Marko Nikolić

General Hospital Zabok, Забок, Krapinsko-Zagorska, Croatia

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Publications (26)29.7 Total impact

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    ABSTRACT: Laparoscopic gastric banding (LAGB) is one of the most common surgical procedures in the treatment of morbid obesity since it provides good long-term outcomes in weight loss and decrease of comorbidities associated with obesity. Although the procedure has low morbidity and almost none-existing mortality, certain complications can occur. Erosion of the band into the gastric wall is one of the rare complications in LAGB. The reported incidence varies from 1 to 11%, however the largest study reported an incidence of 1.6%. This is in accordance with the incidence in our Centre for obesity, where only one case of erosion occurred among 112 operative procedures. The aim of this paper is to present a patient with gastric band erosion and it's removal by using the endoscopic techniques as a minimally invasive management method.
    Collegium antropologicum 03/2014; 38(1):345-8. · 0.61 Impact Factor
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    ABSTRACT: Waldenström's macroglobulinemia is a distinct clinicopathologic entity defined as a B-cell neoplasm characterized by lymphoplasmacytic infiltrate in the bone marrow, with an associated immunoglobulin (Ig) M paraprotein. Clinical manifestations are due to deposition of IgM in the liver, spleen, and/or lymph nodes, so it presents with anemia, hyperviscosity, lymphadenopathy, hepatomegaly, splenomegaly and neurologic symptoms. The main diagnostic criteria are a typical peak on serum protein electrophoresis and malignant cells in bone marrow biopsy samples. There is no standard therapy for the treatment of symptomatic Waldenstrom's macroglobulinemia and no agents have been specifically approved for this disease, but initial treatment usually starts with the monoclonal anti-CD20 antibody rituximab, either alone or in combination with other agents, rather than chemotherapy alone. This article confirms that, despite the existence of more modern imaging methods, ultrasonography still has a significant diagnostic role.
    Acta clinica Croatica. 03/2014; 53(1):94-7.
  • Endocrine 10/2013; · 3.53 Impact Factor
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    ABSTRACT: Strictures are one of the most common complications of Crohn's disease. If symptomatic and resistant to medical anti-inflammatory therapy, and especially in cases of acute obstruction, surgical correction may be unavoidable. Although surgical treatment is dramatically effective in curing Crohn's disease strictures, a high rate of postsurgical restenosis has been recognized, ultimately requiring additional surgery. To avoid the risks and costs entailed by repeated surgical resection, endoscopic balloon dilatation (EBD) has been proposed as a conservative treatment option for intestinal strictures in Crohn's disease, in which the stricture is pneumatically dilated with through-the-scope balloons of different diameters. The main clinical indication for EBD is the appearance of obstructive symptoms associated with the stricture, especially if they are postoperative and shorter than 4 centimeters. Usually more than one dilatation session is required for every stricture. EBD is applied infrequently, possibly due to the perceived risk of perforation and early stricture recurrence, but studies have demonstrated that EBD has a high success rate, a low chance of complications, excellent symptomatic response, as well as good short-term and long-term outcomes, proving that it is a relatively simple and successful technique that provides long-term effective palliation of the symptoms with minimal risk in patients with simple strictures, and offers a reasonable alternative to surgery.
    Acta clinica Croatica 09/2013; 52(3):374-9. · 0.28 Impact Factor
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    ABSTRACT: A giant retroperitoneal liposarcoma that incorporated the descending colon was presented clinically as a palpable abdominal mass in a 37-year-old male patient. Complete surgical resection with adjacent partial colectomy was performed. Total tumor mass was 10.7 kg and pathological examination revealed well differentiated ("lipoma-like") liposarcoma. Literature review shows that aggressive surgical resection remains the mainstay of treatment for retroperitoneal liposarcoma, although there are some promising results that support the use of adjuvant combination chemotherapy in advanced metastatic disease.
