Unexplained Bleeding: Acquired Hemophilia Presenting as Spontaneous Retroperitoneal Hemorrhage

To increase clinician awareness of acquired hemophilia A as a rare but life-threatening cause of spontaneous bleeding, particularly in older adults, by highlighting key clinical clues, laboratory evaluation, and evidence-based management strategies. AHA is a particularly important consideration for clinicians working with older adults in the post-acute and long-term care settings in order to prompt management to improve patient outcomes.