Bluish-Green Coloration of the Nipples: A Diagnostic Clue for Retroareolar Cysts.

Background/Objectives: Bluish-green discoloration of the nipples in pubertal girls often poses a diagnostic dilemma. Methods: We describe the case of an 11-year-old girl who developed bilateral and symmetrical bluish-green macules in the retroareolar area over eight months. Dermoscopic and ultrasound examinations revealed benign retroareolar cysts, with no signs of malignancy or other alarming features. Differential diagnoses such as vascular malformations, hemangiomas, hematomas, and blue nevi were carefully considered and excluded based on clinical and imaging findings. Results: A diagnosis of bilateral retroareolar cysts was established. The patient underwent conservative management, and ultrasound follow-ups over one year showed no changes. Conclusions: This case underscores the importance of thorough evaluation to avoid unnecessary invasive procedures and to protect the delicate development of the pubertal breast.