S Dervisoglu

Istanbul University, İstanbul, Istanbul, Turkey

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Publications (36)41.51 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Background: To assess the long term clinical outcome of preoperative radiotherapy with or without chemotherapy followed by limb sparing surgery in patients with non-metastatic soft tissue sarcomas (STS) of the extremities. Materials and Methods: Sixty patients with locally advanced STS were retrospectively analyzed. The median tumor diameter was 12 cm. All patients were treated with preoperative radiotherapy delivered with two different fractionation schedules (35Gy/10fr or 46-50Gy/23-25fr). Neoadjuvant chemotherapy was added to 44 patients with large and/or high grade tumors. Surgery was performed 2-6 weeks after radiotherapy. Chemotherapy was completed up to 6 courses after surgery in patients who had good responses. Results: Median follow-up time was 67 months (8-268 months). All of the patients had limb sparing surgery. The 5-year local control (LC), disease free (DFS) and overall survival (OSS) rates for all of the patients were 81%, 48.1% and 68.3% respectively. 5-year LC, DFS and cause specific survival (CSS) were 81.7%, 47%, 69.8%, and 80%, 60%, 60% in the chemoradiotherapy and radiotherapy groups, respectively. On univariate analysis, patients who were treated with hypofractionation experienced significantly superior LC, DFS and CSS rates with similar rates of late toxicity when compared with patients who were treated with conventional fractionation and statistical significance was retained on multivariate analysis. Conclusions: Treatment results are consistent with the literature. As neoadjuvant chemoradiotherapy provides effective LC and CSS with acceptable morbidity, it should be preferred for patients with large and borderline resectable STS.
    Asian Pacific journal of cancer prevention: APJCP 02/2014; 15(4):1775-1781. DOI:10.7314/APJCP.2014.15.4.1775 · 1.50 Impact Factor
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    ABSTRACT: To evaluate the long term results among patients with soft tissue sarcoma of the thoracic wall. Twenty-six patients who were treated with pre-or postoperative radiotherapy between December 1980-December 2007, with a diagnosis of soft tissue sarcoma of the thoracic wall were retrospectively evaluated. The median age was 44 years (14-85 years) and 15 of them were male. A total of 50% of patients were grade 3. The most common histologic type of tumor was undifferentiated pleomorphic sarcoma (26.9%). Tumor size varied between 2-25 cm (median 6.5 cm). Seventeen of the cases had marginal and 9 had wide local resection. Four cases received preoperative radiotherapy and 22 postoperative radiotherapy. Six of the patients with large and high grade tumors received chemotherapy. Median follow-up time was 82 months (9-309 months). Local recurrence and metastasis was detected in 34.6% and 42.3% of patients, respectively. Five- year local control (LC), disease-free survival (DFS), overall survival (OS), and disease-specific survival (DSS) were 62%, 38%, 69%, and 76% respectively. On univariate analysis, the patients with positive surgical margins had a markedly lower 5-year LC rate than patients with negative surgical margin, but the difference was not significant (43% vs 78%, p=0.1). Five-year DFS (66% vs 17%) and DSS (92% vs 60%) rates were significantly worse for the patients who had high grade tumors (p=0.01, p=0.008 respectively). Tumor grade and surgical margin are essential parameters for determining the prognosis of thoracic wall soft tissue sarcoma both in our series and the literature.
    Asian Pacific journal of cancer prevention: APJCP 01/2014; 15(22):9949-53. · 1.50 Impact Factor
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    ABSTRACT: Uterine leiomyomas are the most common gynecological tumors in adult women. These benign tumors are rarely seen in the adolescent population: there are only a few cases that have been reported so far in this age group. In this case report, we present a giant uterine leiomyoma that mimicked an ovarian tumor in a 15-year-old girl.
    Japanese journal of radiology 11/2013; 32(1). DOI:10.1007/s11604-013-0263-z · 0.73 Impact Factor
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    ABSTRACT: A patient with a 2-year history of pain in the left arm, and decreased strengths unrelieved by non-steroidal anti-inflammatory therapy, was being referred for repeating radiography. The radiologic examinations have demonstrated a unique pattern of non-contiguous osteolysis in the left elbow, proximal and distal radius, ulna, wrist, carpal bones, proximal and distal metacarpals and phalanges. Multi-site biopsies were being performed and confirmed the diagnosis of massive osteolysis. To our knowledge, this is the first case in which multifocal, non-contiguous osteolysis with skip lesions without associated nephropathy and without a hereditary pattern is being described in one extremity.
