Reasons why it is time to change imaging guidelines on endometriosis

In light of the rising number of patients referred for magnetic resonance imaging (MRI) due to suspected endometriosis and the high expectations of these patients, there is a need for new imaging guidelines to optimally protocol and indicate MRI and transvaginal ultrasonography (TVUS) examinations. This is crucial for accurately addressing the inquiries of gynecologists, encompassing complete mapping and preoperative staging, and facilitating effective communication with patients. In this context, the development of a standardized lexicon, as well as dedicated imaging classifications, is recommended to aid in the comprehensive management of patients. Clinical relevance statement The radiologist should use a standardized lexicon and provide a score along with details about the specific compartments affected by endometriosis disease. This helps in offering clearer guidance to the surgeon. Key Points • An optimal staging is based on the combination of clinical examination, transvaginal US, and MRI. • MRI is able to detect location that is hidden at the beginning of a laparoscopic surgery and thus the need for dedicated MR classifications to correctly stage the disease. • Deep pelvic endometriosis index (dPEI) classification is externally validated and highly correlated with operating time, hospital stay, and postoperative complications. Abbreviations - DPE: - Deep pelvic endometriosis - dPEI: - Deep Pelvic Endometriosis Index - ESUR: - European Society of UroRadiology - MRI: - Magnetic resonance imaging - PE: - Physical examination - SAR: - Society of Abdominal Radiology - SIFEM: - Société d’Imagerie de la Femme - TVUS: - Transvaginal ultrasonography - USL: - Uterosacral ligament

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