    Acta Clinica Croatica; Vol.46 No.4. 07/2013;
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    ABSTRACT: BACKGROUND: Peptic ulcer bleeding remains an important cause of morbidity and mortality. AIM: The aim of this study was to evaluate the prevalence of non-steroidal anti-inflammatory drugs (NSAID) use, Helicobacter pylori infection and non-H. pylori-non-NSAIDs causes of peptic ulcer bleeding and to identify the predictive factors influencing the rebleeding rate and in-hospital mortality in patients with bleeding peptic ulcer. METHODS: A total of 1,530 patients with endoscopically confirmed peptic ulcer bleeding were evaluated consecutively between January 2005 and December 2009. The 30-day mortality and clinical outcome were related to patient's demographic data, endoscopic and clinical characteristics. RESULTS: The age-standardized 1-year cumulative incidence for peptic ulcer bleeding was 40.4 cases/100,000 people. The proportion of patients over 65 years increased from 45.7 % in 2005 to 61.4 % in 2009 (p = 0.007). Overall 30-day mortality rate was 4.6 %, not significantly different for conservatively and surgically treated patients (4.9 vs. 4.1 %, p = 0.87). Mortality was significantly higher in patients over 65 years of age and those with in-hospital bleeding recurrence. Patients with non-H. pylori-non-NSAID idiopathic ulcers had significantly higher 30-day mortality rate than those with H. pylori ulcers and NSAID-H. pylori ulcers (7.1 vs. 0 vs. 0.8 %, p = 0.001 and p = 0.007, respectively). There was no statistically significant difference between patients with NSAID ulcers and non-H. pylori-non-NSAID idiopathic ulcers in terms of 30-day mortality rate (5.3 vs. 7.1 %, p = 0.445). CONCLUSION: The incidence of peptic ulcer bleeding has not changed over a 5-year observational period. The overall 30-day mortality was positively correlated to older age, underlying comorbid illnesses, in-hospital bleeding recurrence and the absence of H. pylori infection.
    Digestive Diseases and Sciences 06/2012; · 2.26 Impact Factor
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    ABSTRACT: To compare the recurrent bleeding after endoscopic injection of different epinephrine volumes with hemoclips in patients with bleeding peptic ulcer. Between January 2005 and December 2009, 150 patients with gastric or duodenal bleeding ulcer with major stigmata of hemorrhage and nonbleeding visible vessel in an ulcer bed (Forrest IIa) were included in the study. Patients were randomized to receive a small-volume epinephrine group (15 to 25 mL injection group; Group 1, n = 50), a large-volume epinephrine group (30 to 40 mL injection group; Group 2, n = 50) and a hemoclip group (Group 3, n = 50). The rate of recurrent bleeding, as the primary outcome, was compared between the groups of patients included in the study. Secondary outcomes compared between the groups were primary hemostasis rate, permanent hemostasis, need for emergency surgery, 30 d mortality, bleeding-related deaths, length of hospital stay and transfusion requirements. Initial hemostasis was obtained in all patients. The rate of early recurrent bleeding was 30% (15/50) in the small-volume epinephrine group (Group 1) and 16% (8/50) in the large-volume epinephrine group (Group 2) (P = 0.09). The rate of recurrent bleeding was 4% (2/50) in the hemoclip group (Group 3); the difference was statistically significant with regard to patients treated with either small-volume or large-volume epinephrine solution (P = 0.0005 and P = 0.045, respectively). Duration of hospital stay was significantly shorter among patients treated with hemoclips than among patients treated with epinephrine whereas there were no differences in transfusion requirement or even 30 d mortality between the groups. Endoclip is superior to both small and large volume injection of epinephrine in the prevention of recurrent bleeding in patients with peptic ulcer.
