Colorectal cancer (CRC) is one of the most common clinical malignancies, its morbidity and mortality are still on the rise. Colorectal tumorous polyp is the main precancerous lesion of CRC. The morbidity and mortality of colorectal neoplasms in men are higher than those in women, and exogenous estrogen supplementation can reduce the incidence of CRC in women, which suggests that estrogen may play a protective role in the occurrence and development of colorectal neoplasms. This article reviewed the research progress on the relationship between estrogen and colorectal neoplasms.

Congenital extrahepatic portosystemic shunt (CEPS) is also called Abernethy malformation, with the manifestation of congenital abnormal anastomosis between the portal vein and the inferior vena cava. CEPS is extremely rare in clinical practice and has diverse clinical symptoms, which often leads to missed diagnosis and misdiagnosis. This article reviews the pathogenesis, classification, clinical manifestation, diagnosis, and treatment of CEPS, so as to improve the awareness of this disease and provide a reference for further standardization of its diagnosis and treatment process in the future.