Wheezing is an unexpected finding in which disorder?

Pulmonary disorder.

Wheezing is a relatively high pitched whistling noise produced by movement of air through narrowed or compressed small airways. Its a symptom as well as finding. The most common cause of wheezing is Asthma but not all wheezing is asthma while acute onset of wheezing in a patient without a lung disorder maybe due to aspiration, allergic reaction or heart failure.

Bronchiolitis

It is a common lung infection affecting the tiny airways called the bronchioles. It often affects infants and young children because their small airways can be blocked easily than those older kids. Usually, the first symptoms are stuffy nose and congestion, cough, and fever. When these symptoms last a day or two are followed by worsening a cough and wheezing.