    World Journal of Gastroenterology 05/2012; 18(18):2219-24. · 2.55 Impact Factor
  • World Journal of Gastroenterology 05/2012; 18(18-14):2219-24. · 2.55 Impact Factor
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    ABSTRACT: Arterio-enteric fistula is a rare, but potentially deadly cause of gastrointestinal bleeding. The disease occurs in two forms: primary as a result of atherosclerotic aortic aneurysm, aortitis, trauma, radiation, tumor invasion or penetrating ulcer, and secondary as a consequence of surgical aortal reconstruction. The clinical manifestation is mostly gastrointestinal bleeding, rarely back pain, fever and sepsis. Computed tomography with contrast medium is the most suitable diagnostic test, however, the diagnosis frequently requires explorative laparotomy. A case is presented of secondary arterio-enteric fistula, found two years after surgical treatment of chronic pancreatitis with pseudocystojejunostomy, which clinically manifested with gastrointestinal bleeding. Although there was strong suspicion of arterio-enteric fistula, the diagnosis was not verified by routine workup, but only on explorative laparotomy.
    Acta clinica Croatica 03/2012; 51(1):79-82. · 0.28 Impact Factor
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    ABSTRACT: Obesity is chronic disease with multiple health consequences and among the most severe health problems worldwide. According to public health records around 65% of population in Croatia are overweight and 20% obese. National physicians chamber with support of Health and Social Welfare Ministry gave recommendations on diagnosing and treating of obesity in form of national consensus. Treatment of obesity is complex and enrolls multiple clinical specialties. Change of life style, strenuous physical activity and pharmacotherapy are part of conservative treatments. Patients are treated more efficiently by minimally invasive endoscopic procedures or bariatric surgery depending on starting body mass index score. Implantation of intragastric balloons is conceptually simple method of obesity treatment. Modern devices as Bio-Enterics intragastric balloons (BIB), (Inamed Health, USA) are gaining wide popularity among both patients and physicians. BIB intragastric offers the best gains with individuals ranging BMI from 35 to 40. Efficiency has relative timeline dependance from 85% at 6 months to 24% at 36 months. BIB offers substantial ameliorative influence on obesity comorbidities, particularly cardiovascular risk. Treatment with BIB is also efficient but transient treatment modality in morbidly and superobese individuals to reduce preoperative risks of general and bariatric surgery. Obesity treatment with BIB is well tolerated and safe, offering better quality of life. Nevertheless, due to relative poor results of conservative obesity treatments on long-term follow up further investigations defining new clinical parameters for solving treatment resistance. In order to provide resourcefully individualized approach modern perspectives are focused on endocrine constitutes of obesity. Hormonal effects of BIB treatment in compare to bariatric surgery are potentially interesting for the prospect studies.
    Collegium antropologicum 12/2011; 35(4):1353-62. · 0.61 Impact Factor
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    ABSTRACT: Morbid obesity is currently one of the leading problems worldwide. More than 1 of 5 adults in Croatia are considered obese, with a body mass index (BMI) higher than 30 kg/ m(2), with no sex differences. Indications for bariatric surgery are BMI >40 kg/m(2) or BMI >35 kg/m(2) with comorbidities. Bariatric procedures are divided into restrictive, malabsorptive, and combined procedures. The Roux-en-Y gastric bypass is a combined bariatric procedure, already being accepted as the standard one in the USA and gaining ground in Europe as well. A 47-year-old woman with BMI of 48.2 kg/m(2) (105.5 kg) was hospitalized at our department. Her increasing attempts to lose weight using conservative methods showed no success. She also suffered from glucose intolerance, gastritis, chronic obstructive pulmonary disease, hypertension and depression as comorbidities. Based on our experience in bariatric surgery (gastric banding, sleeve gastrectomy, duodenal switch), we decided for the first time in our hospital to perform laparoscopic Roux-en-Y gastric bypass. The patient was released on the fifth postoperative day with BMI of 40.56 kg/m(2) (100 kg body weight), excess weight loss 12.5%. One month after the procedure, her BMI was 38.54 kg/m(2), excess weight loss 23.92% (body weight 95 kg).
