One Inflammatory System, Many Clinical Expressions

Why does overlapping inflammatory biology give rise to such different diseases? Lindsay Ackerman, MD, compares how Type 2 signaling plays out across atopic dermatitis, prurigo nodularis, chronic spontaneous urticaria, and bullous pemphigoid. She follows the barrier-itch cycle of AD, the pairing of neural sensitization and fibrosis behind PN nodules, mast-cell activation and IgE signaling in CSU, and the autoantibody production at the core of BP, showing how shared signaling and disease-specific biology combine to shape what clinicians see.