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M Tunç

Publications and source records attributed to M Tunç.

14 recordsLinked to original sources
PubMed2004

TGF-beta1 neutralizing antibodies decrease the fibrotic effects of ischemic priapism.

The objective of this study was to evaluate the possible role of transforming growth factor beta 1 (TGF-beta1) antibodies (ab) for the prevention of fibrotic effects of priapism in a rat model. In total, 30 adult Sprague-Dawley rats were divided into five groups. Priapism with 6 h (group 1), priapism with 6 h+ab (group 2), priapism with 24 h (group 3), priapism with 24 h+ab (group 4) and control (group 5). Priapism was induced with a vacuum erection device and a rubber band was placed at the base of the erect penis. At 1 h after the initiation of priapism, TGF-beta1 antibodies were given intracavernosaly. All rats underwent electrical stimulation of the cavernous nerve after 8 weeks. Intracavernous and systemic blood pressures were measured during the procedure. Rats in group 1 showed significantly higher (intracavernosal pressure (ICP) pressures to cavernous nerve stimulation and had higher ICP/BP ratios when compared to other groups. Similarly, histopathologic examination revealed less fibrosis in group 2, compared with the other groups. Consequently, TGF-beta1 antibodies antagonise the fibrotic effects of TGF-beta1, especially in cases with duration of priapism less than 6 h.

Animals↗
PubMed2000

Lymph nodal involvement by renal angiomyolipoma.

Angiomyolipoma of the kidney is a clonal neoplasm, apparently part of a family of neoplasms derived from perivascular epithelial cells. A 40-year-old woman presented with right flank pain and an otherwise non-significant medical history. An abdominal computed tomography scan revealed an 18 cm solid mass in the mid-portion of the right kidney and multiple perihilar lymph nodes. Presumptive diagnosis was renal cell carcinoma. Right radical nephrectomy and a perihilar lymph node dissection was performed through a Chevron incision for the anticipated diagnosis of renal adenocarcinoma. The renal tumor was diagnosed as angiomyolipoma and a component was identified pathologically in a dissected lymph node. There was no evidence of tumor recurrence in the follow-up period of eight years. The consensus from other studies suggests that this phenomenon is a manifestation of the multicentric nature of angiomyolipoma, rather than due to metastasis. Genetic studies may resolve this question in the future.

Adult↗
PubMed2000

Discrepancy between Gleason scores of biopsy and radical prostatectomy specimens.

OBJECTIVE: The grade of the prostate cancer is an important factor in defining prognosis and deciding on treatment. In this study, we compared the Gleason score determined by 18-gauge core needle biopsies with both the Gleason score and pathological staging of the radical prostatectomy specimens. PATIENTS AND METHODS: Between July 1992 and September 1998, we performed 144 radical retropubic prostatectomies for clinically localized prostatic carcinoma, after a negative frozen section in bilateral pelvic lymphadenectomy in all cases. Ten patients with pathologic stage T1a and T1b were excluded. The final study group consisted of 134 patients, all of whom had been diagnosed with adenocarcinoma by transrectal needle biopsies with an 18-gauge automated spring-loaded biopsy gun. No patients received neoadjuvant therapy, including androgen deprivation and radiation therapy. All patients had a designated Gleason score on the needle biopsy and prostatectomy specimens. RESULTS: We found that grading error was greatest with well-differentiated (Gleason score 2-4) tumors, The accuracy was 15% for Gleason score 2-4 on needle biopsy. Of the 113 evaluable patients with Gleason score 5-7 on needle biopsy, 110 (97%) were graded correctly. All of the Gleason score 8-10 on needle biopsy was graded correctly. But only 1 patient in our series had Gleason score 8 on needle biopsy. Twenty-seven (25%) of 110 patients with a biopsy grade of Gleason score <7 had the cancer upgraded to 7. Of patients with both Gleason score <7 in the needle biopsy and Gleason score 7 in the prostatectomy specimen, only 3 (11%) had tumor confined to the prostate. CONCLUSION: The potential for grading error is greatest with well-differentiated tumors and of patients with both Gleason scores <7 in the needle biopsy and Gleason score 7 in the prostatectomy specimen, only 11% had tumor confined to the prostate. This effects treatment policy, especially for watchful waiting criteria.

Adenocarcinoma↗
PubMed1999

Treatment of idiopathic and postvaricocelectomy oligozoospermia with oral tamoxifen citrate.

OBJECTIVE: To identify a subgroup of men who may benefit from tamoxifen citrate (a widely prescribed drug for male infertility) among those with normogonadotrophic and hypergonadotrophic oligozoospermia, either idiopathic or after varicocelectomy. PATIENTS AND METHODS: The study included infertile men with oligozoospermia, 136 referred to our outpatient clinic and 84 infertile after varicocelectomy. All patients received tamoxifen citrate (10 mg twice daily); semen analysis and hormone tests were repeated at the end of 3 and 6 months of treatment, the values being compared with those before treatment. RESULTS: The levels of follicle-stimulating hormone, luteinizing hormone and testosterone increased in all groups receiving tamoxifen citrate. Normogonadotrophic patients had a significant increase in sperm count and concentration, while the slight increase detected in the hypergonadotrophic group was statistically insignificant. CONCLUSION: In patients with normogonadotrophic oligozoospermia, tamoxifen citrate may be offered as a practical and economic alternative before using any assisted reproduction techniques. However, double-blind placebo-controlled trials are needed to confirm the findings of this preliminary study.

Administration, Oral↗
PubMed1999

Hypothalamo-pituitary-adrenal axis and growth hormone axis in patients with rheumatoid arthritis.

