Abdel-Rauf Zeina MD, Helit Nakar MD, Nadir Reindorp MD, Alicia Nachtigal MD, Michael M Krausz MD, Itamar Ashkenazi MD and Mika Shapira-Rootman MD PhD
Background: Four-dimensional parathyroid computed tomography (4DCT) is a relatively new parathyroid imaging technique that provides functional and highly detailed anatomic information about parathyroid tumors.
Objective: To assess the accuracy of 4DCT for the preoperative localization of parathyroid adenomas (PTAs) in patients with biochemically confirmed primary hyperparathyroidism (PHPT) and a history of failed surgery or unsuccessful localization using 99mTc-sestamibi scanning and ultrasonography.
Methods: Between January 2013 and January 2015, 55 patients with PHPT underwent 4DCT at Hillel Yaffe Medical Center, Hadera, Israel. An initial unenhanced scan was followed by an IV contrast injection of nonionic contrast material (120 ml of at 4 ml/s). Scanning was repeated 25, 60, and 90 seconds after the initiation of IV contrast administration. An experienced radiologist blinded to the earlier imaging results reviewed the 4DCT for the presence and location (quadrant) of the suspected PTAs. At the time of the study, 28 patients had undergone surgical exploration following 4DCT and we compared their scans with the surgical findings.
Results: 4DCT accurately localized 96% (27/28) of abnormal glands, all of which were hypervascular and showed characteristic rapid enhancement on 4DCT that could be distinguished from Level II lymph nodes. Surgery found hypovascular cystic PTA in one patient who produced a negative 4DCT scan. All patients had solitary PTAs. The scan at 90 seconds provided no additional information and was abandoned during the study.
Conclusions: 4DCT accurately localized hypervascular parathyroid lesions and distinguished them from other tissues. A three-phase scanning protocol may suffice.
Avraham Shotan MD, Barak Zafrir MD, Tuvia Ben Gal MD, Alicia Vazan MD, Israel Gotsman MD and Offer Amir MD
Background: The treatment of patients hospitalized with heart failure (HHF) and ambulatory chronic heart failure (CHF) differs in various countries.
Objective: To evaluate the management and outcomes of patients with HFF and CHF in Israel compared to those in other European countries who were included in the ESC-HF Long-Term Registry.
Methods: From May 2011 to April 2013, heart failure patients – 467 Israelis and 11,973 from other countries – were evaluated. The Israeli patients included 178 with HHF and 289 with CHF. One year outcomes, including all-cause and cardiovascular mortality as well as HHF, were evaluated.
Results: The HHF Israeli patients were older than their CHF Israeli counterparts, had more co-morbidities, included more women, and were treated less frequently with medications suggested by European guidelines. The Israeli HHF patients had similar all-cause 1 year mortality rates compared to HHF patients from other participating countries, but their cardiovascular (CV) mortality was lower, while a significantly higher rate of all-cause and HHF was noted. The Israeli CHF patients were older, suffered from more co-morbidities and had prior cardio-electronic implantable devices. In addition, they had higher mortality rates, especially non-CV, and were more frequently hospitalized, compared to CHF patients from other countries.
Conclusions: The Israeli patients with heart failure differed in their baseline characteristics and the therapeutic approach. Despite high usage of treatments recommended by official guidelines, especially among CHF patients, mortality, particularly in HHF patients, remained high.
Eyal Lotan MD MSc, Stephen P. Raskin MD, Michal M. Amitai MD, Yeruham Kleinbaum MD, Ella Veitsman MD, Peretz Weiss MD, Oranit Cohen-Ezra MD, Tania Berdichevski MD and Ziv Ben-Ari MD
Background: Accurate assessment of liver fibrosis is crucial for the management of patients with hepatitis C virus (HCV) infection.
Objectives: To evaluate the performance of liver segment-to-spleen volume ratio in predicting the severity of liver fibrosis.
Methods: Sixty-four consecutive HCV patients were enrolled in this retrospective study. All patients underwent contrast-enhanced computed tomography (CT) and were divided into three groups based on their hepatic fibrosis stage evaluated by shear-wave elastography (SWE): non-advanced (F0–F1, n=29), advanced (F2, n=19) and severe fibrosis (F3–F4, n=16). Using semi-automated liver segmentation software, we calculated the following liver segments and spleen volumes for each participant: total liver volume (TLV), caudate lobe (CV), left lateral segment (LLV), left medial segment (LMV), right lobe (RV) and spleen (SV), a well as their ratios: CV/SV, RV/SV, LLV/SV, LMV/SV and TLV/SV.
Results: RV/SV was found to discriminate between patients with non-advanced and advanced fibrosis (P = 0.001), whereas SV, CV, RV, TLV/SV, LMV/SV and RV/SV discriminated between patients with advanced and severe fibrosis (P < 0.05). RV/SV ≤ 3.6 and RV ≤ 2.9 were identified as the best cutoff values to differentiate non-advanced from advanced fibrosis and advanced from severe fibrosis with sensitivities of 72.2% and 92.7%, specificities of 72.7% and 77.8%, and with an area under the receiver operating characteristic (ROC) curve of 0.797 and 0.847, respectively (P ≤ 0.002).
Conclusions: RV/SV may be used for the assessment and monitoring of liver fibrosis in HCV patients prior to the administration of antiviral therapy, considering SWE as the reference method.
Noam Oz MD, Danny Alon MD, Gideon Y Stein MD PhD and Dan Turner MD
Background: Pre-exposure prophylaxis (PrEP) for populations at high risk for human immunodeficiency virus (HIV) is still not available in Israel.
Objectives: To analyze post-exposure prophylaxis (PEP) treatment adherence rates among adult men in Tel Aviv, Israel, who have sex with men (MSM), and to obtain data on the demographics of PEP users, exposure types, timeline of exposure and PEP administration, incidence of side effects, number of treatments per individual, and satisfaction with selected elements of treatment provision.
Methods: The authors conducted an observational cohort study of adult MSM who requested PEP treatment in the Tel Aviv Sourasky Medical Center. Information from patients receiving treatment between January 2013 and June 2014 was obtained through telephone interviews by means of a 30-item questionnaire.
Results: Of 336 individuals requesting PEP treatment, 255 (75.9%) were adult MSM, and 100 (39.2%) satisfactorily completed the interview. The average age of the study cohort was 32.4 years (standard deviation of 7.5). Ninety-one (91%) reported completing a full 28-day course of treatment, 84% reported side effects, and 20% underwent multiple courses. Satisfaction was high for interactions with the HIV specialists. Patient experience with PEP treatment in the emergency room setting, and follow-up were inadequate deficient.
Conclusions: PEP adherence rates in Tel Aviv were significantly higher than previously reported. PEP should be administered in designated community settings. PrEP as a general treatment policy might suit the MSM population in Tel Aviv.