    Korean journal of radiology: official journal of the Korean Radiological Society 11/2013; 14(6):946-950. DOI:10.3348/kjr.2013.14.6.946 · 1.32 Impact Factor
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    ABSTRACT: Purpose. This study has researched the affect of different methodologies of harvesting and analysing the samples in determining the mediators emerging after the rat articular cartilage injury. Materials and Methods. One hundred and forty-four male wistar rats were divided into 2 groups. Synovial fluid samples were taken from all of the rats. We entered into the right knees of the rats in group I (n = 36) under anaesthesia and took cartilage tissue samples from their distal femur. Samples were taken as reference values for enzyme linked immunosorbent assay (ELISA) and histopathological evaluations. We entered into the right knees of the rats in group II (n = 108) and formed complete layer of cartilage injury in their medial femoral condyles. At the end of the 15th day, the rats were sacrificed after taking synovial fluid samples from their right knees creating defect in the rats in group II. The molecular markers in the synovial fluid and cartilage tissue samples which were taken from the experimental and control groups (MMP-9, MMP-13, TIMP-1, TNF- α , and NO) were analysed by direct or indirect methodologies. SPSS 18.0 Package program was used in the statistical evaluation. Students t-test where the measurement variables between the experimental and control groups were compared was applied. Receiver Operating Characteristics (ROC) curves were used in the determination of the diagnostic sufficiency from the tissue. Results. No difference was found between TIMP-1 (P = 0.67) and MMP-9 (P = 0.28) levels in synovial fluid and cartilage tissue. From the molecular markers, when MMP-9, MMP-13, NO, TIMP-1, TNF- α ', the area under ROC curve, and P values were examined, MMP-13 (P < 0.0001, 95% CI: 0.70-0.85), NO (P < 0.0001, 95% CI: 0.72-0.86), and TNF- α (P < 0.0001, 95% CI: 0.91-0.98) results were found to be statistically significant. Inferences. The indirect ELISA protocol which we apply for the cartilage tissue as an alternative to synovial lavage fluid is a reliable method which can be used in the determination of articular cartilage injury markers.
    02/2013; 2013:631959. DOI:10.1155/2013/631959
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    ABSTRACT: PURPOSE: Alterations in patellar height after high tibial osteotomy are found in many instances. Fibrosis of the tendon is implicated as the cause of the mechanism of patella lowering. This study aimed to determine the relationship between the position of the patella and the histopathological findings at the patellar tendon after high tibial osteotomy. METHODS: Nineteen knees in seventeen patients who were consecutively hospitalised for implant extraction are studied. All of the patients had previously undergone closing wedge osteotomy by the same surgeon at the same department. The median follow-up time is 15 months (range: 11-35). Five patients who all underwent high tibial osteotomy at the same time are also included in the study as a control group for histopathological evaluation. All of the patients are evaluated radiologically, patellar tendon biopsies are taken during the operation, and histopathological analyses are performed. RESULTS: The shortening of the patellar tendon is statistically significant (P < 0.05). The severity of the vascularisation, inflammation, and fibrotic change observed at the distal part of the tendon is evident. However, there is no statistically significant correlation between these findings and the degree of shortening. CONCLUSIONS: The shortening of the tendon occurs as a result of adherence in the distal part of the tendon. It would appear that it is this shortening that causes the difficulties encountered during arthroplasty surgery of osteotomy patients, and not patella infera. LEVEL OF EVIDENCE: Retrospective study, Level II.
    Knee Surgery Sports Traumatology Arthroscopy 11/2012; 22(7). DOI:10.1007/s00167-012-2293-y · 2.68 Impact Factor
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    ABSTRACT: Gastrointestinal stromal tumors are rare tumors. They commonly metastasize within the abdominal cavity, particularly to the liver. Less commonly, metastases can be found in the bone. We here present a case of metastasis to the scapula in a 54-year-old Caucasian male patient with an advanced gastrointestinal stromal tumor, which was subsequently successfully treated with resection and sunitinib. The present study is, to the best of our knowledge, the second to describe scapular metastasis of a gastrointestinal stromal tumor. Our patient was treated by scapulectomy. The overwhelming majority of scapular tumors are metastases that arise from soft tissue, hepatocellular and thyroid tumors. Gastrointestinal stromal tumor metastasis occurs rarely. Scapular surgery can successfully provide local control of the disease. After the surgery, patients should continue with medical treatment.
