There is nothing more obscure than the obvious fact: a case report of breast cancer associated with Peitz–Jeghers syndrome

This article provides a review of studies analyzing the etiology, diagnosis, and treatment of Peitz–Jeghers syndrome, as well as the risk of cancer of different locations in patients with this genetic disorder. We report a case of Peitz–Jeghers syndrome associated with breast cancer in young women in two generations (mother and daughter). Despite specific clinical manifestations (multiple hamartomatous polyps developing in childhood and ink-black mucous pigmentation in the woman and her immediate relatives), Peitz–Jeghers syndrome was diagnosed only after breast cancer development and consultation with oncologists. This confirms the need for informing both oncologists and general practitioners about this genetic disorder.