Rare solitary fibrous tumor of the stomach: A case report.

INTRODUCTION: Solitary fibrous tumors are rare soft tissue tumors of submesothelial origin and variable malignant potential. The most common localization is pleural, whereas only 0.6% are of extrapleural localization. Solitary fibrous tumor of the peritoneum, especially of gastric serosa is an extremely rare form of this tumor. CASE REPORT: We presented a 65-year-old female patient with solitary fibrous tumor of the stomach. Histopathological analysis of removed tissue showed the presence of tumor tissue built of spindle cells, elongated nuclei with moderately abundant cytoplasm. Cells were in a noncohesive arrangement, in smaller areas distributed in the form of palisade. There were amounts of hipocellular connective tissue, hyalinised, with small foci of dystrophic calcification. Mitoses were rare (less than 3/10 HPF). Blood vessels surrounded the connective tissue. Reviewed material did not contain elements of the parent organ. Immunohistochemically there were positivity on CD34 and vimentin, and negativity to S100, SMA, CD117, dezmin, and Ki-67 is < 2%. The change was diagnosed as a solitary fibrous tumor. CONCLUSION: Considering that benign solitary fibrous tumors of extrathoracic localizations are extremely rare neoplasms with unpredictable biological behavior and the possibility of recurrence, a long-term clinical and endoscopic follow-up on yearly basis of patients with this disease is recommended.

Preservation surgery in patients with localized renal cell cancer--nephron sparing surgery.

INTRODUCTION: Renal Cell Cancer ( RCC) is third most frequent urological cancer behind Prostate cancer and Bladder cancer. It represents 2-3 % of all cancers with annual increase in incidence of 2% in Europe (except Denmark and Sweden) and worldwide. Surgery is the only curative procedure, performed as radical nephrectomy (RN) or partial nephrectomy (nephron sparing surgery-NSS). Radical nephrectomy consists of nephrectomy with ipsilateral adrenalectomy and lymphadenetomy, but partial nephrectomy means resection of the tumor only with 1-3 mm of healthy surrounding tissue and preservation of the rest of the kidney as well as ipsilateral adrenal gland and lymph nodes. NSS is a method of conservation of attacked kidney and preservation of kidney's function with previous radical resection of localized RCC, respecting of all oncological principles. The aim of this study is to describe NSS procedure in details and present results of its 13 year use at Clinic of Urology in Novi Sad. MATERIAL AND METHODS: In the last 13 years there were 868 patients (pts) with RCC. NSS has been performed in 242 pts (27.88%). Bilateral tumors: synchronous 8 pts, asynchronous 3 pts. Better kidney has been operated, first. Indications for NSS were: absolute--34 pts (15.0%), relative--58 pts (23.1%) and elective--150 pts (61.9%).Surgery was performed according to esta- blished protocol for this procedure based on recommendation of Prof. A. Novick, Cleveland, USA. RESULTS: All patients underwent surgery under general anesthesia through lumbothomy, mostly.Tumor size was between 2.5-4.5 cm: over 4.5 cm (4-7 cm): 4 pts. Average age of pts--63.5 years (37-84), male: 148 (61.1%), female: 94 (38.9%). From 2001-2005, 2006-2010 i 2011-2013, 39,111 i 92 NSS has been done, respectively. It represented 13.5%, 36.6% , 50.54% of all pts with RCC underwent surgery in that period, respectively. There was an increase of NSS in that period compared to RN for localized RCC. There were no death outcomes inpts underwent NSS, local recurrence was seen in 1 patient (0.6%), urine leakage > 2 weeks 5 pts (5/242 = 2.06%),severe hemorrhage: 3 pts (1.23%), nephrectomy has been done. We do not have patients with von Hippel Landau (VHL) disease. CONCLUSION: Nephron sparing surgery Is the first choice of surgery for patients with low grade kidney tumors (up to 4.5 cm, even 7 cm), has excellent onco- logical results-comparable with radical nephrectomy, but with preservation of renal function and should be done by an experienced urological team in specialized urological centers with good anesteziological support.