    Journal of Medical Case Reports 06/2012; 6(1):145. DOI:10.1186/1752-1947-6-145
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    ABSTRACT: The aim of this study was to evaluate prognostic factors, survival rate and the efficacy of the treatment modalities used in patients with extraskeletal Ewing's sarcoma. Data of patients with extraskeletal Ewing's sarcoma followed up at our center between 1997 and 2010 were retrospectively analyzed. The median age of 27 patients was 24 years (range, 16-54 years). The median follow-up was 31.8 months (range, 6-144 months). Tumor size was between 1.5 and 14 cm (median: 8 cm). Eighty-five percent of patients had localized disease at presentation and 15% had metastatic disease. Local therapy was surgery alone in 16% of patients, surgery combined with radiotherapy in 42% and radiotherapy alone in 27%. All patients were treated with vincristine, doxorubicin, cyclophosphamide and actinomycin-D, alternating with ifosfamide and etoposide every 3 weeks. In patients with localized disease at presentation, the 5-year event-free survival and overall survival were 59.7 and 64.5%, respectively. At univariate analysis, patients with tumor size ≥ 8 cm, high serum lactate dehydrogenase, metastasis at presentation, poor histological response to chemotherapy and positive surgical margin had significantly worse event-free survival. The significant predictors of worse overall survival at univariate analysis were tumor size 8 ≥ cm, high lactate dehydrogenase, metastasis at presentation, poor histological response to chemotherapy, radiotherapy only as local treatment and positive surgical margin. Prognostic factors were similar to primary osseous Ewing's sarcomas. Adequate surgical resection, aggressive chemotherapy (vincristine, doxorubicin, cyclophosphamide and actinomycin-D alternating with ifosfamide and etoposide) and radiotherapy if indicated are the recommended therapy for patients with extraskeletal Ewing's sarcoma.
    Japanese Journal of Clinical Oncology 03/2012; 42(5):420-6. DOI:10.1093/jjco/hys027 · 1.75 Impact Factor
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    ABSTRACT: To investigate histopathological changes in ureteropelvic junction obstruction (UPJO) from an etiological perspective. Medical records of patients with UPJO were reviewed and pathological specimens collected. Nephrectomy materials from forensic autopsies were taken as controls. Specimens were assessed with light microscopy. Fibronectin, type 4 collagen, laminin, Bax and Bcl-2 expression for apoptosis, together with interstitial cells of Cajal determination with c-kit were determined immunohistochemically. Staining scores were evaluated semiquantitatively. Results were evaluated using Mann-Whitney U-test. Control group comprised 14 children (median age, 3.5 years; 6 months-17 years). Study group comprised 22 children with UPJO (median age, 9 months; 1 month-10 years). Light microscopy revealed non-specific inflammation, epithelial proliferation and atrophy with fibrosis in the smooth muscle of the UPJ in all patients. Fibronectin, type 4 collagen and laminin were found to be significantly increased in UPJO at the intrafascicular space of smooth muscle and the matrix of stroma. Bcl-2 expression was increased in UPJO. c-Kit was unable to stain interstitial cells of Cajal, but staining for mast cells was significant. High expression of fibronectin, laminin and type 4 collagen may indicate a relation to the pathogenesis of UPJO. Defective kidney morphogenesis, during branching and tubulogenesis of ureteric bud, may be responsible for this congenital pathology.
    Journal of pediatric urology 09/2009; 6(2):125-9. DOI:10.1016/j.jpurol.2009.07.011 · 1.38 Impact Factor
  • EJC Supplements 09/2009; 7(2):595-595. DOI:10.1016/S1359-6349(09)72006-3 · 2.71 Impact Factor
  • EJC Supplements 09/2007; 5(4):407-408. DOI:10.1016/S1359-6349(07)71495-7 · 2.71 Impact Factor
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    ABSTRACT: This investigation was conducted to evaluate the presence of estrogen and androgen receptors in penile tissues of patients with hypospadias. The biopsy specimens from prepuce, glans, and urethral plate were sampled during the hypospadias surgery in five patients and were analyzed immunohistochemically. Twelve specimens were investigated for the presence of estrogen or androgen receptors (n: 24); the result was negative in 9 (37%) and positive in 15 (63%). Estrogen receptors were present in 10 specimens (42%) (prepuce: 5, glans: 3, and urethral plate: 2). Androgen receptors were present in 5 specimens (21%) (prepuce: 3, glans: 1, and urethral plate: 1). There was expression of both estrogen and androgen receptors in 5 specimens and only estrogen receptors in the remaining 5. Dominant expression of estrogen receptors in penile tissues of children with hypospadias may be the postnatal finding of disrupted estrogen and androgen receptor interaction during the intrauterine development of external genitalia.
