Pelvic haematocele in ruptured ectopic pregnancy simulating uterine enlargement

Rupture of an ectopic pregnancy may result in the formation of a pelvic haematocele. Four cases are presented in which the haematocele appeared as a solid or complex mass of coarse echoes on ultrasound examination and was indistinguishable from the uterus. Because of this, the sonographic examination suggested enlargement and inhomogeneity of the uterus. Differential diagnosis is discussed.