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Topic Review
HER2 in Metastatic Colorectal Cancer
HER2 is an emerging biomarker in colorectal cancer (CRC). This oncogene plays an essential role in regulating cell proliferation, differentiation, migration, and, more in general, tumorigenesis and tumor progression. The most frequent types of HER2 alterations in CRC include gene amplification and missense mutations in 7–8% of CRC, often being mirrored by HER2 protein overexpression, representing founder events in solid tumors, including CRC.
  • 325
  • 09 Feb 2023
Topic Review
PD-L1 Expression as a Biomarker in Gastric Cancer
Despite advances in diagnostic imaging, surgical techniques, and systemic therapy, gastric cancer (GC) is the third leading cause of cancer-related death worldwide. Unfortunately, molecular heterogeneity and, consequently, acquired resistance in GC are the major causes of failure in the development of biomarker-guided targeted therapies. However, by showing promising survival benefits in some studies, the recent emergence of immunotherapy in GC has had a significant impact on treatment-selectable procedures. Immune checkpoint inhibitors (ICIs), widely indicated in the treatment of several malignancies, target inhibitory receptors on T lymphocytes, including the programmed cell death protein (PD-1)/programmed death-ligand 1 (PD-L1) axis and cytotoxic T-lymphocyte-associated protein 4 (CTLA4), and release effector T-cells from negative feedback signals. 
  • 324
  • 26 Sep 2023
Topic Review
An Introduction to Liver Cancers
The liver is the largest and most functionally diverse organ in the human body, and is known to be a critical hub for multiple physiological processes. It is highly vascularized in its nature, making it the most common site for cancer development, especially metastatic cancers. 
  • 319
  • 06 Jan 2023
Topic Review
Exercise Is Medicine for Nonalcoholic Fatty Liver Disease
Upwards of 30% of the world’s population has nonalcoholic fatty liver disease (NAFLD). There is no regulatory-agency-approved effective drug therapy or cure, and lifestyle modification with dietary change and increased physical activity remains crucial in the clinical management of all types of NAFLD, leads to many benefits within and outside the liver in patients with NAFLD. These benefits include an improvement in liver fat, histologic NASH activity, change in body composition, gain in physical fitness, reduction in markers of cardiovascular risk, improvement in health-related quality of life and possibly a reduction in oncologic risk. 
  • 319
  • 06 Jun 2023
Topic Review
Morphological Variations of the Liver
Radiologists and oncogynecologists should be familiar with different liver shape variations to avoid diagnostic errors and unwanted intraoperative surgical complications. Surgeons should be aware of variations in liver shape as in such cases, the vasculature or gallbladder may have a variant anatomical location.
  • 319
  • 16 Jan 2024
Topic Review
Pancreatic and Biliary Neoplasms
Pancreatic cancer and cholangiocarcinoma are aggressive diseases mostly diagnosed at an advanced and inoperable stage. 
  • 317
  • 27 Jan 2022
Topic Review
Fibroblast Growth Factors for Nonalcoholic Fatty Liver Disease
Nonalcoholic fatty liver disease (NAFLD), a chronic condition associated with metabolic dysfunction and obesity, has reached epidemic proportions worldwide. Although early NAFLD can be treated with lifestyle changes, the treatment of advanced liver pathology, such as nonalcoholic steatohepatitis (NASH), remains a challenge. There are currently no FDA-approved drugs for NAFLD. Fibroblast growth factors (FGFs) play essential roles in lipid and carbohydrate metabolism and have recently emerged as promising therapeutic agents for metabolic diseases. Among them, endocrine members (FGF19 and FGF21) and classical members (FGF1 and FGF4) are key regulators of energy metabolism. FGF-based therapies have shown therapeutic benefits in patients with NAFLD, and substantial progress has recently been made in clinical trials. These FGF analogs are effective in alleviating steatosis, liver inflammation, and fibrosis.
  • 318
  • 24 Apr 2023
Topic Review
MRE Parameters That Correlate with Disease Activity
Crohn’s disease (CD) is a chronic immune mediated disorder that most commonly affects the small bowel and/or the large bowel. Treatment targets in CD include mucosal healing assessed via ileocolonoscopy and transmural healing assessed through cross-sectional imaging modalities such as magnetic resonance enterography (MRE).
  • 316
  • 20 Mar 2023
Topic Review
Definition and Diagnosis of Barrett’s Esophagus
Esophageal adenocarcinoma (EAC) is rapidly increasing in incidence and is associated with a poor prognosis. Barrett’s esophagus (BE) is a known precursor of esophageal adenocarcinoma. 
  • 314
  • 14 Apr 2023
Topic Review
Osteoporosis after Sleeve Gastrectomy and Roux-En-Y-gastric Bypass
Obesity has become a worldwide epidemic accompanied by adverse health effects. The limited efficiency of traditional weight reduction regimens has led to a substantial increase in the use of bariatric surgery. Sleeve gastrectomy (SG) and Roux-en-Y-gastric bypass (RYGB) are the most used procedures. Preoperatively, the dietary habits of obese individuals might lead to deficiencies in vitamin D and other nutrients affecting bone mineral metabolism. Bariatric surgery with SG or RYGB can aggravate these deficiencies. The various surgical procedures appear to affect nutrient absorption differently. Being purely restrictive, SG may particularly affect the absorption of vitamin B12 and also vitamin D. In contrast, RYGB has a more profound impact on the absorption of fat-soluble vitamins and other nutrients, although both surgical methods induce only a mild protein deficiency. Despite adequate supplementation of calcium and vitamin D, osteoporosis may still occur after the surgery. This might be due to deficiencies in other micronutrients, e.g., vitamin K and zinc. Regular follow-ups with individual assessments and nutritional advice are indispensable to prevent osteoporosis and other adverse postoperative issues.
  • 314
  • 21 Mar 2023
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