Okan Biçgi
Atatürk University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Okan Biçgi.
International Urology and Nephrology | 1999
İsa Özbey; Yılmaz Aksoy; Okan Biçgi; Özkan Polat; G. Okyar
A review of our records between 1993 and 1998 identified 25 patients with transitional cell carcinoma of the bladder who were less than 40 years old, 22 males and 3 females. The youngest patient was 19 years old. At the time of diagnosis 16 patients had superficial (Ta/T1) and 9 had invasive disease. Twenty-four patients were followed up for a period of 3–71 months (mean: 19.2 months). The recurrence rate for patients with superficial disease was 12.5%, and the progression rate for patients with invasive disease was 77.7%.We concluded that the patients under 30 years of age presented with lower grade and lower stage disease than those over 30. Transitional cell carcinoma of the bladder in young adults has a natural history similar to that seen in older patients. Accordingly, all patients, regardless of age, should be treated as aggressively as necessary on the basis of the stage and the grade of the tumour.
Urologia Internationalis | 2002
Yılmaz Aksoy; Nesrin Gürsan; İsa Özbey; Okan Biçgi; Muzaffer Keles
Here we describe the clinical, radiologic, histopathological and immunohistochemical features of a rare spontaneous rupture of renal angiosarcoma detected in the left kidney of a 55-year-old male. Due to the rarity of this neoplasm (less than 15 cases have been reported), there is no unanimous concensus for therapy following radical nephrectomy. In our case there was no flank trauma and retroperitoneal haematoma around the left kidney was seen on computed tomography. The patient underwent left radical nephrectomy and died about 3 months after operation due to multiple bone and liver metastases. To our knowledge, this is the first report of spontaneous rupture of renal angiosarcoma and we suggest that it should be borne in mind that renal angiosarcoma may be a cause of retroperitoneal haematomas.
International Urology and Nephrology | 1999
İsa Özbey; Yılmaz Aksoy; Özkan Polat; Okan Biçgi; A. Demirel
We have documented the data of squamous metaplasia of the bladder in 14 patients who had undergone cystoscopies for different reasons. In two biopsies, there were marked keratinization and cellular atypia. One of these two subjects was diagnosed as squamous carcinoma of the prostate and transitional cell carcinoma of the bladder. The lesions of 8 female patients were on the trigone and evaluated as normal anatomical variants due to hormonal changes. Three of them were remarkable because of recurrent urinary infections. Apart from the two male patients with squamous cell carcinoma of the prostate the two male patients with current squamous metaplasia have been following up. In this study, we have also reviewed the relationship between squamous metaplasia, infection and malignancy.
International Urology and Nephrology | 2001
İss Özbey; Yılmaz Aksoy; Okan Biçgi; Özkan Polat
The aim of this study is to review 9 cases with urinary tract hydatid disease in terms of symptoms, findings, laboratory tests, radiological findings and treatment modalities.There were 7 males and 2 females with a mean age of 33.6 years (range from 7 to 67 years). In 6 patients hydatid cyst was located in the kidney (1 involved the liver), in 2 the cysts were in the paravesical and retrovesical region (1 coexisted bladder tumor) and 1 the cyst was located adrenal gland. The investigations included urinalysis, eosinophil count, Casoni skin test, indirect haemagglutination test (IHA), transabdominal ultrasonography (TAUS), intravenous urography (IVU) and computed tomography (CT). All patients underwent various surgical procedures and were followed-up for an average of 3 years (range: 1 month to 5 years) period in terms of complications and recurrence rates.The most common symptom was lumbar or abdominal pain. Eosinophilia was seen in 4 patients (44.4%), IHA positivity in 3 patients (33.3%) and Casoni skin test were positive in 3 patients (33.3%). The most diagnostic method of radiological investigations was abdominal pelvic CT (100%). After surgical treatment, in mean a 3 year (range: 1 month to 5 years) follow-up period, no complication and recurrence were seen.Hydatid disease of the urinary tract is relatively uncommon and is likely to cause considerable diagnostic difficulties for clinicians and radiologists; therefore, it should be born in mind in the differential diagnosis of space-occupying lesions of the urinary tract.
International Urology and Nephrology | 1999
İsa Özbey; Yılmaz Aksoy; Özkan Polat; Okan Biçgi; A. Demirel; G. Okyar
AbstractObjective: In this study, a randomized and placebo controlled trial, we aimed to study the effectiveness and safety of doxazosin based upon urodynamic parameters, especially pressure/flow studies, in men with benign prostatic hyperplasia (BPH). Materials and methods: A total of 57 men (29 doxazosin, 28 placebo) 48–82 years of age with BPH were enrolled. Yet, 8 of 29 in the doxazosin group and 10 of 28 in the placebo group were excluded due to side effects of doxazosin and intolerability of urodynamic assessment of free uroflow, postvoiding residual-urine volume (PVR) and pressure/flow studies. Results: There were improvements in all urodynamic parameters (Free Qmax: 30.4% and 28%, PVR: 14 ml and 12 ml, invasive Qmax: 29.3% and 26.2%, Pdet at Qmax: −32.7% and −30%, Pdet-max: −29% and −27.7% at end of the 1st and 6th months whereas placebo effects were worsening in all urodynamic parameters. Conclusions: We suggest that doxazosin is an important treatment option for patients with BPH, and efficacy of doxazosin should be evaluated with objective, quantitative urodynamic studies not with subjective symptom scores. But additional costs and invasiveness of urodynamic studies restrict their common usefulness.
International Urology and Nephrology | 2001
İsa Özbey; Yılmaz Aksoy; Özkan Polat; Gündoğdu C; Okan Biçgi
The risk of developing malignancy in undescendent testis is 10–50 times greater than that of descendent testis [1]. The risk of synchronous and metachronous tumors in undescendent and ectopic testes has been reported as 2.05% and 5.8% [2, 3]. Because undescendent testis has a great risk of cancer, if malignancy occurs in an undescendent testis, contralateral testis will have far more risk of cancer. Therefore, if there were cancer in a testis, the other one should be followed-up carefully. On the other hand, if we didn’t want to meet an intraabdominal mass, before saying testicular agenesis, we should use all diagnostic methods for ectopic testis. Here, we have reported a man with metachronous testis tumor, who had undergone right orchidopexy and then inguinal orchidectomy due to testicular tumor and had metachronous intraabdominal tumor in left testis accepted agenesis before, while followed-up for right testis tumor, and we have reviewed literature.
Archive | 1999
Yılmaz Aksoy; İsa Özbey; Okan Biçgi; Özkan Polat; Azam Demirel; Güray Okyar
Atatürk Üniversitesi Tıp Dergisi | 1999
İsa Özbey; Yılmaz Aksoy; Okan Biçgi; Mehmet Cesur; Özkan Polat; Hüsnü Kürşat
Atatürk Üniversitesi Tıp Dergisi | 1999
İsa Özbey; Yılmaz Aksoy; Okan Biçgi; Özkan Polat; Nazan Aydin; Azam Demirel
Atatürk Üniversitesi Tıp Dergisi | 1998
İsa Özbey; Yılmaz Aksoy; Okan Biçgi; Cemal Gündoğdu; Azam Demirel