Absolute Change in Longest Perpendicular from Nadir Product of Perpendicular Diameters Timepoint

**Semantic type:** Quantitative Concept

**Definition:** The absolute change in the longest perpendicular of the lesion from the timepoint at which the product of perpendicular diameters of the lesion is the smallest.

**Synonyms:** - ACPPDNLP - Absolute Change From PPD Nadir in LPERP - Absolute Change From PPD Nadir in LPERP