In terms of morphology, skin, vascular, coarse or popcorn-like, large rod-like, round, rim, dystrophic, milk of calcium, and suture calcifications are typically benign, whereas amorphous, coarse heterogeneous, fine pleomorphic, and fine linear or fine-linear branching calcifications are suspicious.
In terms of distribution, descriptors are listed in increasing likelihood of malignancy: diffuse, regional, grouped (formerly known as clustered), linear, and segmental.
Stable means not significantly changed. This can refer to size, morphology, and/or distribution.