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Biomedical subjects

Z Tazi-Mezalek

Publications and source records attributed to Z Tazi-Mezalek.

6 recordsLinked to original sources

[Neurological manifestations of vitamin B12 deficiency: a retrospective study of 26 cases].

PURPOSE: Neurological symptoms of B12 vitamin deficiency are polymorph. Causes are dominated by Biermer's disease and B12 vitamin non dissociation that is frequent in the elderly. METHODS: We realized a retrospective study during 11 years. Patients with neurological symptoms associated to megaloblastosis were included. Treatment with B12 vitamin lead to haematological manifestation regression. RESULTS: 26 cases were analyzed. Mean age was 50+/-14.5 years and there were 11 women and 15 men. Neurological signs included combined medullar sclerosis (N = 10), peripheral neuropathy (N = 10), isolated paresthesia (N = 5) and inferior limb pyramidal syndrome (N = 1). Neurological signs revealed vitamin B12 deficiency in 4 cases. Mean haemoglobin rate was 6.2+/-2.6 g/dl, mean MCV was 109+/-56 fl. Eight patients had macrocytic anaemia, nine bi-cytopenia and eight deep pancytopenia. Electromyography (N = 8) confirmed neuropathy and medullar MRI (N = 2) showed antero-posterior cordonal demyelinisation of cervico-dorsal medulla. Causes of B12 vitamin deficiency were Biermer's disease (N = 11), non dissociation of B12 vitamin's syndrome (N = 8) and partial gastrectomy (N = 1). In 6 patients, no aetiology was found. Treatment with parenteral vitamin B12 induced neurological symptoms regression in 14 cases. Patient with neurological disorder had significantly higher platelet count and haemoglobin level as compared with patients without neurological disorder. Reticulocyte crisis was more precocious in patients with neurological disorders. CONCLUSION: Neurological symptoms in vitamin B12 deficiency are frequent. We insist on isolated forms, inaugural forms and on the interest of medullar MRI for early diagnosis.

Adult↗

[Takayasu's disease in Morocco. Report of 47 cases].

PURPOSE: Takayasu's disease is a chronic inflammatory arteritis involving large vessels in young women. We studied Moroccan patients to evaluate clinical, biological, radiological and evolution features of this disease in our country. METHODS: Forty-seven patients with Takayasu's arteritis were studied retrospectively between 1988 et 1999. RESULTS: In our series involvement of the aortic arch and its branches was more frequent than the abdominal aorta and its branches. Stenotic lesions of renal arteries were rare. Ultrasound was useful in the diagnosis and the monitoring of the disease. Treatment with glucocorticoids gave good results, with improvement in half of the patients and remission with stabilisation in 40% of cases. Tuberculosis occurred in 8.5% of patients. CONCLUSION: The use of ultrasound and computed tomography angiography is helpful for the diagnosis and monitoring of the disease progression. Glucocorticoids help to induce long remission in about 80% of treated patients. We don't find any relationship between Takayasu's arteritis and tuberculosis.

Adolescent↗

[Behçet disease. 162 cases].

We report 162 cases of Behçet's disease, seen at the Internal Medicine Unit of Ibn Sina Hospital at Rabat, between January 1983 and June 1996. This series concerned 124 men et 38 women, Moroccans, whose mean age at first hospitalization was 32 years, and mean age at disease onset was 26 years. Diagnosis of Behçet's disease was established on Mason and Barnes and/or International Study Group for Behçet's Disease criteria. There was a muco-cutaneous involvement in 100%, eye involvement in 50%, joint involvement in 45%, neurological symptoms in 43.2%, vascular involvement in 62.34%, thoracic involvement symptoms in 13%, digestive involvement in 8 cases, cardiac involvement in 5 patients, long term fever in 5 patients, and one case of amyloidosis. We compared our results to the literature and we noticed that our series had an elevated frequency of neurological involvement, mostly benign intra-cranial hypertension and deep vein thrombosis. We also found that gut involvement was particularly low.

Adolescent↗

[New biological factors of thromboses].

Hypercoagulability states are caused by a disturbance of blood rheology due to the presence or pathological absence of a clotting factor. These abnormalities of haemostasis are essentially studied in the context of venous thrombosis. Over the years, in parallel with the progress in therapeutics, new laboratory abnormalities have been discovered and other, previously described, factors have been recently correlated with thrombotic phenomena. Based on a review of the literature, the authors describe the pathogenic role and the place of these various laboratory abnormalities in thromboembolic disease.

Biological Factors↗