<prompt> On mammogram all of the following are the features of a malignant tumor exceptSpiculationMicrocalcificationMacrocalcificationIrregular mass  <response>: 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 