Leiomyosarcoma
Leiomyosarcoma of soft tissues of arm. The fusiform shape of the tumor is due to the fact that the tumor is following the course of the large blood vessels from which it arose.

Source: Rosai: Surgical Pathology 9th edition
Leiomyosarcoma of soft tissues of arm. The fusiform shape of the tumor is due to the fact that the tumor is following the course of the large blood vessels from which it arose.

Source: Rosai: Surgical Pathology 9th edition