Mariena Browning, 28, from Pocatello, Idaho, was diagnosed with stage 3 melanoma after finding a lump in her groin at 22 years old—a relatively unusual spot for this dangerous type of skin cancer.

Around one in 10 women will develop ovarian cysts at some point during their lives, and while the prospect of a cyst growing on your ovaries could set off alarm bells, they aren’t something you ...