An injury to the shown area can lead to fracture of which bone (FMGE June 2019)

Anatomical snuff box: The given picture shows anatomical snuff box which is a depression formed at the posterolateral side of the wrist and metacarpal by the extensor tendons passing into the thumb. Base of the triangle is at the wrist and apex is directed into thumb. It is most apparent when thumb is extended. Boundaries: Lateral: Abductor pollicis longus and extensor pollicis brevis tendons. Medial :Extensor pollicis longus tendon Floor: Scaphoid and trapezium the distal ends of the tendons of the extensor carpi radialis longus and extensor carpi radialis brevis Scaphoid Fracture: The commonest carpal injury is a fracture across the waist of the scaphoid bone . It is uncommon to see other injuries. In approximately 10% of individuals, the scaphoid bone has a sole blood supply from the radial aery, which enters through the distal poion of the bone to supply the proximal poion. When a fracture occurs across the waist of the scaphoid, the proximal poion therefore undergoes avascular necrosis.