DeQuervain’s Tendonitis

First dorsal compartment tendonitis, more commonly known as DeQuervain’s tendonitis or tenosynovitis after the Swiss surgeon Fritz de Quervain, is a condition brought on by irritation or inflammation of the wrist tendons at the base of the thumb. The inflammation causes the compartment (a tunnel or a sheath) around the tendon to swell and enlarge, making thumb and wrist movement painful. Making a fist, grasping or holding objects—often infants—are common painful movements with DeQuervain’s tendonitis.

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