Which of the following is NOT a major cause of a pyogenic granuloma?

• A. Chalazion
• B. Trauma
• C. Surgery
• D. Staph infection

Answer: (D)

A pyogenic granuloma is a reactive vascular lesion that develops after irritation or injury, driven by an exaggerated wound-healing response with release of angiogenic factors that promote rapid capillary growth. In the eyelid and ocular surface, this most often follows trauma or surgical manipulation, where the inflammatory environment sparks a lobular proliferation of blood vessels that bleeds easily. A Staphylococcus infection does not initiate this vascular proliferation; it may complicate or accompany ocular surface disease, but it is not the inciting factor that creates a pyogenic granuloma. Therefore, infection with Staph is not a major cause, whereas trauma and recent surgery are classic triggers for this lesion. Chalazion, being a different chronic inflammatory process of the Meibomian glands, is not a typical initiating event for a pyogenic granuloma, reinforcing why the infection option is the one that does not fit as a major cause.