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    Evaluation of the effectiveness of biodegradable electrospun caprolactone and poly(lactic acid-e-caprolactone) nerve conduits for peripheral nerve regenerations in a rat sciatic nerve defect model
    (Tubitak Scientific & Technological Research Council Turkey, 2016) Dadaci, Mehmet; Karagulle, Nimet; Sonmez, Erhan; Dadaci, Zeynep; Isci, Evren Tevfik; Ince, Bilsev; Vargel, Ibrahim
    Background/aim: The aim of this study was to compare electrospun caprolactone (EC) and poly(lactic acid-epsilon-caprolactone) (PLCL) nerve conduits with nerve graft in a rat sciatic nerve defect model. Materials and methods: A total of 32 male Wistar albino rats were divided into 4 groups, with 8 rats in each group. A nerve defect of 1 cm was constructed in the left sciatic nerve of the rats. These defects were left denuded in the sham group, and reconstructed with nerve grafts, PLCL, and EC nerve conduits in the other groups. After 3 months, nerve regenerations were evaluated macroscopically, microscopically, and electrophysiologically. The numbers of myelinated axons in the cross-sections of the nerves were compared between the groups. Results: Macroscopically, all nerve coaptations were intact and biodegradation was detected in nerve conduits. Electromyographic assessment and count of myelinated axons in the cross-sections of the nerves displayed the best regeneration in the nerve graft group (P < 0.001) and similar results were obtained in the PLCL and EC nerve conduit groups (P = 0.79). Light and electron microscopy studies demonstrated nerve regeneration in both nerve conduit groups. Conclusion: EC nerve conduits and PLCL nerve conduits yielded similar results and may be alternatives to nerve grafts as they biodegrade.
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    Spontaneous Resolution of an Orbital Mass After Delivery: A Diagnostic Challenge
    (Lippincott Williams & Wilkins, 2018) Dadaci, Zeynep; Kadiyoran, Cengiz; Golen, Mustafa; Cizmecioglu, Hilal Akay
    The authors report a 35-year-old woman who presented 1 month after delivery with the complaint of pain behind her left eye which started during her pregnancy. The patient described increased fullness with dependent head position and pain on left gaze but she had no proptosis and her ocular examination was normal. Magnetic resonance imaging (MRI) revealed an intraconal mass with inhomogeneous contrast enhancement. As the authors did not suspect malignity and her ocular examination was normal without any signs of inflammation, the authors followed the patient closely. Repeat MRI obtained 6 months after delivery revealed complete resolution of the mass. Upon disappearance of the lesion, the authors reviewed the case thoroughly and decided that orbital venous anomaly with intralesional hemorrhage/thrombosis was the most probable diagnosis. As hemorrhage or thrombosis occurring in orbital vascular anomalies may be a diagnostic challenge because of the localized lesion and distinct borders, careful interpretation of clinical characteristics and MRI findings and close follow-up is important in interpretation of orbital mass lesions, especially in pregnant or puerperal women.