Diagnostic algorithm to evaluate mastalgia Diagnostic algorithm to evaluate mastalgia. Oil of evening primrose or vitamin E is frequently used for mild/moderate pain, but the effects are no better than placebo. hCG = human chorionic gonadotropin; MRI = magnetic resonance imaging. Source: Breast Disease, Williams Gynecology, 3e Citation: Hoffman BL, Schorge JO, Bradshaw KD, Halvorson LM, Schaffer JI, Corton MM. Williams Gynecology, 3e; 2016 Available at: https://obgyn.mhmedical.com/DownloadImage.aspx?image=/data/books/1758/p9780071849081-ch012_f008.png&sec=118169130&BookID=1758&ChapterSecID=118169061&imagename= Accessed: October 29, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved