Friday, December 4, 2009

Lunar

A 12 year old girl is brought in by her mother because she has been complaining about cyclic pelvic pain which occurs with every full moon. "She's been reading too much Twilight," the mother says. The girl denies any kind of abuse. She has not started menstruating yet. Abdominal exam shows mild suprapubic tenderness. External vaginal exam shows a vascular, bluish bulge protruding from the vaginal introitus while the patient is supine. Pelvic ultrasound is shown above; the white arrow indicates the vagina and the black arrow indicates the uterus.

Challenge: What's the diagnosis?

Image shown under Fair Use.

3 comments:

Suheil said...

Cryptomenorrhea due to imperforate hymen??

Anonymous said...

imperforate hymen?

Craig Chen said...

perfect!
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Lunar

This is imperforate hymen which can be a cause of primary amenorrhea and cyclic pelvic pain with hematocolpos. The ultrasound simply shows dilation of the vagina and uterus due to blood.

Source: UpToDate, image initially from Stone and Alexander, "Images in Clinical Medicine" NEJM.