Mattar Mattar

Dr. Mattar Mattar


Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Verified
Journal Article
Open access
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EKEsther Kazlow
Esther Kazlow
ERElias Rinawi
Elias Rinawi
EGEden Gerszman
Eden Gerszman
MMMattar Mattar
Mattar Mattar
NENabih Essami
Nabih Essami
Ahmad MahamidAhmad Mahamid
Ahmad Mahamid
Background: Pancreatic cancer has a high mortality rate worldwide. Most patients progress to advanced stages, often with metastasis, resulting in a low survival rate. Despite advancements in surgical and oncological treatments, early diagnosis and better risk stratification remain critical. Methods: This retrospective cross-sectional study focused on analyzing data from patients undergoing pancreaticoduodenectomy for pancreatic adenocarcinoma, in order to determine whether the neutrophil-to-lymphocyte ratio (NLR) and other immune–inflammatory markers, such as the systemic immune–inflammation index (SII) and prognostic nutritional index (PNI), can predict postoperative complications and survival outcomes. Results: Analysis of 136 patients revealed that a higher NLR (≥2.5) was significantly associated with longer overall survival (39 months, IQR: 17–100 months; p = 0.004), compared to lower NLR (<2.5; 18 months, IQR: 9–39 months). Higher SII (≥600) was also associated with significantly improved survival (34 months, IQR: 17–114 months; p = 0.001) compared to lower SII (<600; 20 months, IQR: 9–45 months). No significant differences were observed in postoperative complications or other clinical outcomes between NLR groups, although a trend toward more complications in the higher NLR group was noted (p = 0.06). PNI showed no significant impact on survival (PNI < 38.8: 22 months, IQR: 14–60 months; PNI ≥ 38.8: 33 months, IQR: 14–115 months; p = 0.1) or complications (p = 0.8). Conclusions: Our study highlights the prognostic utility of NLR and SII in patients with adenocarcinoma of the head of the pancreas undergoing pancreaticoduodenectomy. Regarding complications, there were no significant differences across groups stratified by NLR, SII, or PNI, suggesting that while NLR and SII are valuable for predicting long-term oncological outcomes in patients undergoing pancreaticoduodenectomy for adenocarcinoma of the head of the pancreas, they may not be reliable indicators of immediate postoperative morbidity.

Verified
Journal Article
Open access
PDF file
Ahmad MahamidAhmad Mahamid
Ahmad Mahamid
OAOmar Abu-Zaydeh
Omar Abu-Zaydeh
MMMattar Mattar
Mattar Mattar
EKEsther Kazlow
Esther Kazlow
DFDvir Froylich
Dvir Froylich
RHRiad Haddad
Riad Haddad
(1) Background: Hand-assisted laparoscopic surgery (HALS) has engendered growing attention as a safe procedure for the resection of metastatic liver disease. However, there is little data available regarding the outcomes of HALS for colorectal liver metastasis (CRLM) in patients over the age of 75. (2) Methods: We compare the short- and long-term outcomes of patients >75-years-old (defined in our study as “elderly patients” and referred to as group 1, G1), with patients <75-years-old (defined in our study as “younger patients” and referred to as group 2, G2). (3) Results: Of 145 patients, 28 were in G1 and 117 were in G2. The most common site of the primary tumor was the right colon in G1, and the left colon in G2 (p = 0.05). More patients in G1 underwent laparoscopic anterior segment resection compared with G2 (43% vs. 39% respectively) (p = 0.003). 53% of patients in G1 and 74% of patients in G2 completed neoadjuvant therapy (p = 0.04). The median size of the largest metastasis was 32 (IQR 19–52) mm in G1 and 20 (IQR 13–35) mm in G2 (p = 0.001). The rate of complications (Dindo-Clavien grade ≥ III) was slightly higher in G1 (p = 0.06). The overall 5-year survival was 30% in G1 and 52% in G2 (p = 0.12). (4) Conclusions: Hand-assisted laparoscopic surgery for colorectal liver metastasis is safe and effective in an elderly patient population.