Which bone is labeled H on a wrist radiograph?

Which bone is labeled H on a wrist radiograph?

• A. Hamate
• B. Trapezium
• C. Trapezoid
• D. Capitate

Answer: (A)

The question tests your ability to identify carpal bones on a wrist radiograph based on their anatomy and position. On a standard AP view, the distal row of carpal bones runs from the thumb side to the little finger side as trapezium, trapezoid, capitate, and hamate. The bone labeled H is located at the far ulnar end of this row, which is the hamate. The hamate has a distinctive hooked projection (the hamulus) on its palmar surface, a feature that helps confirm its identity on radiographs. It also sits adjacent to the capitate and articulates with the 4th and 5th metacarpals. The other bones in the distal row—trapezium (thumb side), trapezoid (next to trapezium), and capitate (central)—do not occupy that most medial position, so they wouldn’t be labeled H in this view.

The question tests your ability to identify carpal bones on a wrist radiograph based on their anatomy and position. On a standard AP view, the distal row of carpal bones runs from the thumb side to the little finger side as trapezium, trapezoid, capitate, and hamate. The bone labeled H is located at the far ulnar end of this row, which is the hamate. The hamate has a distinctive hooked projection (the hamulus) on its palmar surface, a feature that helps confirm its identity on radiographs. It also sits adjacent to the capitate and articulates with the 4th and 5th metacarpals. The other bones in the distal row—trapezium (thumb side), trapezoid (next to trapezium), and capitate (central)—do not occupy that most medial position, so they wouldn’t be labeled H in this view.