[Intravenous leiomyomatosis of the uterus]

Intravenous leiomyomatosis imitates an invasive malignant tumour both clinically and pathologically although it represents a perfectly benign disease with a favourable outcome. The knowledge of this very rare disease is necessary not to omit the indicated operation on the patient, because of an erroneous assumption of incurability. Therefore, we present the clinical and pathological appearance of this disease from two typical cases of our own.