An Uncommon Presentation of a Common Disease: A Review of Gastric Metastasis From Breast Carcinoma.

Breast cancer is the most common cancer in women, and the leading cause of cancer-related deaths worldwide. Despite advances in screening and treatment modalities, distant metastasis still develops. Breast cancer metastasis to the gastrointestinal tract is very rare, therefore, its diagnosis, therapeutic strategies, and prognosis pose a clinical problem for clinicians. We summarize the current knowledge regarding the clinicopathological characteristics and diagnostic strategies for metastatic tumors in the stomach of breast origin.

Entamoeba Histolytica: Updates in Clinical Manifestation, Pathogenesis, and Vaccine Development.

Entamoeba histolytica is the responsible parasite of amoebiasis and remains one of the top three parasitic causes of mortality worldwide. With increased travel and emigration to developed countries, infection is becoming more common in nonendemic areas. Although the majority of individuals infected with E. histolytica remain asymptomatic, some present with amoebic colitis and disseminated disease. As more is learned about its pathogenesis and the host's immune response, the potential for developing a vaccine holds promise. This narrative review outlines the current knowledge regarding E. histolytica and E. dispar and insight in the development of a vaccine.

Hereditary Colorectal Tumors: A Literature Review on MUTYH-Associated Polyposis.

MAP (MUTYH-associated polyposis) is a syndrome, described in 2002, which is associated with colorectal adenomas, with enhanced colorectal carcinogenesis. This review synthesizes the available literature on MAP and outlines its pathogenesis, association with colorectal tumorigenesis, screening, treatment, and the subtle differences between it and its close cousins-FAP and AFAP. The preponderance of data is collected using MAP guidelines. However, although AFAP and MAP appear similar, potentially important distinctions exist, warranting targeted diagnostic criteria and treatment approaches. We suggest that it may be prudent to screen for MAP earlier than in current clinical practice, as it has been shown that sequence variants are associated with more severe disease, presenting with an earlier onset of colorectal cancer. Finally, we issue a call-to-action for much-needed further data to establish clear clinical and diagnostic criteria.