    Acta clinica Croatica 06/2011; 50(2):239-43. · 0.28 Impact Factor
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    ABSTRACT: Ghrelin and leptin recently emerged as the most influential neuroendocrine factors in the pathophysiology of obesity. The said peptides act in reciprocity and are responsible for regulation of appetite and energy metabolism. Intragastric balloons acquired worldwide popularity for obesity treatment. However, the roles of ghrelin and leptin in intragastric balloon treatment were still not systematically studied. A prospective single-center study included 43 Caucasians treated with BioEnterics intragastric balloon, with age range of 18-60, and divided to non-morbid (body mass index cutoff 40 kg/m(2)) or morbid type of obesity, with 12 months follow-up. Serum hormonal samples were taken from fasting patients and kept frozen until analyses. Significant differences were observed in anthropometrics and there were no differences between genders or comorbidities. The baseline weight for non-morbid vs. morbid was 104 kg (90-135) vs. 128.5 kg (104-197). Weight loss was statistically different between the studied groups during the study course with a median control weight at 6 months of 92 kg (72-121) vs. 107 kg (84-163), p < 0.001. Treatment was successful for 18 (94.7%) vs. 16 (66.7%) patients, p = 0.026. Ghrelin varied from 333.3 to 3,416.8 pg/ml and leptin from 1.7 to 61.2 ng/ml, with a statistically significant time-dependent relationship. A significant difference (p = 0.04) with emphasized ghrelin peak was found in the 3rd month of treatment for non-morbidly obese subjects. The importance of ghrelin and leptin in treatment-induced changes was reaffirmed. Ghrelin hyper-response in non-morbidly obese subjects characterized greater short-term treatment efficiency and landmarked an inclination to weight regain. The results suggest a potential pattern of individualization between obese patients according to body mass index towards intragastric balloon or bariatric surgery. Further studies are needed in order to get better insights in the pathophysiologic mechanisms of obesity.
    Obesity Surgery 04/2011; 21(10):1597-604. · 3.10 Impact Factor
  • Hepatogastroenterology. 03/2011; 58(106-Mar-Apr):438-43.
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    ABSTRACT: Gastrointestinal stromal tumors (GISTs) are mesenchymal tumors with variable malignant potential. Connexin-43 (Cx43) is the commonest gap-junction protein and has been frequently investigated in oncology. Our aim was to establish the immunohistochemical expression of Cx43 in relation to GIST location, size, Ki67 index, tumor grade and follow-up.? The study included postoperative samples of 46 patients treated for GIST in the 1999-2010 time frame. Complete clinical workup was available for 38 patients (82.6%); total surgical resection was carried out in 32 (84.2%) patients, while 13 (34.2%) patients underwent chemotherapy. Median follow-up was 40.7 months (range, 1-134). ? The calculated incidence of GIST in our setting was 11.5 per million. Cx43 was expressed in 43/46 (93.5%) GIST cases, with a significant difference between stomach- and small intestine-derived tumors (p=0.006). Ki67 was 10% on average (range, 1-22) and was not correlated with tumor location (p=0.194). Cx43 did not show significance with regard to tumor size (p=0.264) or higher tumor grade (p=0.658), as opposed to Ki67, which significantly correlated with both (p=0.0048 and p<0.001, respectively). Cx43 and Ki67 were not significantly correlated (p=0.708). Ki67 correlated with time to recurrence (p=0.022). Ki67 >11% was taken as the indication to start imatinib chemotherapy (sensitivity 61.5%, specificity 92.0%, p=0.022). Ten (66.7%) of 15 patients with long-term (>5 years) follow-up were in remission.? Cx43 was frequently expressed in GISTs regardless of tumor site. However, no significant relationships to histopathological parameters suggestive for prognosis were found. Further investigations might clarify the roles of Cx43 in GIST oncogenesis.
