Absolute Change From Longest Perpendicular At Nadir To Longest Perpendicular

**Semantic type:** Quantitative Concept

**Definition:** The absolute change (positive or negative) between the current longest perpendicular diameter of a lesion and its smallest previously recorded (nadir) longest perpendicular diameter.

**Synonyms:** - ACLPNLP - Absolute Change Frm LPERP Nadir to LPERP - Absolute Change Frm LPERP Nadir to LPERP