A 5-year-old girl presents with a 2-week history of recurrent cough and low-grade fever. Flexible laryngoscopy shows a smooth, grayish-white object lodged at the level of the false vocal cords. Which finding best distinguishes an organic foreign body (peanut) from an inorganic foreign body (plastic bead) in the larynx?

## Organic vs. Inorganic Foreign Body: Laryngeal Distinction ### Pathophysiological Differences Organic and inorganic foreign bodies elicit different tissue responses based on their chemical composition and degradation properties. ### Comparison Table | Feature | Organic FB (Peanut, seed) | Inorganic FB (Plastic, metal, bead) | |---------|---------------------------|-------------------------------------| | **Tissue reaction** | Granulation, edema, inflammation | Minimal inflammation initially | | **Timeline** | Delayed presentation (days–weeks) | Often acute presentation | | **Mucosal changes** | Granulation tissue, ulceration | Smooth, clean interface | | **Fever/infection** | Common (bacterial colonization) | Rare unless secondary infection | | **Odor/discharge** | Purulent, foul-smelling | Absent or minimal | | **Aspiration history** | Often forgotten or delayed recall | Usually acute, remembered event | | **Endoscopic appearance** | Friable, surrounded by inflammation | Smooth, well-demarcated | **Key Point:** Organic foreign bodies trigger a robust inflammatory response with granulation tissue formation and mucosal edema because they are biodegradable and incite a foreign body reaction. This occurs over days to weeks. Inorganic objects are inert and produce minimal tissue reaction unless secondary infection develops. ### Clinical Pearl A child presenting with a 2-week history of cough and fever with granulation tissue around the FB strongly suggests an organic FB. The delayed presentation and inflammatory response are hallmarks. Inorganic FBs often present acutely (within hours) because the child or parent recalls the aspiration event. **High-Yield:** Granulation tissue and mucosal edema are the best discriminators between organic and inorganic FBs. Organic FBs are "dirty" (induce inflammation, infection, granulation); inorganic FBs are "clean" (inert, minimal tissue reaction). ### Mnemonic **ORGANIC = Inflammatory response; INORGANIC = Inert** — Organic → Granulation, edema, fever, purulent discharge — Inorganic → Smooth, clean, minimal inflammation