18F-Fluorocholine Uptake in Unilateral Breast Related to Breastfeeding in Patient With Primary Hyperparathyroidism.

A 46-year-old woman with primary hyperparathyroidism and negative sestamibi parathyroid scan was referred for 18F-fluorocholine (18F-FCH) positron emission tomography (PET/CT) scan to help localize parathyroid adenoma. FCH PET/CT scan identified a hyperfunctioning parathyroid gland in the left neck. In addition, there was unusually intense unilateral FCH uptake in the right breast corresponding to dense soft tissue.