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עמוד בית
Wed, 16.07.25

Search results


July 2025
Basel Darawsha MD, Rozan Marjiyeh MD, Ayat Agbaria MD, Miriam Obeid MD, Hayim Gilshtein MD

Juvenile polyposis syndrome (JPS) is a rare autosomal dominant disorder characterized by hamartomatous polyps throughout the gastrointestinal tract, with an estimated prevalence of 1 in 100,000 individuals. While most cases follow an autosomal dominant inheritance pattern, some are caused by de novo mutations [1].

The age of onset for JPS is typically during childhood or adolescence, with a mean age at diagnosis of 18.5 years [2]. A major concern in JPS is the increased risk of colorectal cancer (CRC), requiring close lifelong surveillance. The cumulative lifetime risk for CRC ranges from 38% to 68%, with a mean age at diagnosis between 34 and 44 years [3].

Although juvenile polyps were initially considered to have low malignant potential, studies have identified two pathways of carcinogenesis in JPS: progression from hamartomatous polyps to adenoma and then to adenocarcinoma or direct transformation of hamartomatous polyps into adenocarcinoma. The management of JPS is tailored to each patient's specific manifestations and clinical presentation. The primary treatment goal is to prevent morbidity associated with gastrointestinal polyps, such as bleeding and intestinal obstruction.

Yaron Niv MD FACG AGAF, Rawi Hazzan MD

I read with great interest the comprehensive and interesting paper by Hazzan and colleagues in the Israel Medical Association Journal (IMAJ) [1]. The authors examined the difference in the results between morning and afternoon shifts of colonoscopy procedures. Not to my surprise, they found that more polyps were found in the morning shifts than in those in the afternoon. I believe, as do the authors, that the higher quality of the colonoscopy, the better its efficacy in detecting polyps and preventing colorectal cancer (CRC).

May 2025
Rawi Hazzan MD, Tarek Saadi MD, Revital Guterman RN, Ruhama Elhayany MHA, Avraham Yitzhak MD, Naim Abu-Freha MD

Background: Colorectal cancer (CRC) is the third most commonly occurring cancer worldwide. There are conflicting reports on whether colonoscopies performed during the morning shift have higher adenoma detection rates.

Objectives: To investigate the differences in polyp detection rate (PDR) in colonoscopies between morning and afternoon shifts.

Methods: In a retrospective, multicenter study involving a large cohort, we analyzed all colonoscopies conducted between 2016 and 2023 across seven endoscopy departments. The PDR was compared between morning and afternoon shifts.

Results: We included 368,997 colonoscopies: 213,795 (57.9%) performed during the morning shift and 155,202 (42.1%) during the afternoon shift. Patients undergoing colonoscopies during the morning shift were more frequently female (53.8% vs. 51%, P < 0.001) and tended to be older compared to those in the afternoon shift (average age of 56.97 ± 12.6 vs. 55.6 ± 12.9, P < 0.001). Colonoscopies conducted during the morning shift exhibited a higher cecum intubation rate (CIR) (96.7% vs. 95.6%, P < 0.001). During the morning shift, higher rates of PDR (32.9% vs. 29.9%, P < 0.001) were observed. In the multivariate analysis, after adjusting for other variables, age, male sex, polyp follow-up, fecal occult blood test, morning shift, familial history of CRC, and rectal bleeding demonstrated statistically significant associations (P < 0.001) for PDR.

Conclusions: Colonoscopies during the morning shift yielded a higher PDR and CIR than those in the afternoon. To improve this rate, endoscopists working the afternoon shift must be provided with the right conditions.

January 2023
Mohamad Suki MD, Fadi Abu Baker MD, Shaul Pery MD, Moran Levin MD, Smadar Nephrin, Amani Beshara MD, Baruch Ovadia MD, Oren Gal MD, Yael Kopelman MD

Background: Polyp detection rate (PDR) is a convenient quality measure indicator. Many factors influence PDR, including the patient's background, age, referral (ambulatory or hospitalized), and bowel cleansing.

Objectives: To evaluate whether years of professional experience have any effect on PDR.

Methods: A multivariate analysis of a retrospective cohort was performed, where both patient- and examiner-related variables, including the experience of doctors and nurses, were evaluated. PDR, as the dependent variable was calculated separately for all (APDR), proximal (PPDR), and small (SPDR) polyps.

Results: Between 1998 and 2019, 20,996 patients underwent colonoscopy at a single center. After controlling for covariates, the experience of both doctors and nurses was not found to be associated with APDR (odds ratio [OR] 0.99, 95% confidence interval [95%CI] 0.98–1.00, P = 0.15 and OR 1.03, 95%CI 1.02–1.04, P < 0.0001, respectively). However, after 2.4 years of colonoscopy experience for doctors, and 9.5 years of experience for nurses, a significant increase in APDR was observed. Furthermore, results revealed no association for PPDR and SPDR, as well.

