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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Curschmann's crystals are seen in -
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The correct answer is  Pathology of Asthma
Gross -

Lungs are overdistended because of overinflation and there may be a small area of atelectasis.
The most striking macroscopic finding is occlusion of bronchi and bronchioles by thick tenacious mucus plugs.

Histology -

Characterized by the presence of numerous eosinophils and neutrophils.

Curschmann's spiral - Whorls of shed epithelium in mucous plugs.
Charcot -Leyden crystals - Collection of crystalloids made up of eosinophilic membrane protein.
The other characteristic histological finding of Asthma is collectively called Airway remodelling, it includes -

Thickening of the basement membrane of the bronchial epithelium.
Edema and an inflammatory infiltrate in the bronchial walls with a prominence of eosinophils and mast cells.
An increase in the size of submucosal glands.
Hypertrophy of bronchial wall muscle.

The "airway remodelling" contributes to airflow obstruction.