Animal Disease L1

Lesion

abnormal change in tissue or organ due to injury or disease

Location (Description)

State specific anatomic tissue, organ, or structure

one lesion =

Single/Solitary

2-4 lesions =

Few/Small #

5+ lesions =

Moderate # or give an approx. range

Too numerous to count lesions

Estimate (hundreds, thousands)

How to measure 2D lesion

L x W

How to measure 3D lesion

Thickness

Focal

limited to 1 area

Widespread

majority is affected, remainder is normal M

Multifocal

multiplie areas overlapping = coalescing

Diffuse

All of tissue affected

Miliary

uniform sized 1-2 mm lesions throughout

Semitransparent

some light or image distorted

Turbid/Cloudy

murky

Opaque

cannot see or pass light

“Regular” size

similar shapes and sizes

“Irregular” size”

Different shapes and sizes

Nodular

solid extending from surface or cut surface

Umbilicated

outer edge is raised but inside is depressed

Cavitated

outer edge is raised but inside is hollow

Cystic

hollow and filled with fluid

Gelatinous

jello

Soft

Solid but squishy

Firm

solid and dense

Hard

difficult to cut

Rough

uneven + coarse

Smooth

consistent feel

Viscous

Sticky

What to include in describing lesions

Location

number

distribution

color

contour

texture/consistency