    Archives of Andrology 01/2007; 53(2):83-5. DOI:10.1080/01485010601166862 · 0.89 Impact Factor
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    ABSTRACT: Although hepatic arteriovenous malformations are rarely reported, they frequently have life-threatening complications such as cardiac failure and are associated with a high mortality rate. Consequently, accurate prenatal and early postnatal diagnosis is important and therapeutic procedures depend on the imaging features. We report the early postnatal sonographic, Doppler sonographic, multidetector CT and CT angiography findings of a congenital hepatic arteriovenous malformation in a newborn.
    Pediatric Radiology 12/2006; 36(11):1204-7. DOI:10.1007/s00247-006-0285-0 · 1.65 Impact Factor
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    ABSTRACT: Embryonal rhabdomyosarcoma of the common bile duct is a very rare malignancy of childhood. The radiological appearance of the lesion is similar to that of congenital choledochal cyst if there is no local invasion to the adjacent tissues. The authors present a case of embryonal rhabdomyosarcoma of the common bile duct which was considered to be a congenital choledochal cyst preoperatively, and they discuss this very rare childhood tumor, with a brief survey of the literature. In conclusion, it is important to know that this rare tumor can simulate congenital choledochal cyst; it should be considered in the differential diagnosis of obstructive jaundice in children.
    Journal of Hepato-Biliary-Pancreatic Surgery 02/2005; 12(3):263-5. DOI:10.1007/s00534-004-0959-7 · 1.60 Impact Factor
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    ABSTRACT: Epidural spinal metastasis of Ewing's sarcoma is rarely observed. We report on a rare case of purely epidural spinal metastasis of Ewing's sarcoma with pain and paraplegia, and describe the treatment and final outcome of the patient.
    Journal of B.U.ON.: official journal of the Balkan Union of Oncology 01/2005; 10(2):281-4. · 0.71 Impact Factor
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    ABSTRACT: The thermal effects of acute electric trauma to living cells show some variation patterns and kinetics for different body components (muscle, bone, blood-vein and skin). Thermal energy transfer is random with no preferred directions, but electrical energy transfer is vectorial in the direction of the current. In the present study, a total 50 white male Wistar Albino rats, body weight 250-300 g, have been used to study electrical injury mechanism with subsequent change in muscle perfusion at different post-traumatic stages. The muscle temperature was found to increase with a sudden jump from 35.3+/-1.2 to 75.2+/-7.6 degrees C. The bone temperature increased from 35.2+/-1.4 to 45.8+/-1.2 degrees C and decayed slowly within 600+/-90 s. The venous blood curves show a similar pattern to that of muscle with a sudden jump of temperature from 36.4+/-.9 to 40.5+/-3.1 degrees C. The core temperature showed a flat pattern with a slight increase from 36.1+/-0.8 to 37.3+/-0.6 degrees C and the peak temperature was found after 70+/-10 s. From the scintigraphic study, muscle perfusion was found to be a minimum 72 h after electric shock. The right hind limbs of all the rats (ground) exhibited more intense histopathological damages (electric burns) than the left fore limb (source).
