Polymyositis - with interstitial pneumonitis

Bilateral fairly symmetrical predominantly basal inter- and intraloboular septal thickening. Few scattered areas of subpluralsub-pleural small cystic changes which could represent early honeycombing of traction bronchiectasis. There is bilateral basal traction bronchiectasis with mild architectural distortion.

The findings could represent early UIP or fibrotic NSIP. No pleural effusion. The pulmonary artery trunk is not dilated to suggest pulmonary arterial hypertension.