What is curshmann spirals?

Curshmann spirals are a characteristic feature that can be observed in sputum samples from patients with asthma or other respiratory conditions. These spirals are composed of mucus strands that are coiled into a helix shape, often enclosing eosinophils (a type of white blood cell) or other inflammatory cells. The presence of Curshmann spirals in sputum can indicate airway inflammation, and is often used as a diagnostic tool for asthma. The exact mechanism behind the formation of these spirals is not entirely understood, but it is thought to be related to the thickening and increased viscosity of mucus in the airways of individuals with respiratory conditions.