Loosely formed granuloma in hypersensitivity pneumonitis

A high power view shows a "loose" poorly-defined granuloma. Cholesterol clefts are seen in multinucleated giant cells.

Reproduced with permission from: Barrios R, Kerr KM. Hypersensitivity pneumonitis. In: Color Atlas and Text of Pulmonary Pathology, 2nd Edition, Cagle PT, Allen TC, Barrios R, et al (Eds), Philadelphia: Lippincott Williams & Wilkins, 2008. Copyright © 2008 Lippincott Williams & Wilkins. www.lww.com.

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