Introduction: The epidermal growth factor receptor, EGFR (HER-1), is a tyrosine kinase receptor. EGFR activation plays an important role in increased cell proliferation, angiogenesis, and decreased apoptosis. Our objective was to study EGFR immuno-expression in GIST, as well as its prognostic value.
Patients And Method: A retrospective study that included all patients operated on with a histologic diagnosis of GIST at Department of Surgery, Hospital General, Ciudad Real, between 1995 and 2007.
Clinical Features: age, sex, manifestations, mortality, recurrence. Pathological features: origin, size, tumoral necrosis, mitotic index, cell type. Immunohistochemical features: vimentin, (V9, Dako A/s); smooth muscle actin (HHF-35, Biogenex); CD34 (QBEND/10); S100 (Policlonal Dako A/S), CD117, (c-kit Rabbit, antihuman polyclonal antibody, 1:600); PDGFR-alfa (Rabbit polyclonal antibody, 1:50, Sta. Cruz Biotechnology). Prognostic molecular features: P-53, PAb240 (DakoCytomation) 1:75; Ki-67, clona MIBI (Dako, Denmark). Malignancy criteria: Fletcher's criteria.
Results: From 1995 to 2007, 35 GISTs were resected in our Department. Mean age: 61.11 +/- 11.02, with a female predominance of 62.9%. Initial clinical manifestation included digestive hemorrhage in 40%. Median follow-up was 28 months (3-133). Mortality was 54.3%, and recurrence rate was 40%. The most frequent origin was the stomach, 51.4%, (18). There was tumor necrosis in 57.1% (20). There were spindle-like cells in 57.1%, and epithelioid cells in 14.3%. Mean size was 9.58 +/- 6.29. Mitotic index per 50 high-power fields was 13.44 +/- 16.08; 51.45% (18) were high-risk tumors. Immunohistochemical expression: CD117+, 85.7%. PDGFRA+, 85.7%. CD34+, 77.1%. EGFR+, 62.9%. S100+, 34.3%. Actin+, 20%. Vimentin+, 100%. p53+, 40%. ki67+, 10.71 +/- 10.82. There was no correlation between EGFR expression and recurrence and/ or mortality, p = 0.156 and p = 0.332, respectively. Mitosis index related to mortality, p = 0.02, and recurrence, p = 0.013.
Conclusion: In our study there was no relation between EGFR immunohistochemical expression and the prognosis of GIST.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.4321/s1130-01082008001200003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of HER2-Low breast carcinoma in metastatic settings: a cytological approach to proliferation and survival.
J Am Soc Cytopathol
January 2025
Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Pathology & Laboratory Medicine, University of Miami Hospital, Miami, Florida.
Introduction: Human epidermal growth factor receptor 2 (HER2)-low breast cancer, defined by HER2 immunohistochemistry scores of 1+ or 2+ without gene amplification, represents a unique subgroup with emerging therapeutic implications. Limited data describe the behavior of HER2-low tumors, particularly in metastatic settings. This study evaluated the frequency of HER2-low expression, Ki-67 proliferation index, and survival outcomes across HER2 subtypes in metastatic breast carcinoma using cytology specimens.
View Article and Find Full Text PDFDiscussion on the mechanism of HER2 resistance in esophagogastric junction and gastric cancer in the era of immunotherapy.
Hum Vaccin Immunother
December 2025
Department of Oncology, Changzhi People's Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China.
Human epidermal growth factor receptor 2 (HER2) is a critical biomarker and therapeutic target in gastric/gastroesophageal junction (G/GEJ) cancers, despite the initial success of HER2-targeted therapies, such as trastuzumab, resistance to these drugs has emerged as a major impediment to effective long-term treatment. This review examines the mechanisms of drug resistance in HER2-positive G/GEJ cancer, the primary mechanisms of resistance explored include alterations in the HER2 receptor itself, such as mutations and changes in expression levels, as well as downstream signaling pathways, and interactions with the tumor microenvironment (TME). Furthermore, the review discusses the Novel therapeutic approaches, including the use of antibody-drug conjugates (ADCs) and combination therapies are assessed for their potential to enhance outcomes.
View Article and Find Full Text PDFThe potential of lazertinib and amivantamab combination therapy as a treatment strategy for uncommon EGFR-mutated NSCLC.
Cell Rep Med
January 2025
Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Republic of Korea; Yonsei New ΙΙ Han Institute for Integrative Lung Cancer Research, Yonsei University of Medicine, Seoul, Republic of Korea. Electronic address:
Uncommon epidermal growth factor receptor (EGFR) mutations in non-small cell lung cancer (NSCLC) pose therapeutic challenge due to limited response to EGFR tyrosine kinase inhibitors (TKIs). This study presents preclinical evidence and mechanistic insights into the combination of lazertinib, a third-generation EGFR-TKI; and amivantamab, an EGFR-MET bispecific antibody, for treating NSCLC with uncommon EGFR mutations. The lazertinib-amivantamab combination demonstrates significant antitumor activity in patient-derived models with uncommon EGFR mutations either before treatment or after progressing on EGFR-TKIs.
View Article and Find Full Text PDFMind relaxation effect of Jatamansi Taila Shirodhara on psychological distress in Triple Negative Breast Cancer (TNBC) patients - results of an open-labelled, randomised controlled clinical trial.
J Ayurveda Integr Med
January 2025
Bharatiya Sanskriti Darshan Trust's Integrated Cancer Treatment and Research Centre, Wagholi, Pune, Maharashtra, India.
Background: Triple-negative breast cancer (TNBC) is a subtype of breast cancer clinically defined as lacking expression of Estrogen receptor (ER), Progesterone receptor (PR), and Human Epidermal growth factor Receptor (HER2). Psychological distress is a major risk factor of TNBC, patients diagnosed with TNBC are under tremendous stress due to the aggressive nature of the disease. Stress hormones decrease the efficacy of therapeutics.
View Article and Find Full Text PDFFirst Report of Causing Southern Blight on in China.
Plant Dis
January 2025
Hainan University School of Tropical Agriculture and Forestry, Haikou, Hainan, China;
Katsumada galangal seed ( K. Schum) is an important member of the Zingiberaceae family, with both medicinal value and culinary applications (Park et al. 2020).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!