Browsing by Author "Arat, Yonca Ozkan"

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Angiographic Morphometry of Internal Carotid Artery Circulation in Turkish Children
(2015) Arat, Yonca Ozkan; Arat, Anil; Aydin, Kubilay; 26242339
AIM: Knowledge of cerebrovascular morphology is integral in planning neuroendovascular interventions, especially for procedures involving placement of stents, flow diverters or stentrievers. There is insufficient data on angiographic normative values of cerebral circulation in the pediatric age group since angiograms are uncommonly performed in children except for arteriovenous malformations in which arterial dimensions are larger than normal. We aimed to measure the diameters of internal carotid circulation (ICC) arteries on digital subtraction angiograms of pediatric patients and determine the growth trends. MATERIAL and METHODS: This is a retrospective cross-sectional study measurements of ICC arteries of 64 pediatric patients (4- 122 months) with retinoblastoma undergoing intra-arterial chemotherapy. RESULTS: Petrous, cavernous, supraclinoid and choroidal segments of internal carotid artery (ICA) and anterior cerebral artery (ACA) diameters had significant correlation with age. Most of the growth was noted in the first 36-48 months of life. Middle cerebral artery (MCA) diameter did not show significant correlation with age. 87% of the adult diameter of the MCA was attained in the first 6 months of life. ICC arteries reached 81% to 99% of adult sizes in the first 48 months of life. On the contrary, the main iliac artery was only 59% of the adult diameter at this age group. CONCLUSION: Use of current intracranial stents in children appears tolerable due to the growth pattern of ICC arteries. Based on this data, the current armamentarium of intracranial stents or stent-like devices is sufficient to cover the need in the pediatric population.
Association of Disease Activity with Serum and Tear IL-2 Levels in Behc, et Disease
(2016) Turkcuoglu, Peykan; Arat, Yonca Ozkan; Kan, Emrah; Kan, Elif Kilic; Chaudhry, Imtiaz A.; Koca, Suleyman; Celiker, Ulku; Ilhan, Nevin; https://orcid.org/0000-0002-6578-7444; 26110544; AAA-2259-2021
Purpose: To investigate the association of Behcet disease activity with serum and tear interleukin-2 levels. Methods: The study was designed as a prospective case control study. The study population consisted of 45 patients with Behcet disease and 24 age and sex-matched healthy participants. Behcet disease patients were classified as active (24 patients) or inactive (21 patients) according to disease activity. Serum and tear interleukin-2 levels were determined using the enzyme-linked immunosorbent assay method. Results: The mean serum and tear interleukin-2 levels of the active disease, inactive disease, and control groups were 17.04 +/- 5.02 and 32.61 +/- 16.53 pg/mL; 15.20 +/- 4.68 and 29.61 +/- 8.30 pg/mL; and 14.22 +/- 4.18 and 28.89 +/- 8.73 pg/mL, respectively. There was no statistically significant difference between the groups with respect to all measured data. Conclusions: There was no significant difference in serum or tear IL-2 levels between Behcet patients and controls; there was no association of disease activity with serum and tear IL-2 levels.
An Atypical Case of Microphthalmos With Cyst: Cyst Masquerading as Phthisical Eye
(2015) Ozturker, Can; Kaynak, Pelin; Arat, Yonca Ozkan; Karabulut, Gamze Ozturk; Akar, Serpil; Demirok, Ahmet; 0000-0002-6578-7444; 24833453; AAA-2259-2021
Cerebrovascular complications of transorbital penetrating intracranial injuries
(2015) Arat, Yonca Ozkan; Arat, Anil; Aydin, Kubilay; 26374414
BACKGROUND: Cerebrovascular trauma secondary to transorbital intracranial penetrating injury (TIPVI) is rare. Relatively benign initial presentation may mask the underlying life-threatening vascular injury in transorbital intracranial penetrations. The aim of this study was to evaluate clinical features and endovascular treatment of TIPVI. METHODS: Six patients with angiographic documentation of TIPVI in subacute/chronic phase were reviewed retrospectively. Five were treated endovascularly; however endovascular treatment was aborted in one and conservative management was pursued. RESULTS: Except for one case presenting with vision loss and mild stroke, no significant neurologic deficit was present. Vascular lesions included two cases of carotid-cavernous fistulas, three traumatic aneurysms of cavernous carotid, anterior and middle cerebral arteries and a unique case of coalescing cavernous aneurysms following a through-and-through injury in which the aneurysms united within the thrombosed cavernous sinus on follow up. Fistulas were treated with covered stents, aneurysms with parent artery occlusion or flow diverters. All patients had uneventful recoveries. CONCLUSION: TIPVI may present in a delayed fashion after a seemingly benign presentation. A high index of suspicion is critical to rule out TIPVI with vascular imaging. Transcatheter angiographic techniques allow for both diagnosis and treatment of TIPVI with favorable results.
Metastatic Embryonal Conjunctival Rhabdomyosarcoma in a 4-Year-Old Boy
(2017) Sezenoz, Almila Sarigul; Karalezli, Aylin; Arat, Yonca Ozkan; Coban, Gokcen; Kiratli, Hayyam; Terzi, Aysen; 0000-0002-4010-2883; 0000-0002-7030-5454; 0000-0002-6578-7444; 26505233; P-7533-2014; AAJ-4860-2021
The authors report the case of a 4-year-old boy who presented with unilateral ptosis and a mass lesion of palpebral conjunctiva of the left upper eyelid, that had been present for 2 weeks, and had rapidly enlarged. The lesion was salmon colored and was easily distinguished from the conjunctiva. There was no obvious orbital extension in the MRI studies. Excisional biopsy was performed through a conjunctival approach. The histopathology was consistent with embryonal rhabdomyosarcoma. Thoracoabdominal CT scans revealed nodules in both lungs, indicating stage 4 disease. The patient received chemotheraphy and intensity-modulated radiation therapy. Rhabdomyosarcoma confined to the conjunctiva and distant metastasis without orbital involvement is rare. It should be included in the differential diagnosis of any atypical conjunctival mass lesions in children, and histopathology is necessary to establish proper treatment. As the case indicates, detailed systemic evaluation and careful systemic follow up of these patients are mandatory.
An unusual eyelid mass: Tarsal dermoid cyst
(2015) Sezenoz, Almila Sarigul; Arat, Yonca Ozkan; Tepeoglu, Merih; 26586987
We report the case of a 15-month-old boy who presented with a mass lesion of the right upper eyelid that had been present since birth and had slowly enlarged over the last 3 months. The lesion had minimal surrounding erythema simulating the appearance of a chalazion. Intraoperatively the lesion was noted to be firmly adherent to the underlying tarsus. The lesion was excised completely through an eyelid crease approach leaving the tarsus intact. The histopathology was consistent with dermoid cyst. To our knowledge, this is the third case of a tarsal dermoid cyst reported in the literature. Dermoid cyst should be included in the differential diagnosis of eyelid mass lesions, and particulary differentiated from a chalazion to avoid mismanagement that may lead to scarring, recurrence and inflammation. The excision of these lesions sparing the underlying tarsus can be possible.