Publications by authors named "Omar Abu-Zaydeh"

Introduction And Importance: Chronic Pancreatitis is an irreversible inflammation of the pancreas that can lead to fibrosis and scar formation. Pseudocysts are a late complication of chronic pancreatitis and abdominal pain is the most common presenting complaint.

Case Presentation: A 48-year-old male who is a known case of chronic pancreatitis presented to our department complaining of abdominal pain for a duration of three weeks.

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(1) Background: Over the past several years, there has been a renewed interest with regard to the effect of pre-operative vitamin D levels on post-surgical outcomes. Pre-operative vitamin D deficiency has been associated with many negative post-operative outcomes. However, the role of vitamin D in postoperative outcomes in colorectal liver metastasis (CRLM) resection is relatively uninvestigated.

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Article Synopsis
  • There is a lack of consensus in literature about the impact of primary tumor location on survival rates for patients with colorectal liver metastases (CRLM), especially as most studies are based in Western populations.
  • A study conducted on 501 patients in Israel categorized tumors as right-sided or left-sided, finding that right-sided patients were older but left-sided patients had slightly better survival rates, though these differences weren't statistically significant.
  • Ultimately, the research suggests that in the Mediterranean population, the location of the primary tumor does not significantly influence survival after liver resection for CRLM.
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  • Hand-assisted laparoscopic surgery (HALS) is considered a safe option for removing metastatic liver disease, particularly in older patients over 75, but data on its effectiveness in this age group is limited.
  • A study compared outcomes of patients over 75 (group 1) with those under 75 (group 2), noting differences in tumor location, surgical approach, and completion rates of pre-surgery therapy.
  • Findings showed that while HALS was effective for elderly patients, they experienced a slightly higher complication rate and lower 5-year survival rate compared to younger patients, indicating that it remains a viable option for treating colorectal liver metastasis in older adults.
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Introduction And Importance: An arteriovenous malformation (AVM) in the inferior mesenteric artery is a rare vascular pathology that accounts for 6 % of the causes of gastrointestinal bleeding. AVMs are typically classified as congenital persisting embryonic vasculature that link both systems and do not develop into arteries or veins [3], but they may also develop later in life. The majority of documented cases are iatrogenic after colon surgery.

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Enteric duplication cysts (EDCs) are a benign and uncommon congenital malformation, with a nonspecific and extremely variable clinical presentation. EDCs associated with the pancreas are called pancreatic duplication cysts (PDCs). They are especially rare and can present with recurrent abdominal pain or even severe pancreatitis.

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Renal leiomyosarcoma is a rare, aggressive tumor of the smooth muscles of the kidney. In our case, the tumor has special characteristics that made it highly challenging, as it involved major vessels and other adjacent vital structures. The rarity of the tumor type itself and the special challenging features we faced intraoperatively encouraged us to report the case including the management plan for R0 resection.

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Article Synopsis
  • Hand-assisted laparoscopic surgery for liver resection is a common procedure, and this study focuses on the risk of postoperative incisional hernia (IH) in patients undergoing this surgery for colorectal liver metastasis.
  • A retrospective analysis of 89 patients showed an 18% complication rate, with 7.8% developing IH at the hand port site, particularly in those who were overweight (BMI ≥ 25) and in patients undergoing simultaneous liver and colon resection.
  • Factors identified as independent risks for incisional hernia include the simultaneous resection of liver and colon and a platelet-to-lymphocyte ratio of ≤ 200.
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  • Laparoscopic liver resections (LLR) for colorectal metastasis in the difficult posterosuperior segments are challenging, prompting a study to assess the safety and effectiveness of hand-assisted laparoscopic surgery (HALS) compared to open liver resection (OLR).
  • A total of 187 patients were analyzed, with 78 undergoing HALS and 109 OLR, showing no significant preoperative differences between the groups.
  • HALS led to a shorter hospital stay and lower complication rates compared to OLR, while survival rates and recurrence of liver metastases were similar for both surgical approaches.
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  • The study compares the short-term and long-term outcomes of laparoscopic versus open colorectal resection in patients with metastatic colorectal cancer and liver metastases.
  • A total of 63 patients were analyzed, showing that laparoscopic surgery had longer operative times but shorter hospital stays compared to open surgery.
  • The findings suggest that laparoscopic methods are safer and yield better short-term outcomes without compromising survival rates.
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  • The study examines the outcomes of hand-assisted laparoscopic surgery (HALS) for colorectal liver metastasis (CRLM) in 145 patients across two medical centers.
  • Among the results, 91% of patients achieved complete tumor removal (R0 resections), with a median overall survival of 59 months.
  • HALS demonstrated a low mortality rate (0.7%), manageable complication rates, and effective treatment for select patients with CRLM.
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