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Epithelial ovarian carcinoma (EOC) is associated with a poor prognosis because it shows peritoneal dissemination. To improve the prognosis, it is important to control peritoneal dissemination. However, it is still unclear how tumor cells detach from primary lesions and attach to the mesothelium. The establishment of an appropriate animal model is needed to gain an understanding of the mechanism of peritoneal dissemination in vivo. In the current study, we introduce the process from the local injection of EOC cells into the murine ovarian surface to the development of metastasis, including the peritoneum and distant organs. Female nude mice (BALB/c nu/nu) at 8 weeks of age were used. Under a microscopic field of view, EOC cells (1 x 10 cells/µl of medium-extracellular matrix (ECM)-based hydrogel/unilateral ovary/mouse) were injected into murine ovaries through a retroperitoneal approach from the dorsal flank. This proposed method is a less invasive procedure for the mouse and minimizes damage to the ovary. Here, we describe the methodological steps in the development of the original and metastatic tumor formation of EOC.
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http://dx.doi.org/10.3791/54353 | DOI Listing |
Adv Anat Pathol
January 2025
Department of Pathology, University of Michigan-Michigan Medicine, Ann Arbor, MI.
Uterine smooth muscle neoplasms are a biologically and clinically heterogeneous group of tumors. Morphology is the cornerstone of pathologic diagnosis of these tumors, and most are readily classified as benign or malignant on the basis of routine histologic examination. However, rare subsets-including intravenous leiomyomatosis, benign metastasizing leiomyoma, and disseminated peritoneal leiomyomatosis-have a capacity for extrauterine spread despite benign cytomorphology.
View Article and Find Full Text PDFPathol Res Pract
December 2024
Department of Pathology, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.
Background: Patients with high-grade serous carcinoma (HGSC) are commonly diagnosed at late disease stages and after primary tumors have disseminated in the peritoneum. The overexpression of tight junction proteins has been associated with poor prognosis in this setting, potentially reflecting the tumor´s adaptive changes in the disease cascade.
Methods: By performing immunohistochemistry in a large single-center cohort of a total of 705 HGSC, we test the hypothesis that the protein expression of PReferentially expressed Antigen of MElanoma (PRAME) contains prognostic, predictive or clinically translatable information.
Cell Commun Signal
December 2024
Departmentof Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
Background: Peritoneal dissemination of ovarian cancer (OvCa) can be largely attributed to the formation of a metastatic microenvironment driven by tumoral exosomes. Here, we aimed to elucidate the mechanisms through which exosomal annexin A2 (ANXA2) derived from OvCa cells induces an HPMC phenotypic shift in favour of peritoneal metastasis.
Methods: Immunohistochemistry and orthotopic and intraperitoneal OvCa xenograft mouse models were used to clarify the relationship between tumour ANXA2 expression and peritoneal metastasis.
Ann Surg Oncol
December 2024
Surgical Oncology, Rutgers Cancer Institute, New Brunswick, NJ, USA.
Cureus
November 2024
Radiodiagnosis, Amrita Institute of Medical Sciences, Kochi, IND.
This case series explores four distinct instances of encapsulating peritoneal sclerosis (EPS), a rare but serious condition characterized by the encapsulation of abdominal viscera, commonly referred to as abdominal cocoon. EPS is associated with severe complications, including bowel obstruction and sepsis, which can significantly impact patient outcomes. The first case involves a 41-year-old male patient who had undergone a liver transplant and ultimately succumbed to extensively drug-resistant (XDR) sepsis.
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