    The International journal of biological markers 01/2011; 26(2):124-8. · 1.59 Impact Factor
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    ABSTRACT: This prospective randomized trial compares the efficacy of N-butyl-2-cyanoacrylate injection and variceal ligation in emergency endoscopic treatment of acute esophageal variceal hemorrhage in patients with portal hypertension and chronic liver disease. Between January 2004 to December 2008 43 patients with endoscopy-proven acute esophageal variceal hemorrhage were randomly assigned to one of the two treatment groups: endoscopic injection with N-butyl-2-cyanacrylate (n=22) and endoscopic variceal ligation (n=21). Vital signs, the amount of blood transfusion and infection status were recorded before and after endoscopic treatment. Within two weeks after initial endoscopic treatment, prophylactic variceal ligation was performed until the varices were eradicated. Success in arresting acute bleeding was no different in either group. The re-bleeding rate was higher in the cyanoacrylate group than the ligation group (13.6% us. 4.7%), with no statistical difference (p=0.60692). The mean amount of blood transfused was similar in both groups. Ten (45.5%) patients in the cyanoacrylate group and 7 (33%) in the ligation group died during an observational period of 14.1 +/- 13.9 months and 21.0 +/- 17.2 months, respectively (p=0.3272). The efficacy of endoscopic injection therapy with N-butyl-2-cyanoacrylate to control acute esophageal variceal hemorrhage showed no difference to endoscopic variceal ligation nor did the esophageal variceal re-bleeding rate and mortality rate.
    Hepato-gastroenterology 01/2011; 58(106):438-43. · 0.77 Impact Factor
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    ABSTRACT: Gallstone ileus with impaction of gallstone in distal duodenum is an extremely rare complication of cholecystolithiasis. Gallstone ileus in itself accounts for less than 1% of these complications with 800 cases described so far. However, there are less than 15 cases described with the impaction of gallstone in distal duodenum. We report a case of an 84-year-old male patient in whom gallstone impacted in distal duodenum was found by ultrasonography and confirmed by computed tomography. Cholecystitis and a remaining large gallstone in the gallbladder were found intraoperatively, which made us opt for one-step procedure, i.e. lithotomy and fistula repair with cholecystectomy. Due to the rare position of impacted gallstone, we believe that cases like this should be reported in detail in order to generate enough data for establishing optimal treatment options.
    Acta clinica Croatica 09/2010; 49(3):305-8. · 0.28 Impact Factor
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    ABSTRACT: Gastrointestinal stromal tumors (GISTs) are mesenchymal neoplasms most frequently found in the stomach and presenting without symptoms or with unspecific ones such as hemorrhage and abdominal pain. The malignant potential of GIST is variable and there are several prognostic indexes for treatment and follow up. The superior diagnostic method is endoscopic ultrasound combined with fine needle aspiration biopsy (EUS-FNA) immunocytochemistry. Surgery is the preferable treatment option, while recurrent or advanced disease is best managed with thyrosine kinase inhibitors. We report a case of a 20-year-old man that presented with gastrointestinal bleeding and anemia. Upper gastrointestinal endoscopy detected a submucosal lesion and computerized tomography revealed a node near the liver. EUS-FNA immunocytochemistry found CD-117 positive cells suggestive of GIST and the patient was operated on. The diagnosis was confirmed by histopathology with immunostaining. Prognostic assessment was done according to tumor size and Ki-67 index with mitosis count on microscopy. Many studies have shown that tumors demonstrate an abnormal number, structure and occurrence of connexin proteins with altered connexin-mediated intercellular communication. Since a great deal of gastroenterological tumors express connexin 43, our aim was to find out whether it was present in GIST. Immunohistochemically, the tumor was positive for connexin 43, which was not previously described as typical. The early postoperative course was uneventful, free from complications. At three-year postoperative follow-up, the patient was subjectively well and without clinical signs of disease recurrence.