Rheumatoid arthritis (RA) is a systemic disease and is associated with cytokines (IL-1, IL-6, TNF-alpha) production. There is little information on hypothalamo-pituitary-adrenal (HPA) axis and growth hormone (GH) axis in the patients with RA. We have, therefore, investigated these systems in twenty patients with confirmed RA. Ten of the patients had active and 10 patients remitted RA. Serum cortisol, ACTH and GH levels were measured in the basal state and after insulin induced hypoglycaemia. Cortisol, adrenocorticotropic hormone (ACTH) and GH responses were impaired in 65%, 85% and 30% of the patients, respectively. The basal and peak hormone levels were similar between the patients with active RA and the patients in remission. These findings indicate that there is an impairment in HPA and GH axis in patients with active and remitted RA. The site of this impairment is probably hypothalamus and/or pituitary gland.

Adolescent↗
PubMed1999

Orbital lymphangioma: an analysis of 26 patients.

AIM: To evaluate retrospective data on the clinical findings, histological features, radiological diagnosis, and management outcomes in orbital lymphangioma. METHODS: Data on 26 orbital lymphangioma patients managed over 16 years were re-evaluated. The computed tomograph and magnetic resonance scans and histological slides were reviewed. Parametric techniques were used to assess correlations among clinical, radiological, and histopathological factors. RESULTS: At presentation proptosis was present in 85%, ptosis in 73%, and restrictive eye movements in 46% of patients. The accuracy of the initial radiology interpretations was 77%. 24 cases required one or more surgeries. The mean follow up was 9.2 years (range 1-14 years). 58% of patients developed recurrences. In cases that recurred, motility restriction was significantly more frequent at initial examination than cases without recurrence (p < 0.05). After therapy, 75% of patients were satisfied with their visual function and cosmetic appearance. CONCLUSIONS: Conservative management of orbital lymphangioma with multiple partial resections may achieve satisfactory results.

Adolescent↗
PubMed1998

Labeling of penicillamine di sulfide with technetium-99m.

Complex forming conditions of Penicillamine di sulfide with 99mTc have been specified. Labeling of penicillamine di sulfide with 99mTc by direct reduction with SnCl2 did not give favorable good results while the 99mTc complex of penicillamine can be easily obtained. Ligand exchange reaction with 99mTc-gluconate was attempted and a 95% labeling efficiency was obtained. Radiopharmaceutical potential of 99mTc-PADS (99mTc-Penicillamine di sulfide) has been investigated with a gamma camera in rabbits and the complex was found to be uptaken mostly by the liver and kidneys.

Animals↗
PubMed1998

Primary pure choriocarcinoma of the ovary in reproductive ages: a case report.

Choriocarcinoma is an aggressive tumor with cyto- and syncytiotrophoblastic cells. It arises gestationally or nongestationally. Nongestational choriocarcinoma of the ovary can be pure or mixed with other germ cell tumors. Pure type is less frequent than mixed type and the diagnosis of nongestational choriocarcinoma of the ovary is very difficult in the reproductive period. A case of a 20-year-old woman with pure choriocarcinoma of the ovary is presented with a review of the literature and discussion of its origin.

Adult↗
PubMed1996

Ocular findings in 55 patients with Down's syndrome.

Fifty-five patients with Down's syndrome were examined to evaluate the characteristics and frequency of ocular findings. Of these patients, 29 (52.7%) were hypermetropes, 7 (12.7%) were emmetropes, and 7 (12.7%) were myopes; astigmatism of more than 3.00 diopters was present in 7(12.7%) patients. Strabismus was observed in 12 (21.8%) patients. All but one of these 12 patients also had esotropia. Congenital nasolacrimal duct obstruction was present in 12 subjects (21.8%). Blepharitis was found in 19 (34.5%) cases. Nystagmus occurred in 7 (12.7%) patients. Brushfield spots were detected in only 20 (36.3%) of the patients and were more common in light-colored irides. Lens opacities were diagnosed in 11 (20%) patients, and two underwent successful cataract surgery. On fundus examination, an increased number of retinal vessels crossing the optic nerve head was detected in 21 (38.1%) cases. One of the patients had a retinal detachment. Significant but correctable ocular problems are present in patients with Down's syndrome and may interfere with the quality of life of the patient and with binocular vision. Surgical intervention may be needed for strabismus and for cataracts.

Adolescent↗
PubMedDate not supplied

Chondrosarcoma diagnosed by fine needle aspiration cytology.

OBJECTIVE: To define and discuss the cytologic findings in 6 conventional chondrosarcomas (CS), 1 chondroblastic osteosarcoma, 1 extraskeletal myxoid CS and 20 chondroma cases. STUDY DESIGN: Study of fine needle aspiration cytology (FNAC) of cases air dried and May-Grünwald-Giemsa stained. RESULTS: Tumor cells were embedded in a pink, amorphous, chondroid matrix in conventional CS. They were larger than chondroma cells and had vacuoles and small, pink, chondroid substance-like granules. Chondroblastic osteosarcoma was diagnosed as high grade CS by FNAC, but extremely pleomorphic chondrocytes, osteoid matrix, osteoblastic cells, and clinical and radiologic findings should have produced the proper diagnosis. Extraskeletal myxoid CS had a pinkish, granular, myxoid background. The tumor cells had granulated, dark blue cytoplasm and oval-round, lobulated, slightly indented, hyperchromatic nuclei. CONCLUSION: FNAC is efficient for the diagnosis of CS and its variants as long as it is evaluated with radiologic and clinical findings by a pathologist familiar with bone pathology and cytology.

Adult↗