Double primary tumors-renal cell carcinoma and duodenal mucinous adenocarcinoma.

A 59-year old patient was admited to the Gastroenterology Clinic with the signs of gastrointestinal bleeding. Computerized tomography (CT) and a barium-meal radiography revealed a circumferential nodular wall narrowing and incomplete stricture at the D2 part of the duodenum. CT also showed a poorly demarcated mass in the upper and lower poles of the left kidney. During the operation, the whole kidney together with the tumor was removed and also a part of the duodenum. Morphological features of both tumors were typical and distinctive enough to set the diagnosis of two independent primary tumors. The possibility of one being the metastasis of the other was excluded. The diagnosis of double primary malignant neoplasms - renal cell carcinoma and duodenal mucinous adenocarcinoma was made.

[Hormonal status in patients with advanced prostatic cancer on the therapy with androgen blockade].

BACKGROUND/AIM: Hormone suppression therapy is used in men with advanced prostate cancer improving chances of longer survival. The aim of this study was to investigate the influence of androgen blockades on testosterone and luteinizing hormone (LH) values in patients with locally advanced and metastatic prostatic cancer. METHODS: The study included a total of 60 patients out of which 45 with prostatic cancer divided into 3 subgroups based on the type of the applied treatment protocol: 15 patients on monotherapy with luteinizing-releasing hormone (LH-RH) agonists (group I), 15 patients on total androgen blockade (group II) and 15 patients on monotherapy with antiandrogen (group III)). The control group consisted of 15 patients with benign prostatic hyperplasia. In all the patients, values of testosteron, LH and prostate-specific antigen (PSA) were monitored initially, as well as 3 and 6 months after the treatment protocol introduction. RESULTS: In the patients of the groups I, II and III, values of testosterone decreased after three months by 95.58%, 95.72%, and 67%, respectively. The difference was significant (p < 0.01). Between the values after three and six months there was no significant difference in these groups of participants. Testosterone values were significantly higher in the patients of the group III in both analyses. Comparing the values between the groups III and I, as well as those of the groups III and II, a significant difference was found after three and six months of the therapy (p < 0.01). There was a difference in testosterone values between the groups I and II after 3 and 6 months, but not significant. All types of the applied treatment protocols in the therapy of prostatic cancer significantly decreased the values of LH compared to the basal ones. CONCLUSION: Total androgen blockade and LH-RH agonists are more effective in lowering testosterone values (to castration values) compared to the antiandrogen monotherapy, where testosterone values stay above the castration level. This therapy approach has advantages, since it decreases testosterone values providing better therapy response. There is a difference in testosterone values, but not significant, when total androgen blockade and monotherapy with LH-RH agonists are administered. Registered lower basal values of LH in all patients with prostatic cancer open the possibility to introduce LH as a new additional, significant marker in diagnosis of this neoplasm.

[Radical cystectomy--analysis of postoperative course].

BACKGROUND/AIM: Radical cystectomy is a method of choice in the therapy of infiltrative bladder cancer. The aim of this research was to analyze postoperative course after radical cystectomy (length of hospitalization, most frequent complications and utilization of antibiotics and transfusions). METHODS: We analyzed the records of 82 patients operated on in the Department of Urology, Clinical Center of Vojvodina, in a three-year period. In order to aquire data World Health Organization (WHO) has developed Anatomical Therapeutic Chemical/Defined Daily Dose (ATC/DDD) methodology. Defined daily dose (DDD) is the assumed average maintenance dose per day for a drug use for its main indication. RESULTS: Continent urinary derivation was preformed in 23.15% cases. Postoperative complications occurred in 18.29% of patients. Average blood utilization was 2.19 units. Blood utilization for continent derivations (n=48) was 4.6 units, and incontinent ones 3.36 units. Totally 159.33 DDD/100 bed days were used. CONCLUSION: When preforming continent derivation there is a significant increase in blood utilization. Frequency of postoperative complications correlates to those reported in the literature.