Here are some articles on uterine carcinosarcoma:

NCCN Guidelines: Uterine Neoplasms, 2017

Uterine Carcinosarcoma, Review of the literature, 2015 – the latest comprehensive review

Arend, Endometrial cancer: Molecular markers and management of advanced stage disease – the article doe not discuss carcinosarcoma, but it addresses the subject of molecular markers.