MKI67 and obesity due to melanocortin 4 receptor deficiency: The main characteristics of BC patients were obesity (41%), ≤4 pregnancies (72%), unilateral tumor localization (95%), ductal tumor type (91%), stage III tumor (35%), positive node status (73%), luminal A (46%), Ki-67 ≥ 20% (36%), metastasis presence (29%), non-chemotherapy response (37%), and benign breast disease-uterine fibroids presence (28%).