma accounts for 2 to 9% of cases in published series. The pure cranial location are estimated in the range of 0.7 to 3%. Spreading lesions to the central nervous system is uncommon, in addition plain film features are misleading due to the lock of evidence of osseous involvement of the calvaria. CT scan is more sensitive to demonstrate bone lesion as well as brain extension. MRI depict the soft tissue components even more clearly. We report two cases of skull osteosarcoma in two female patients without any preexistent affection. The particularity of these observations is that the intracranial extension presented as the brain tumor.

Adult↗
PubMed1996

[A new treatment of osteoid osteoma: percutaneous sclerosis with ethanol under scanner guidance].

Osteoïd osteoma is a benign bone tumor, easy to diagnose because of its typical presentation. However, it may be difficult in some cases: peculiar locations (spine, femoral neck...), or lack of visibility during surgery. Numerous removal technics under CT guidance have been proposed during the last few years. We will suggest another therapeutic way to treat a case of osteoïd osteoma, located in the upper extremity of the femur. The complete removal of the nidus was not possible despite two surgical attempts. So, its percutaneous sclerosis under CT guidance was accomplished, allowing the disappearance of the pain without patient immobilization afterwards. We will compare this easy and reliable method to those already described in the literature.

Adolescent↗
PubMed1996

[Cerebral vascular accidents due to hydatid embolisms. Apropos of 2 cases].

Hydatid cysts of the brain are very rare. Exceptionally, signs and symptoms are primarily those of acute cerebral ischaemia. Two cases of acute cerebral ischaemia are reported in a 21 year old and 40 year old women. A computed tomographic scan revealed a middle cerebral artery (MCA) infarct and an abrupt cutoff of the MCA at cerebral angiography. A few months later, a CT scan showed cysts in the territory of the infarct. Hydatid cysts were also found in multiple viscera, particularly in the heart. These two observations and some cases reported in the literature suggested that the myocardial cyst may have ruptured into the ventricular cavity, resulting in widespread intravascular dissemination of embryo and causing an acute cerebral infarction. The interest of these cases lies in the rarity of an acute cerebral ischaemia due to hydatid cyst embolism, and in the early diagnosis of cardiac cysts in young patients.

Adult↗
PubMed1996

[Spontaneous rupture of an intracerebral dermoid cyst].

Dermoid and epidermoid cysts are rare benign tumors arising from ectopic epiblastic inclusions. Dermoid cyst accounts for 0.4 to 1.5% of all tumors. We report the case of a 43-year-old man, who presented with a 6-month history of disturbances of balance and behavioral disorders. X-ray showed two fat-fluid levels in the ventricles. CT scan showed a left frontal mass with fat density, communicating with the left frontal horn. Histological examination after surgical excision confirmed the diagnosis of dermoid cyst. The diagnosis of ruptured intracranial dermoid cyst is based on the finding of an intraventricular and/or subarachnoid space fat-fluid level. MRI and CT scan facilitates the diagnosis of ruptured intracranial dermoid.

Adult↗
PubMed1995

[Spinal aneurysmal cyst].

The authors report one case of aneurysmal rachidian cyst who concern a young girl of eleven years old presenting lumbagos with pyramidal irritation on a L2 and L3 lesion. The radiological exploration (CT, MRI) has a double interest: to find again lytical pictures of the rear arch blowing the cortical, liquids levels, logets which remind the macroscopical appearance of the aneurysmal rachidian cyst; to specify the regional extension of preoperative interest. The histological confirmation of the aneurysmal rachidian cyst after a surgical treatment and the conformity of anatomo-radiological descriptions, confirm the predictive value of the semeiology described in case of aneurysmal rachidian cyst.

Bone Cysts, Aneurysmal↗
PubMed1992

CT-guided percutaneous biopsy of the cervical spine: a series of 12 cases.

Twelve patients underwent biopsy of cervical vertebral bodies under CT guidance. An accurate diagnosis was obtained in 11. No complications were observed, except for a transitory recurrent laryngeal nerve palsy. Technical problems of the cervical spine biopsy are discussed and the utility of bone biopsy with a coaxial trephine system is emphasized.

Adult↗
PubMedDate not supplied

[Endovascular treatment of peripheral arteriovenous malformations].

The progress made by noninvasive exploration for the assessment of vascular malformations now allows the therapeutic strategies to be better established. While observation and conservative methods are most often chosen, some arteriovenous malformations lead to contemplating a palliative or curative treatment. In these cases, embolization currently plays a great role, associated or not to surgery. This embolization obviously can be contemplated only after a collegial decision to treat these malformations has been made, knowing that they may be silent or acquire an uncontrollable evolution potential. The authors present 3 cases of peripheral arteriovenous malformations, treated by an endovascular way, and remind the principles and indications of these embolizations.

Adolescent↗