Misleading Diagnosis of Idiopathic Pulmonary Fibrosis: A Clinical Concern.

Diagnosis of Sjogren syndrome should be based on consideration of the clinical presentation, a pulmonary function test, blood and rheumatology laboratory findings, radiographic imaging patterns, and biopsy results.

Unusual Congenital Pulmonary Anomaly in an Adult Patient With Dyspnea.

This patient presented with scimitar syndrome, a rare combination of partial anomalous pulmonary venous return, right lung hypoplasia, and dextroposition of the heart.

Nitric oxide is involved in the response of the isolated intact and epithelium-denuded rat trachea to the β₂ adrenergic receptor agonist salbutamol.

Background: The involvement of the airway smooth muscle mediator nitric oxide (NO) in the actions of the β₂ agonist salbutamol (Sal), a well-known bronchodilator, is very poorly understood.

Objectives: To determine if endogenous NO release is a major factor in the Sal-induced relaxation of the carbachol- and electrical field-stimulated rat trachea and determine the role of the tracheal epithelium as the possible source of NO involved in these effects.

Methods: Isolated carbachol- or electric field-stimulated pre-contracted in vitro male Sprague Dawley rat tracheas (with epithelium intact or denuded) were relaxed with incremental or discrete concentrations of Sal in the presence and absence of the NO synthesis inhibitor L-NAME.