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Biomedical subjects

A Erdogan

Publications and source records attributed to A Erdogan.

9 recordsLinked to original sources
PubMed1996

Prevalence and predictors of atrial fibrillation in rheumatic valvular heart disease.

The highest frequency of AF in RHD occurs in those with mitral stenosis, mitral regurgitation, and tricuspid regurgitation in combination. AF, while occurring in 29% of patients with isolated mitral stenosis and in 16% with isolated mitral regurgitation, is an infrequent finding (1%) in patients with aortic valvular disease. Left atrial diameter by univariate analysis, and age and left atrial diameter by multivariate analysis have been shown to be the most important parameters to determine the occurrence of AF in patients with RHD.

Adolescent↗
PubMed1996

Colloid cyst of the third ventricle. Evaluation of 28 cases of colloid cyst of the third ventricle operated on by transcortical transventricular (25 cases) and transcallosal/transventricular (3 cases) approaches.

The clinical and x-ray features of 28 cases of colloid cyst of the third ventricle are described. Colloid cyst is one of the most favourable space-occupying lesions of the brain for successful surgical removal, because an exact pre-operative diagnosis is possible. The surgical approach for colloid cyst of the third ventricle is discussed and the frequency of postoperative seizure is reviewed in 28 cases and compared with the literature.

Adolescent↗
PubMed1995

Tentorial meningiomas.

We report our experience with and long-term results of 37 patients with tentorial meningiomas who underwent surgery between 1972 and 1993. The average age was 43 years, and the mean duration of symptoms was 36 months. Headache (83.8%) and extremity or gait ataxia (35.1%) were the most common complaints. On neurological examination, signs of elevated intracranial pressure and cerebellar deficits (51.4%) were the most common findings, followed by third nerve involvement (35.1%). Computed tomography, angiography, and, in recent years, magnetic resonance imaging were used as diagnostic tools and for planning the surgical procedure. According to the primary site of attachment, the tentorial meningiomas were divided into three subgroups: medial, lateral, and falcotentorial. The lateral and medial tumors, with mainly supratentorial development, were approached from above by using a temporal, temporooccipital, or parietooccipital craniotomy. For tumors developing mainly in the posterior cranial fossa, suboccipital craniectomy was performed. In six patients who showed medial tentorial and petrous apex attachment, a combined subtemporal transpetrosal and retromastoid approach was performed. In 31 patients, the tumors were totally removed, and, in 6 patients, only subtotal excision could be done. Seven patients had postoperative complications, but only one of them died of severe brain edema. Our mortality rate was 2.7%. In this article, appropriate preoperative studies, surgical techniques, and surgical results are discussed.

Adult↗
PubMed1994

Primary optic nerve sheath meningiomas. Report of seven cases (clinical neuroradiological, pathological and surgical considerations in seven cases).

Between 1985 and 1993, we treated seven cases of optic nerve sheath meningiomas. The median age at onset of their symptoms was 42.14 years. All of the patients were aged between 27 and 60 females with a slowly progressive lesion. Computed tomography and/or magnetic resonance imaging were used as diagnostic procedure in our cases. We operated on using microsurgical techniques in all of these cases. Vision was preserved in the three of our cases. The definitive treatment for these lesions is surgical resection, although no single best plan for optimal management has been determined. The data indicate that only small anterior tumors may be removed with preservation of useful vision. With posterior circumferential tumors, there have been no cases of tumor removal with preservation of vision. A management strategy directed toward preservation of vision is discussed.

Adult↗
PubMed1993

Medulloblastomas.

81 patients with biopsy proven medulloblastoma with a mean age of 11.4 years were reviewed. Total removal of the tumour was accomplished in 18 cases (22.2%), subtotal removal in 55 cases (67.9%) and biopsy alone in 8 cases (9.9%). 34 patients (27.5%) had a recurrence of the tumour and 8 patients underwent a second posterior fossa exploration at the time of recurrence. In patients with total resection, five-year survival was 27.7%. With partial resection, five-year survival decreased to 14.5%. In patients with radiotherapy chemotherapy, 21.4% survived 5 years after treatment but this rate decreased to 18.4% in patients treated with radiotherapy only. The surgical mortality rate was 12.3%.

Adolescent↗
PubMed1981

A giant meningioma of the fourth ventricle associated with Sturge-Weber disease.

A case of meningioma without dural attachment within the fourth ventricle associated with Sturge-Weber disease is reported. Review of the literature revealed that meningiomas arising from the choroid plexus of the fourth ventricle and lying totally within the fourth ventricle are very rare. Coexistence of Sturge-Weber disease with meningioma of the fourth ventricle has never been reported, as far as we could find out.

Adult↗