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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/3

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    An unusual location for a choroid plexus papilloma: the pineal region
    (Springer, 2014) Sasani, Mehdi; Solmaz, Bilgehan; Öktenoğlu, Tunç; Özer, Ali Fahir; Faculty Member; School of Medicine; 1022
     Purpose Choroid plexus papillomas (CPP) are rare benign neoplasms of the central nervous system that occur most often in children during the first decade of life. They occur most often in the lateral ventricle. It is extremely rare for a CPP to occur in the pineal region. We describe the case of a child with a CPP located in the pineal region, who was initially diagnosed with obstructive hydrocephalus by cranial computed tomography (CT). Methods A 9-year-old female patient presented with complaints of visual disturbance, nausea, and vomiting. Magnetic resonance imaging (MRI) showed a poor contrastenhanced pineal-localized lesion. Anatomical variations within the patient caused her surgery to proceed using a supratentorial-occipital interhemispheric approach. Results The tumor was totally removed, and a histological examination revealed the tumor to be a typical CPP. The patient received follow-up neurological and ophthalmologic examinations at 3, 6, 9, 12, 24, and 36 months postoperatively, which demonstrated her progressive improvement. Conclusions CPPs may have a wide range of locations and resulting symptoms. However, the pineal region is a rarely encountered location, particularly for pediatric patients. It is of great value to correctly differentiate neoplasms such as germ cell tumors, pineocytomas, meningiomas, and astrocytomas, so that patients receive the correct diagnosis and treatment approach.
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    Enlargement of neural foramina and dynamic stabilization in spondylolisthesis without restoring the alignment: technical note
    (Seoul : Taehan Ch'ŏkch'u Sin'gyŏng Oekwa Hakhoe, 2016) Sasani, Mehdi; N/A; Özer, Ali Fahir; Süzer, Süleyman Tuncer; Egemen, Emrah; Öktenoğlu, Bekir Tunç; Faculty Member; Faculty Member; Doctor; Faculty Member; School of Medicine; School of Medicine; N/A; School of Medicine; N/A; N/A; Koç University Hospital; N/A; 1022; 221691; N/A; 220898
    It is well known that the cause of radiculopathy is the compression of the nerve root within the foramina which is narrowed secondary to sliding of the corpus and reduced disc height. In some patients, unroofing the foramen does not resolve this problem. We described a new decompression technique using pedicle removal and transpedicular dynamic instrumentation to stabilization the spine. We performed this operation in 2 patients and achieved very good results.