The Author Wishes to Point out the Following

CORRIGENDUM

“Idiopathic nonspecific interstitial pneumonia/fibrosis: comparison with idiopathic pulmonary fibrosis and BOOP”

S. Nagai, M. Kitaichi, H. Itoh, K. Nishimura, T. Izumi, T.V. Colby

Eur Respir J 1998; 12: 1010–1019.

The author wishes to point out the following.

In the Materials and methods of this article, the first sentence of the 4th paragraph should read:

BOOP, UIP and NSIP are described as follows: BOOP shows oedomatous tufts of granulation-type tissue, predominantly within airspaces, usually alveolar ducts, but often involving bronchioles as well.

and the first sentence of the 7th paragraph:

The 31 patients with NSIP were subdivided into two groups (cellular and fibrotic groups), which were further subcategorized according to the classification system of Katzenstein and Fiorelli [4] which was; Group I: cellular interstitial pneumonia, little fibrosis; Group II: cellular interstitial pneumonia, significant admixed fibrosis; and group III: fibrotic interstitial pneumonia, severe derangement of lung architecture.

Table 1 was also incorrectly printed. The correct version is printed below:

Table 1. – Histopathological features of idiopathic nonspecific interstitial pneumonia/fibrosis (NSIP) compared with other types of idiopathic interstitial pneumonia

Type of pulmonary lesion

Cellular Fibrotic UIP/IPF DIP BOOP DAD/AIP

NSIP NSIP

Distribution of pulmonary Diffuse Periacinar Periacinar Diffuse Centrilobular Diffuse

lesions predominant/ predominant/ predominant

diffuse and patchy

Type of intra-acinar fibrosis Homogeneous* Homogeneous* Heterogeneous+ Homogeneous* Homogeneous* Homogeneous*

Density of fibrotic lesions Loose Loose/Dense Dense Dense Loose Loose

Honeycombing‡ 0 0–+1 +1–+3 0–+1 0 0–+3

Fibrotic lesions with loss of 0–+2 +1–+3 +1–+3 0–+1 0 0–+3

normal alveolar structures‡

Hyaline membranes‡ 0 0 0 0 0 0–+3

Diffuse cellular infiltration +2–+3 +1–+3 ±–+1 +3 +1–+2 0–+1

in alveolar walls

Fibroblastic foci‡ 0 0–+2 +1–+3 0 0 0

Granulation tissues formed in +1–+2 0–+2 0–+1 0 +2–+3 0–+3

terminal air spaces

(BOOP) pattern‡

Data from Refs. [1–7].*: temporally homogeneous; +: temporally heterogeneous; ‡: 0: absent; ±: very mild; +1: mild; +2: moderate; +3: marked. UIP: usual interstitial pneumonia; IPF: idiopathic pulmonary fibrosis; DIP: desquamative interstitial pneumonia; BOOP: bronchiolitis obliterans-organizing pneumonia; DAD/AIP: diffuse alveolar damage/acute interstitial pneumonia.