On mammogram all of the following are the features of a malignant tumor except

Mammographic features suggestive of breast cancer A solid mass with or without stellate features Asymmetric thickening of breast tissues Clustered microcalcification Presence of fine, stippled calcium in and around a suspicious lesion is suggestive of breast cancer and occurs in as many as 50% of nonpalpable cancers These microcalcifications are especially impoant sign of cancer in younger women, in whom it may be the only mammographic abnormality Ref:Sabiston 20th edition Pgno : 828