Parto Teb Azma

HX:41 year old man- chemical exposure- dry cough- dypnea.

Findings: Mosaic pattern with exaggeration on expiration.

Diagnosis: Obliterative bronchiolitis related to chemical

War injury.

Discussion:OB is a disorder caused by partial or complete

obstruction of bronchi and bronchioles by fibrous tissue

following an insult to the lower respiratory tract.

In pediatric population OB is frequently preceded by respiratory infections caused

by adenovirus, influenza or measles, wheras in adults

mycoplasma, collagen vascular disease, inhaled toxin (like

this patient), drug therapy or idiopathic are included.