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Öğe An alternative way to cover ventral penile skin defect in Mathieu technique(Hippokrates Verlag Gmbh, 2000) Koltuksuz, U; Gürsoy, MH; Aydinç, M; Mutus, M; Çetin, S; Karaman, AMathieu technique is used satisfactorily in distal penile hypospadias without chordee or with minimal chordee. After using this technique, a large defect may sometimes appear on the ventral surface of the penis. To cover the defect, a few techniques, including preputial island flap, Byar's flap and Ombredanne-Nesbit's flap, are used. We describe a new flap to cover the defect more cosmetically. Twenty-four patients ranging in age from one year to 14 years (median age 6.5 years) were operated on. In the patients for whom the defect could not be covered primarily, a longitudinal incision was made along the midline through the penile shaft skin from penile radix up to the border of preputial skin. The relaxed penile skin, which was incised on the dorsal surface, could be approached and sutured easily on the ventral surface without stretching. The new defect that developed on the dorsal surface was closed with the prepuce matching the defect. Nine patients, two with chordee and seven without chordee, underwent this technique. The cosmetic and functional results were excellent in all patients and none of the patient's parents complained about the cosmetic aspect. Only one fistula complication, which healed spontaneously, developed on the 20th postoperative day. Considering these results, we may conclude that excellent cosmetic results can be accomplished by the use of this flap technique.Öğe Injuries of large vessels in high stage neuroblastoma surgery -: A case report(Edizioni Minerva Medica, 1999) Koltuksuz, U; Gürsoy, MH; Aydinç, M; Özgen, Ü; Ege, E; Mutus, MComplete resection of the primary lesion in stage III neuroblastoma improves survival. Neuroblastoma has a tendency towards surrounding and infiltrating the large vessels, leading to injuries during tumor resection. We operated on a stage III neuroblastoma, which resulted in the right and left common iliac artery and vein damage, The right common iliac artery and, veins were repaired by end to end anastomosis, There was a long gap between the two ends of the left common iliac artery and it was repaired using a mesenteric vein (marginal vein of the colon) graft. Digital subtraction angiography performed 6 months after the operation did not reveal any stenosis or aneurysmatic changes in the anastomoses. We conclude that short segments of large vessels may be sacrificed during the resection of neuroblastomas invading the vessel wall, and the resulting defects may be repaired by end to end anastomosis, or even by substituting mesenteric vein grafts, for the pur pose of total or near total removal.Öğe Intraabdominal lymphangiomyoma in an infant with protein-losing enteropathy and hemihypertrophy(Turkish J Pediatrics, 2000) Koltuksuz, U; Özgen, Ü; Özen, S; Saraç, K; Gürsoy, MHLymphangiomyoma is an extremely rare tumor occurring exclusively in women of reproductive age. The tumor is characterized by proliferation of immature smooth muscle along the lymphatic vessels of the abdomen, thorax and lung. Although lymphangiomyoma has been reported in a young girl and a girl infant, none has been reported in boys. We report herein a case of lympangiomyoma in a two-year-old boy. The unusual presentation in this patient was that the tumor arose from the small bowel mesentery without any evidence of lung involvement. The tumor was extirpated and lymphangiomyomatosis was confirmed pathologically.Öğe Multifocal omental mesenteric inflammatory pseudotumor (plasma cell granuloma)(Hippokrates Verlag Gmbh, 1999) Koltuksuz, U; Gürsoy, MH; Mutus, M; Aydin, A; Aydinc, M; Çetin, S; Çiralik, HInflammatory pseudotumor (IP) is an uncommon benign tumor during childhood. The most common location is lung, and sporadic cases of IP with extrapulmonary involvement such as liver and abdomen are reported. However, the IP among the reported cases have appeared as solitary masses. A multifocal IP in a 14-year-old girl presumed to result following an Entamoeba histolytica infestation is reported.Öğe Topological group-groupoids and their coverings(Indian Nat Sci Acad, 2005) Içen, I; Özcan, AF; Gürsoy, MHLet (X) over tilde -> X be a covering map and let X be a topological group. We define a category UTGCov(X) of coverings of X in which both X and (X) over tilde have universal coverings, and a category UTGGdCov (pi(l), X) of coverings of topological group-groupoid pi(l) X in which X and (G) over tilde (0) = (X) over tilde have universal coverings, and then prove the equivalence of these categories. We prove that the topological group structure of a topological group-groupoid lifts to a topological universal covering groupoid.