Conclusions: Years of colonoscopy experience for both doctors and assisting nurses were not associated with APDR, PPDR, and SPDR. In doctors with 2.4 years of experience and nurses with 9.5 years of experience, a significant increase in APDR was observed.

Alina Weissmann-Brenner MD, Vered Yulzari MD, Eran Kassif MD, Michal Zajicek MD

Background: Advances in examination techniques have improved routine assessment of non-gynecological structures in the pelvis.

Objectives: To describe the sonographic features of incidental urological abnormalities found during gynecological transvaginal ultrasound.

Methods: A retrospective descriptive analysis of patients who underwent gynecological ultrasound and were diagnosed with urologic findings was performed. The sonographic features of the findings including size, echogenicity, and vascularity were examined.

Results: Gynecological ultrasound diagnosed urological findings in nine women. Two had primary neoplasms of the urinary bladder, one had metastases to the urinary bladder, one had polyps in the distal ureters, four presented with calculus in the distal ureters (one of them was 19 weeks pregnant), and one showed diverticulum of the urethra. At presentation five women (56%) had urinary complaints. Two patients (22%) with abdominal pain with distal ureteral calculi had normal transabdominal ultrasound targeted to the urinary system prior to the gynecological sonography.

Conclusions: Transvaginal ultrasound is useful in the diagnosis of urological abnormalities, mainly in the urinary bladder and the distal ureters. We suggest adding transvaginal assessment for female patients with urinary complains in whom transabdominal ultrasound of urinary system was unremarkable.

June 2022
Doron Garfinkel MD, and Yuval Levy MD

Background: There has been a rapid increase in vulnerable subpopulations of very old with co-morbidity, dementia, frailty, and limited life expectancy. Being treated by many specialists has led to an epidemic of inappropriate medication use and polypharmacy (IMUP) with negative medical and economic consequences. For most medications there are no evidence-based studies in older people and treatments are based on guidelines proven in much younger/healthier populations.

Objectives: To evaluate whether the benefits of reducing IMUP by poly-de-prescribing (PDP) outweighs the negative outcomes in older people with polypharmacy.

Methods: The Garfinkel method and algorithm were used in older people with polypharmacy (≥ 6 prescription drugs).

Results: We found that in nursing departments, of 331 drugs de-prescribed only 32 (10%) had to be re-administered. Annual mortality and severe complications requiring referral to acute care facility were significantly reduced in PDP (P < 0.002). In community dwelling older people, successful de-prescribing was achieved in 81% with no increase in adverse events or deaths. Those who de-prescribed ≥ 3 prescription drugs showed significantly more improvement in functional and cognitive status, sleep quality, appetite, serious complications, quality of life, and general satisfaction compared to controls who stopped ≤ 2 medications (P < 0.002). Rates of hospitalization and mortality were comparable. Clinical improvement by polydeprescribing was usually evident within 3 months and persisted for several years. The main barrier to polydeprescribing was physician’s unwillingness to deprescribe (P < 0.0001)

Conclusions: Applying the Garfinkel method of PDP may improve the lives of older people and save money.

July 2021
Sharon Tamir MA, Daniel Kurnik MD, Myriam Weyl Ben-Arush MD, and Sergey Postovsky MD

Background: Decisions on medication treatment in children dying from cancer are often complex and may result in polypharmacy and increased medication burden. There is no information on medication burden in pediatric cancer patients at the end of life (EOL).

Objectives: To characterize medication burden during the last hospitalization in children dying from cancer

Methods: We performed a retrospective cohort study based on medical records of 90 children who died from cancer in hospital between 01 January 2010 and 30 December 2018. Demographic and clinical information were collected for the last hospitalization. We compared medication burden (number of medication orders) at hospitalization and at time of death and examined whether changes in medication burden were associated with clinical and demographic parameters.

Results: Median medication burden was higher in leukemia/lymphoma patients (6 orders) compared to solid (4 orders) or CNS tumor patients (4 orders, P = 0.006). Overall, the median number of prescriptions per patient did not change until death (P = 0.42), while there was a significant reduction for some medication subgroups (chemotherapy [P = 0.035], steroids [P = 0.010]).Patients dying in the ICU (n=15) had a higher medication burden at death (6 orders) than patients dying on wards (3 orders, P = 0.001). There was a trend for a reduction in medication burden in patients with “Do not resuscitate” (DNR) orders (P = 0.055).

Conclusions: Polypharmacy is ubiquitous among pediatric oncology patients at EOL. Disease type and DNR status may affect medication burden and deprescribing during the last hospitalization.

