Biomedical subjects
Publications and source records attributed to Kazim Oner.
Facial nerve neuromas are uncommon benign tumors. The diversity of tumor locations and their proximity to vital neurovascular structures create a variety of clinical situations, and the management strategy for each case differs. Two cases with tumors located at different sites and associated with different clinical presentations are discussed in terms of diagnosis and management.
The authors report on two patients with spinal meningeal melanocytoma and review the literature on this lesion. One case is particularly interesting because of the lesion's thoracic intramedullary localization. Meningeal melanocytoma is a benign but locally aggressive lesion and is very rarely associated with spinal localizations. This patient presented with paraparesis. Clinical and radiological examinations suggested the possibility of an intramedullary solid tumor. Thoracic laminectomy, posterior myelotomy, and tumor resection were performed; the mass was totally removed. The patient suffered no additional neurological deficit. During a 3-year follow-up period in which radiotherapy was not performed, the lesion did not recur. Total excision of the tumor is the best therapeutic option.
OBJECTIVE: Although the transseptal approach to the sella turcica is the most common method by which the pituitary tumors are resected, it is not suitable for the noses with narrow nostrils, precluding the placement of the neurosurgical speculum. In this paper, as a solution for this problem, 'the columellotomy modification' of the transseptal approach is suggested and described together with the results in five patients. METHODS: In five patients, the distance between the outer edges of the two blades of the neurosurgical speculum was measured after positioning the neurosurgical speculum through the hemitransfixion incision, and after positioning the neurosurgical speculum through 'the columellotomy' incision. The increase in distance after hemitransfixion incision with respect to the width of the nostril was statistically compared with the increase in distance after 'columellotomy' incision with respect to the width of the nostril. The postoperative complaints and cosmetic results were evaluated. RESULTS: By paired-samples t-test, the comparison between the values of increase revealed a statistically significant difference (P=0.011). A complaint of numbness on the columellar skin was noted in three of the five patients. Cosmetic results were satisfactory. CONCLUSION: 'The columellotomy modification' offers a wide, direct and fast exposure to the sella turcica without a cosmetic disadvantage in noses with narrow nostrils.
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Split cord malformations (SCMs) are uncommon congenital spinal anomalies and are seen mostly in females. SCMs in siblings are extremely rare. We report two sisters with SCM. These 10- and 8-year-old girls were the first and second children, respectively, of nonconsanguineous parents. Both sisters had a hypertrichosis and pes cavus deformity. The first child had a type I SCM and the second a type II SCM. They had additional spinal lesions, with tethering of the spinal cord. They were operated on and showed an uneventful postoperative course. All reported siblings with SCM have been female. The present data are not sufficient to account for the sex predilection. Therefore, further data and knowledge are needed.