Vasohibin-1 (VASH1) is an endogenous angiogenesis inhibitor. However, the clinical relevance of VASH1 in colon cancer and its regulations on cancer angiogenesis and cancer cell biological characteristics are still unknown. Here we showed that stromal VASH1 levels were negatively correlated with tumor size, advanced clinical stage and distant metastases in colon cancer patients. Overexpression of VASH1 in colon cancer cells induced apoptosis and senescence, inhibiting cancer cell growth and colony formation in vitro and tumor growth in vivo. In addition, knockdown of VASH1 in cancer cells promoted cell growth, adhesion and migration in vitro, and enhanced tumorigenesis and metastasis in vivo.

Gastrointestinal stromal tumors (GISTs) are the dominant mesenchymal tumors of the digestive tract. Extragastrointestinal stromal tumors (EGISTs) usually originate outside the gastrointestinal tract without connection to the gastric or intestinal wall. However, EGISTs arising from the vaginal wall are very rare. Here, we report a case of EGIST that occurred in the vagina of a 60-year-old woman. The tumor was present in the posterior vaginal wall. It was surgically excised, and histological examination revealed spindle cell morphology with up to 14 mitoses per 50 high power field (HPF) and necrosis with the tumor-negative margins. Immunohistochemical analyses showed strongly positive CD34, CD117, and DOG-1 expression, but negative SMA, S-100, CD10, desmin, and actin expression. The patient underwent surgery and is currently being followed up. A literature review of EGSTs and treatments is also discussed in this report.