Renana Barak MD, Barliz Waissengrin MD, and Ido Wolf MD
February 2020
Helal Said Ahmad MD, Mahmud Mahamid MD, Qusai Jawabreh RN, Tawfik Khoury MD and Amir Mari MD
January 2020
Ariel Greenberg MD, Revital Kariv MD, Irit Solar PhD and Dov Hershkovitz MD PhD

Background: Evaluation of mismatch repair (MMR) deficiency is conducted via immunohistochemistry or by microsatellite instability (MSI) analysis. Heterogeneous immunohistochemistry staining for MMR proteins may show different patterns; however, according to current guidelines, all of those patterns should be interpreted as MMR proficient. This conclusion might lead to false negative results because although most cases of heterogeneity stem from technical factors and biological variability, other types of heterogeneity represent true MMR deficiency.

Objectives: To identify a unique heterogeneity pattern that is associated with true MMR loss.

Methods: We analyzed 145 cases of colorectal carcinoma. Immunohistochemistry staining for MLH1, PMS2, MSH2, and MSH6 were performed. We defined geographic heterogeneity as areas of tumor nuclear staining adjacent to areas of loss of tumor nuclear staining with intact staining in the surrounding stroma. All cases were evaluated for the presence of geographic heterogeneity. In addition, 24 cases were also evaluated by MSI testing.

Results: Of the 145 cases, 24 (16.5%) were MMR deficient. Of the 24 cases for which MSI analysis was also available, 10 cases (41.7%) demonstrated biological heterogeneity, 5 (20.8%) demonstrated technical heterogeneity, and 2 (8.3%) demonstrated geographic heterogeneity. Only the two cases with geographic heterogeneity were MSI-high via MSI analysis. In addition, a germline mutation in MSH-6 was identified in one of these cases.

Conclusions: Geographic heterogeneity may raise a suspicion for a MMR-deficient case, which should be further analyzed using additional methodologies such as MSI analysis.

Ophir Ilan MD PhD, Yuval Tal MD PhD, Alon Y. Hershko MD PhD, Oded Shamriz MD, Emilie Bohbot MD, Shay Tayeb PhD, Daphna Regev M.Sc, Amos Panet PhD and Ron Eliashar MD

Background: Nasal polyps are three-dimensional structures arising from the mucosa of the upper airway. Due to their complexity, the reliability of single-layer cell cultures and animal systems as research models is limited.

Objectives: To evaluate the feasibility of an ex vivo organ culture of human polyps, preserving tissue structure and function.

Methods: Nasal polyps were excised during routine endoscopic sinus surgery for chronic rhinosinusitis and polyposis. Fresh tissue samples were used for pathological evaluation and for the preparation of 250–500 µm sections, which were incubated in culture media. Tissue viability was assessed by visualisation of cilia motility, measurement of glucose uptake, and an infectivity assay. Cytokine secretion was evaluated by enzyme-linked immunosorbent assay and real-time polymerase chain reaction before and after the introduction of steroids.

Results: Polyp tissue viability was retained for 2–3 days as demonstrated by cilia motility, glucose uptake and preserved cellular composition. Tissue samples maintained their capacity to respond to infection by herpes simplex virus 1 and adenovirus. Introduction of dexamethasone to cultured tissue samples led to suppression of interferon-g production.

Conclusions: The ex vivo nasal polyp organ culture reproduces the physiological, metabolic, and cellular features of nasal polyps. Furthermore, it shows a preserved capacity for viral infection and response to drugs. This system is a useful tool for the investigation nasal-polyps and for the development of novel therapies.

October 2017
Rima Rappaport MD, Zeev Arinzon MD, Jacob Feldman MD, Shiloh Lotan MD, Rachel Heffez-Aizenfeld MD, and Yitshal Berner MD

Background: Medication reconciliation (MR) at hospital admission, transfer, and discharge has been designated as a required hospital practice to reduce adverse drug events.

Objectives: To perform MR among elderly patients admitted to the hospital and to determine factors that influence differences between the various lists of prescribed drugs as well as their actual consumption.

Methods: We studied patients aged 65 years and older who had been admitted to the hospital and were taking at least one prescription drug.

Results: The medication evaluation and recording was performed within 24 hours of admission (94%). The mean number of medications was 7.8 per patients, 86% consumed 5 or more medications. Mismatching between medication prescribed by a primary care physician (PCP) and by real medication use (RMU) was found in 82% of patients. In PCP the most common mismatched medications were cardiovascular drugs (39%) followed by those affecting the alimentary tract, metabolism (24%), and the nervous (12%) system. In RMU, the most commonly mismatched medications were those affecting the alimentary tract and metabolism (36%). Among all causes of mismatched medications, discrepancies in one drug were found in 67%, in two drugs in 21%, and in three drugs in 13%. The mismatching was more common in females (85%) than in males (46%, P = 0.042).

