An arteriovenous malformation may occur in the uterus and be associated with excessive vaginal bleeding.


Clinical features:

(1) excessive vaginal bleeding

(2) abrupt onset bleeding which may stop abruptly

(3) may first manifest at puberty (associated with the change in hormones)

(4) often refractory to standard therapies


Imaging studies or hysteroscopy show a tangle mat of distended blood vessels in or adjacent to the endometrium.



(1) congenital

(2) iatrogenic (following cesarean section, endometrial curettage, abortion, etc)

(3) tumor related (gestational trophoblastic tumor, endometrial carcinoma)

(4) pregnancy


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