Clinical Features:

• The most common cause of a suppurative granulomatous response
• Present as a tender, erythematous nodule

Histologic Features:

• Dense, nodular, follicle-centered inflammatory infiltrate comprised predominantly of neutrophils, macrophages and giant cells
• Fragments of hair and/or keratinous debris are seen within the infiltrate and phagocytized by by multinucleated giant cells.
• The inflammatory response sometimes extends into the subcutaneous fat with a resultant lobular panniculitis.

Cases associated with this book:

Ruptured follicular cyst
Author: Artur Zembowicz M.D. Ph.D.

Conference: Dermpedia Teaching Collection