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Permanent URI for this collectionhttps://hdl.handle.net/11443/932
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Item Bilateral recurrent external obturator muscle hematoma: An unusual cause of pelvic pain in hemophilia(SPANDIDOS PUBL LTD, 2016-01-01) Arpaci, Taner; Sasmaz, Ilgen; Akbas, Tugana; Eken, Alper; Ozgur, Anil; Antmen, BulentFollowing joint hemorrhages, intramuscular hemorrhages are the second most prevalent bleeding pattern in hemophiliac patients. Hematomas of the iliopsoas muscle are a well-known complication of hemophiliaItem Primary pericardial extragastrointestinal stromal tumor: A case report and literature review(SPANDIDOS PUBL LTD, 2015-01-01) Arpaci, Taner; Tokat, Fatma; Arpaci, Rabia Bozdogan; Akbas, Tugana; Ugurluer, Gamze; Yavuz, SinanGastrointestinal stromal tumors (GISTs) are the most prevalent mesenchymal tumors of the gastrointestinal tract. GISTs are considered to originate from the interstitial cells of Cajal, the pacemakers of the peristaltic activity of the gastrointestinal tract. More than 95\% of GISTs express KIT protein and discovered on GIST-1. GISTs may also be encountered in locations outside the gastrointestinal tract, in which case they are referred to as extra-GISTs (EGISTs) and often behave more aggressively. This is the case report of a primary pericardial EGIST in a 53-year-old male patient, confirmed by immunohistochemistry. To the best of our knowledge, this is the third case of EGIST diagnosed above the diaphragm, without being associated with the esophageal wall. Two cases of primary EGIST arising from the pleura were reported previously. In addition, this is the first reported case of an EGIST originating from the pericardium.Item Computed tomography based evaluation of prostatic fiducial marker migration between the periods of insertion and simulation(AVES, 2017-01-01) Arpaci, Taner; Ugurluer, Gamze; Ispir, Emine Burcin; Eken, Alper; Akbas, Tugana; Serin, MeltemObjective: The aim of this study was to determine whether significant fiducial marker migration occurs between the periods of prostatic marker insertion and computed tomography (CT) performed for radiotherapy planning and if a waiting period is necessary. Material and methods: Thirty-nine patients with prostate adenocarcinoma underwent fiducial marker insertion before radiotherapy between June 2013 and December 2015. Three markers were inserted by one radiologist under the guidance of transrectal ultrasonography. All patients underwent CT three hours after insertion to confirm the number and position of fiducial markers. Radiotherapy planning CT was performed on an average of 11 days (range 7-20) after insertion. CT images were imported into treatment planning system to analyze the position of fiducial markers. Point-based marker match algorithm was used to find the distance of marker migration. The mean and maximum distances between each fiducial markers were calculated. Results: The mean distance of migration was 1.029+/-0.42 mm (range 0.23-1.93 mm) and the maximum distance was 1.361+/-0.59 mm (range 0.25-2.74 mm). The distance of marker migration was not statistically significant for the groups organized according to the timing of marker insertion, prostate volume, patient age, prostate specific antigen level and Gleason score. Conclusion: According to our results significant fiducial marker migration did not occur during the interval between insertion and treatment planning CT. It should be taken into consideration that performing simulation on the same day as marker insertion might prevent increased cost and delayed radiation therapy by saving the patients from extra visits to the clinic.Item Computed tomography imaging of acute gastrointestinal graft-versus-host disease after haematopoietic stem cell transplantation in children(TERMEDIA PUBLISHING HOUSE LTD, 2018-01-01) Arpaci, TanerAim of the study: To evaluate computed tomography (CT) findings of gastrointestinal graft-versus-host disease (GI-GVHD) occurring in children after haematopoietic stem-cell transplantation (HSCT). Material and methods: From February 2013 to May 2018, 225 paediatric patients underwent HSCT. Sixty-eight patients (30\%) presented with clinical diagnosis of acute GI-GVHD in the first 100 days after HSCT. Thirty-five (18 girls, 17 boysItem Desmoplastic neurotropic melanoma: A diagnostic trap(DERI ZUHREVI HASTALIKLAR DERNEGI, 2015-01-01) Arpaci, Rabia Bozdogan; Kara, Tuba; Serinsoz, Ebru; Karabulut, Yasemin Yuyucu; Gursoy, Didar; Sari, Alper; Ozgur, Anil; Arpaci, TanerDesmoplastic neurotropic melanoma (DNM) is known as a rare variant of cutaneous melanoma. The authors defined the term `neurotropic' which is used to refer to the associated nerve infiltration or neural differentiation. A 74-year-old female applied to the plastic surgery clinic with a one-year history of a nodule in the left infraorbital skin. The lesion was excised by the surgeons and was sent to the pathology department. The tumor with spindle cells in a scar-like stroma was detected microscopically and diagnosed as a `dermatofibroma'. Eight months after surgery, a deep-seated nodule recurred at the same place. This nodule was re-excised. In this sample, we observed hypercellularity, atypical mitoses and nerve infiltration of the spindle tumor cells having strong positive staining with S-100 protein and negative staining with HMB-45, thus, the ultimate diagnosis was DNM. The differential diagnosis of this lesion includes many benign and malignant entities. This is crucial because of the potential for recurrence and metastasis of the lesion.Item Rebound thymic hyperplasia after bone marrow transplantation in children with haemato-oncological diseases(TERMEDIA PUBLISHING HOUSE LTD, 2018-01-01) Arpaci, Taner; Karagun, Barbaros SahinAim of the study: To evaluate prevalence of rebound thymic hyperplasia (RTH) after bone marrow transplantation (BMT) in paediatric patients with haemato-oncological diseases. Material and methods: Between February 2013 and December 2017, BMT was performed in 189 paediatric patients with haemato-oncological diseases in our institution. Fifty-six patients who underwent at least two chest computed tomography (CT) exams performed before and after BMT were included in the study. Maximum transverse and anterior-posterior (AP) diameters and CT attenuation of the thymus were measured on axial images. Thymic enlargement was considered when both transverse and AP diameters increased. RTH was defined as the presence of thymic enlargement on CT after BMT relative to the CT taken before. Results: Twenty of 56 patients (36\%) demonstrated RTH (12 boys, 8 girls