Unresolving cyclic pelvic pain in young women due to rare structural uterine anomalies: a case series

Background There are many causes for cyclic pelvic pain unresponsive to anti-spasmodic medications in young women. An uncommon, although significant, association in patients presenting with such symptoms is structural uterine anomalies with rudimentary functional cavities. Ultrasound is the first-line modality for the investigation of dysmenorrhea, and the radiologist may be the first person to identify such an underlying condition in the patient. However, transabdominal ultrasound may provide only limited information. Magnetic resonance imaging (MRI) is the imaging modality of choice in such situations due to its high soft tissue resolution and multiplanar capability. This case series is unique in that it primarily highlights the MR imaging of rare structural uterine anomalies in three young females suffering from severe dysmenorrhea, along with an imaging approach. Case presentation We present three cases of unresolving cyclic pain in young nulliparous females who were radiologically diagnosed with three rare uterine structural anomalies—accessory and cavitated uterine mass, Mayer–Rokitansky–Küster–Hauser syndrome, and functional non-communicating rudimentary horn in a hemiuterus or unicornuate uterus, which were treated with resection leading to symptom relief. Conclusion In young women with recurrent cyclic pelvic pain, uterine structural abnormalities with functioning cavities should be considered as an etiology and evaluated with MRI. Owing to the non-specific nature of causes of dysmenorrhea, a schematic approach to imaging is essential for identifying the various underlying gynecological conditions, thus aiding in the prompt management of the patient.