Conclusions: This study provided evidence in a small sample of patients on differences of drug prescription and their use on admission and on discharge from hospital. MR processes have a high potential to identify clinically important discrepancies for all patients.

February 2017
Mahmud Mahamid MD, Tarik Yassin MD, Omar Abu Elheja MD and William Nseir MD

Background: Hyperplastic polyps (HPs) of the colon are the most common colorectal polyps. Metabolic syndrome components such as obesity and hyperlipidemia are considered the most common etiological factors for HPs as well contributing to the pathogenesis of fatty liver disease. Objectives: To determine the possible association between biopsy-proven steatohepatitis and hyperplastic colonic polyps. 

Methods: This retrospective cohort observational study conducted at the Holy Family Hospital in Nazareth, Israel, included subjects who underwent screening colonoscopy over a 2 year period. Data were extracted from the patient charts and included demographics, anthropometric measurements, vital signs, underlying diseases, medical therapy, laboratory data, and results of the liver biopsy. The colonoscopy report and pathological report of each extracted polyp were also evaluated.

Results: A total of 223 patients were included in the study: 123 patients with biopsy-proven non-alcoholic steatohepatitis (NASH) and 100 patients without NASH who served as the control. Fourteen colonic adenomas (11% of patients) were found in the NASH group vs. 16 (16%) in the control group (P = 0.9); 28 HPs were found in the NASH group (22.7%) vs. 8 in the control group (8%) (P < 0.05). The multivariate analysis, after adjusting for, age, C-reactive protein and smoking, showed that the presence of NASH (OR 1.69, 95%CI 1.36–1.98, P < 0.01) was associated with increased risk for HP. 

Conclusions: Our study found an association between biopsy-proven steatohepatitis and the burden of hyperplastic polyp.

 

May 2016
Dan Meir Livovsky MD, Orit Pappo MD, Galina Skarzhinsky PhD, Asaf Peretz MD AGAF, Elliot Turvall MSc and Zvi Ackerman MD

Background: Recently we observed patients with chronic liver disease (CLD) or chronic reflux symptoms (CRS) who developed gastric polyps (GPs) while undergoing surveillance gastroscopies for the detection of either esophageal varices or Barrett's esophagus, respectively.

Objectives: To identify risk factors for GP growth and estimate the gastric polyp growth rate (GPGR).

Methods: GPGR was defined as the number of days since the first gastroscopy (without polyps) in the surveillance program, until the gastroscopy when a GP was discovered.

Results: Gastric polyp growth rates in CLD and CRS patients were similar. However, hyperplastic gastric polyps (HGPs) were detected more often (87.5% vs. 60.5%, P = 0.051) and at a higher number (2.57 ± 1.33 vs. 1.65 ± 0.93, P = 0.021) in the CLD patients. Subgroup analysis revealed the following findings only in CLD patients with HGPs: (i) a positive correlation between the GPGR and the patient's age; the older the patient, the longer the GPGR (r = 0.7, P = 0.004). (ii) A negative correlation between the patient's age and the Ki-67 proliferation index value; the older the patient, the lower the Ki-67 value (r = -0.64, P = 0.02). No correlation was detected between Ki-67 values of HGPs in CLD patients and the presence of portal hypertension, infection with Helicobacter pylori, or proton pump inhibitor use.

Conclusions: In comparison with CRS patients, CLD patients developed HGPs more often and at a greater number. Young CLD patients may have a tendency to develop HGPs at a faster rate than elderly CLD patients.

June 2014
Ephraim Eviatar MD, Koby Pitaro MD, Haim Gavriel MD and Daniel Krakovsky MD

Background: Over the past 20 years, advances in endoscopic sinus surgery (ESS) techniques have led to widespread applications of this technology in both adult and pediatric populations with better results and lower morbidity.

Objectives: To update data regarding the rate of minor and major complications following ESS procedures that used powered instrumentation.

Methods: We retrospectively reviewed the charts of all patients who, with general anesthesia, underwent ESS utilizing powered instrumentation between January 1996 and December 2006. Age, gender, indication for surgery, length of hospitalization, and type and rate of surgical complications were recorded.

Results: A total of 1190 patients were included in our study (1309 surgeries). The male:female ratio was 1.7:1.0 and the average age was 39 years (range 4–86 years). The most common indication for surgery was chronic rhinosinusitis. The rate of major complications was 0.31% and that of minor complications 1.37%. The only major complication that occurred was cerebrospinal fluid leak. The minor complications included epistaxis, periorbital emphysema, ecchymosis and mucocele formation.

Conclusions: Compared to previously published series, the rate of major and minor complications in our study was low. The results indicate that the use of powered instruments during ESS is safe.

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