title: What caused this dark spot on the patient's back?
authors: Olga Saprygina Forman practices with Associates in Dermatology in Orlando, Fla. The author has disclosed no potential conflicts of interest, financial or otherwise.
authors: Olga
authors: O
authors: Saprygina Forman
mesh_terms: D001415:Back; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D017495:Hyperpigmentation / Q000209:etiology*; D008875:Middle Aged; D010523:Peripheral Nervous System Diseases / Q000150:complications* / Q000175:diagnosis; D011537:Pruritus / Q000209:etiology*