Ever spotted this small, round bone near the cuboid on foot imaging? 👀 That’s the Os Peroneum — a normal accessory ossicle embedded within the peroneus longus tendon. Visible beautifully on X-ray, CT, and MRI, this little structure plays an important role in lateral foot mechanics! Though usually harmless, it can be involved in Painful Os Peroneum Syndrome (POPS), especially in runners and athletes. 🏃‍♂️⚽ --- 📸 Modalities: 1️⃣ X-ray – shows a small, well-corticated rounded bone near the later