    Burns 07/2004; 30(4):334-40. DOI:10.1016/j.burns.2003.11.009 · 1.84 Impact Factor
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    ABSTRACT: The purpose of this study was to determine the resultant changes in the bladder function after partial bladder outlet obstruction (BOO), with particular emphasis on the threshold voltage and on the role of NO. A total of 12 adult rabbits were used in the study. New Zealand-type rabbits were subjected to no intervention and 3 weeks duration of a partial outlet obstruction. They underwent an in vivo cystometric evaluation before and after the BOO, histological studies, bladder-strip stimulation studies using acetylcholine, electrical field stimulation, and relaxation studies using NO donor nitroprusside. Statistical significance was determined by two-way ANOVA for multiple variations and Student's t-test. Histology sections demonstrated smooth-muscle hypertrophy, hyperemia of the vessels in the wall and widely set mononuclear cell infiltration in the rabbits with partial BOO. Cystometry showed markedly decreased bladder capacities, and decrease of compliance from 4.3 +/- 1.8 to 1.6 +/- 0.3 in the obstructed group. Tissue bath studies demonstrated no meaningful change with cholinergic stimulation, increased contractility in response to electrical field stimulation, and increased threshold voltage values from 57.5 to 93.3 compared to controls. Nitroprusside did not induce relaxation of the neostigmine and acetylcholine-precontracted bladder in all animals. Hypertrophy was observed due to adaptation of the detrusor against the obstruction. During this adaptation period, bladder capacity decreases and the elasticity disappears, thus causing higher pressures with lesser volumes. In other words, compliance decreases. The neurogenic damage can be shown with increasing values of threshold voltage, and higher voltages are needed to start a contraction. Nitroprusside has no inhibitory effect on smooth-muscle tone in the rabbit bladder.
    European Journal of Pediatric Surgery 03/2004; 14(1):39-44. DOI:10.1055/s-2004-815779 · 0.98 Impact Factor
  • S Celayir, Z Ilçe, S Dervisoglu
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    ABSTRACT: The sex hormone receptors (oestrogen, androgen, progesterone) in the bladder were demonstrated in clinical studies by various authors in adult patients. But the presence of these receptors in childhood had not been investigated. The aim of this study was to assess the presence of sex hormone receptors in the bladder of male subjects in childhood. The study included 20 bladder biopsies from a total of 15 children. Biopsies were taken during open surgery and/or cystoscopic procedures for various indications from the bladder dome, trigonum and in the region of the bladder neck. All biopsies were routinely fixed and processed for histopathological assessment and investigated immunohistochemically to determine the sex hormone receptors in the bladder. The sex hormone receptors were demonstrated with different densities and locations. In particular, sex hormone receptors were found very frequently in biopsies taken from the bladder neck. Overall receptor positivity in the specimens was 90 % for progesterone, 65 % for androgen and 25 % for oestrogen. There was no receptor expression in the deeper tissues of the bladder wall. This preliminary study demonstrated: 1. Sex hormone receptors are present in children; 2. There was a female sex hormone (progesterone, oestrogen) receptor expression in male subjects; 3. The receptors are mainly localised at the bladder neck and in transitional epithelium of the bladder wall. We think that the sex hormone receptor map may be useful in the evaluation of lower urinary tract and specially bladder neck disorders in childhood in the future.
    European Journal of Pediatric Surgery 11/2002; 12(5):312-7. DOI:10.1055/s-2002-35951 · 0.98 Impact Factor
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    ABSTRACT: Appendiceal anomalies are extremely rare malformations that are usually found in adult population as an incidental finding during laparotomy due to another reason. When appendiceal duplications are detected in childhood, almost all the patients have serious associated intestinal, genito-urinary or vertebral malformations. Presented herein are a case of a huge (15 x 13 cm mass) appendiceal duplication in a child causing acute abdomen without an accompanying pathology, its differentiation from appendiceal and caecal diverticulum, and classification of appendiceal duplications with the review of literature.
    Techniques in Coloproctology 05/2002; 6(1):55-7. DOI:10.1007/s101510200010 · 1.34 Impact Factor
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    ABSTRACT: The combination of a thoracic cystic mass with vertebral anomalies on prenatal ultrasound suggests a neurenteric cyst. The outcome of such cysts mostly depends on the extent of the displacement and functional impairment of the adjacent organs and of the associated central nervous system defects. We present a case of a neurenteric cyst diagnosed on prenatal ultrasound at 34 weeks of gestation which was treated successfully in the early neonatal period.
    Ultrasound in Obstetrics and Gynecology 10/2001; 18(3):277-9. DOI:10.1046/j.0960-7692.2001.00506.x · 3.14 Impact Factor

Publication Stats

180 Citations
41.51 Total Impact Points


  • 1995–2013
    • Istanbul University
      • • Department of Cytopathology
      • • Department of Pediatric Surgery
      • • Department of Family Medicine (Cerrahpasa Faculty of Medicine)
      • • Department of Perinatology
      • • Department of Pediatric Pathology
      • • Department of Plastic and Reconstructive Surgery
      İstanbul, Istanbul, Turkey
  • 1999
    • Trakya University
      • Department of Plastic and Reconstructive Surgery
      Adrianoupolis, Edirne, Turkey