Abstract
A case is presented of a 26-year-old woman who was referred to the hematology clinic because of her report of a family history of plasminogen activator inhibitor-1 (PAI-1) deficiency. Since menarche, she had suffered from severe menorrhagia, but she had assumed that this was unrelated to her mother's history of repeated life-threatening bleeding. Her menorraghia was evident by using greater than 100 pads per period, bleeding as long as 4 continuous months, and even bleeding through her clothes despite using both tampons and pads. Evaluation with pelvic examination, endometrial biopsy, and pelvic ultrasound was unremarkable. Medroxyprogesterone acetate treatment for her dysfunctional uterine bleeding was unsuccessful. Laboratory evaluation revealed iron deficiency anemia but otherwise normal platelets, bleeding time, prothrombin time, activated partial thromboplastin time, and vonWillebrand's studies. Despite any preconceptions, examination for a fibrinolytic defect ultimately demonstrated a PAI-1 antigen level of 11.4 ng/mL (4.0-43 ng/mL) and PAI-1 activity less than 5 AU/mL (5-37 AU/mL) and clinically supported a diagnosis of a hereditary, qualitative PAI-1 defect. She was treated with aminocaproic acid with return to relative...Continue Reading
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