Published online Apr 27, 2018. doi: 10.4254/wjh.v10.i4.402
Peer-review started: January 20, 2018
First decision: February 28, 2018
Revised: March 10, 2018
Accepted: April 2, 2018
Article in press: April 3, 2018
Published online: April 27, 2018
Core tip: Metastatic hepatic leiomyosarcoma is a rare malignant smooth muscle tumor. This case report presents a case of smooth muscle tumor of uncertain malignant potential (STUMP) occurring in a broad ligament that developed into metastatic hepatic leiomyosarcoma over a period of 6 years, and an ultrasound-guided pure laparoscopic partial liver resection with vessel-sealing devices using the crush clamping method and Pringle maneuver was performed safely. This case is an extremely rare case of malignant transformation from primary STUMP to metastatic hepatic leiomyosarcoma. We share this case to provide important evidence regarding the treatment for metastatic hepatic leiomyosarcoma associated with STUMP.