International Classification of Pneumoconioses

Parameter

Finding

Code

small rounded opacities, type

<= 1.5 mm in diameter

p

1.5 – 3.0 mm in diameter

q(m)

3 – 10 mm in diameter

r(n)

small rounded opacities, profusion

absent or rare

0

few

1

numerous

2

very numerous, with normal lung markings partly or totally obscured

3

small irregular opacities, type

fine or linear

s

medium

t

coarse, blotchy

u

small irregular opacities, profusion

absent or rare

0

few

1

numerous

2

very numerous, with normal lung markings partly or totally obscured

3

large opacities, size

1 – 5 cm in diameter, or several each >= 1 cm with sum of diameters <= 5

A

>= 1 opacities larger or more numerous than in A, with combined area less than right upper zone

B

>= 1 opacities with combined area exceeding the equivalent of the right upper zone

C

pleural thickening, chest wall and diaphragm

pl

pleural calcifications

plc

Additional Symbols

Code

coalescence of small rounded pneumconiotic opacities

ax

bullae

bu

cancer of lung or pleura

ca

calcification in small pneumoconiotic opacities

cn

abnormality of cardiac size or shape

co

cor pulmonale

cp

cavity

cv

marked distortion of intrathoracic organs

di

effusion

ef

marked emphysema

em

eggshell calcification of hilar or mediastinal lymph nodes

es

enlargement of hilar or mediastinal lymph nodes

hi

honeycomb lung

ho

septal (Kerley) lines

k

other significant disease (not related to dust exposure, such as surgical damage, trauma, bronchiectasis, etc.)

od

pleural plaque, uncalcified

pq

pneumothorax

px

rheumatoid pneumoconiosis (Caplan’s syndrome)

rl

tuberculosis, probably active

tba

tuberculosis, activity uncertain

tbu