Preferred Label : indistinct margin;
RADLEX synonyms : ill-defined margin; poorly defined margin; smudgy margin; poorly-defined margin; ill-defined; not circumscribed - indistinct margin;
Definition : PI-RADS: blurred. BI-RADS Mammo: No clear demarcation of the entire margin or any
portion of it from the surrounding tissue (historically, ill defined). US: no clear
demarcation between a mass and the surrounding tissue anywhere on the margin. [TI-RADS]:
Border of the nodule is difficult to distinguish from thyroid parenchyma; the nodule
lacks irregular or lobulated margins.;
Source : BI-RADS 5; PI-RADS, TI-RADS;
Origin ID : RID5709;
Member of
PI-RADS: blurred. BI-RADS Mammo: No clear demarcation of the entire margin or any
portion of it from the surrounding tissue (historically, ill defined). US: no clear
demarcation between a mass and the surrounding tissue anywhere on the margin. [TI-RADS]:
Border of the nodule is difficult to distinguish from thyroid parenchyma; the nodule
lacks irregular or lobulated margins.
