The case shows multiple fibroadenomas in a single breast. The case is notable because there are multiple lesions in different stages of involution and degrees of calcification. It actually shows the complete spectrum of calcification in a single patient.
The classic "popcorn" classification is actually just one stage of involution whereby lesions begin calcification and progress with time to a densely calcified solid mass of calcium.
Calcification in a fibroadenoma can change with time like all breast calcifications. The lesions are especially prone to calcification in postmenopausal women.