    Acta clinica Croatica 09/2010; 49(3):359-63. · 0.28 Impact Factor
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    ABSTRACT: This study aims to assess the effectiveness, tolerance, safety, and patient satisfaction of obesity treatments using the Bioenterics intragastric balloon (BIB). Prospective controlled trial of 33 obese patients who were treated with the BIB from March 2008 to March 2009 and who completed the 6 months treatment. Patients were selected on the basis of workup by a multidisciplinary team. The 33 obese patients (26 females, seven males) had a median age of 35 years (range 20-58). Their median baseline body weight (BW) was 114 kg (range 89-197) and their median body mass index (BMI) was 41.4 kg/m(2) (range 31.2-60.8). Average weight reduction was 14 kg (range 2-37), loss total weight 10.1% (range 1.4-23.1), control BMI 35.6 kg/m(2) (range 29.4-50.3), delta BMI 4.5 (range 0.6-13.1), percentage excess weight loss 29.2 (range 2.8-53.6), and percent of excess BMI loss 29.3 (range 2.7-67.4). In one female patient the BIB was removed early due to intolerance. During the first week, minor side effects were noticed: nausea/vomiting occurred in 21 patients (63.6%), and abdominal cramps in 15 (45.5%). There was one balloon deflation and one impaction in the stomach. Those incidents were both successfully treated endoscopically. Patients had no major complications from mucosal lesions and no need for surgical interventions. All intragastric balloons were successfully removed endoscopically. Patients' treatment satisfaction correlated with the degree of BW loss (p = 0.0138). BIB treatment in our setting showed the best results for individuals with BMI from 35 to 40 kg/m(2). Our preliminary results showed that BIB is safe, well tolerated with minor side effects, and alters quality of life for the better. The complication rate was negligible, due to the detailed pretreatment examinations and follow-up.
    Obesity Surgery 03/2010; 21(8):1305-10. · 3.10 Impact Factor
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    ABSTRACT: Pancreatic cancer has a dismal prognosis and complete surgical removal remains the only potential curative treatment. The principle goal of preoperative evaluation is to identify patients with potentially resectable disease while avoiding surgical exploration in those with unresectable disease. There is no evidence-based consensus on the optimal preoperative imaging assessment of patients with suspected pancreatic cancer. Because of its widespread availability, computed tomography (CT) is usually the initial study for this indication, although endoscopic ultrasonography (EUS) is the most sensitive imaging modality for the detection of pancreatic masses. Due to anatomical limitations, CT and magnetic resonance (MR) are superior to EUS for detection of metastatic disease. EUS is superior to CT and angiography for detection of tumor invasion of the portal vein or confluence. Most studies found no significant differences between EUS, CT and MRI in determination of pancreatic cancer resectability. The optimal place of EUS within the diagnostic algorithm remains dependent on local referral modalities and availability.
    Acta medica Croatica: c̆asopis Hravatske akademije medicinskih znanosti 12/2009; 63 Suppl 3:39-42.
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    ABSTRACT: Endoscopy is an established method for diagnosing gastrointestinal tract diseases, however, suspected subepithelial lesions usually cannot be appropriately evaluated by this technique alone. The prevalence of suspected submucosal gastric lesions at routine endoscopy has been estimated to 0.5%-1%. In this review, we evaluated the role of endoscopic ultrasonography (EUS) in the diagnosis of and management strategy for submucosal lesions. EUS has emerged as the most reliable investigative procedure of choice for evaluating submucosal tumors. EUS is the method of choice to differentiate between true intramural tumors and lesions caused by extraluminal compressions due to normal or pathologic structures. It can determine the originating layer(s) of intramural lesions; can differentiate echogenicity (anechoic, hypoechoic, hyperechoic, isoechoic), vascularity, size, shape, and border characteristics. Some endoscopic findings (color, consistency, mobility, 'pillow sign') can be helpful in narrowing the differential diagnosis. On the other hand, determination of the histologic layer and the internal echo patterns of some submucosal tumors are also predictive of benign or malignant tumors. EUS can provide an accurate diagnosis in 80% of patients with benign lesions and 64% of those with malignant lesions. Hypoechoic lesions in the 3rd and 4th layer are most prone to misclassification. If these cannot be differentiated exactly, EUS can serve as a guide on fine needle aspiration (FNA) biopsy or histologic core biopsies, providing samples for cytologic or histologic analysis. After that, the endoscopist can decide whether the lesion should be periodically followed up, or removed by endoscopy, endoscopic submucosal resection (EMR) or surgery.
    Acta medica Croatica: c̆asopis Hravatske akademije medicinskih znanosti 12/2009; 63 Suppl 3:29-37.