KCNMA1 and endometrial cancer: In 185 tissue samples of type I endometrial cancer, protein expression of KCNMA1 by immunohistochemistry was compared with 40 normal endometrium tissues and 38 atypical endometrial hyperplasia tissues; a significantly higher expression was found in all layers of type I endometrial cancer, and there was more correlation with higher FIGO (International Federation of Gynecology and Obstetrics) stages and lymph node metastasis samples, suggesting the association of these channels with poor prognosis [14].