Proximal linear extension of skin hypopigmentation after ultrasound-guided corticosteroid injection for de Quervain tenosynovitis: A Case Report

De Quervain tenosynovitis is a stenosing tenosynovitis of the first dorsal compartment of the wrist that can lead to painful functional impairment of the upper limb. This case report describes a rare adverse effect of corticosteroid injection which is local skin atrophy and hypopigmentation with proximal linear extension. In this case, hypopigmentation developed from the wrist to beyond the elbow after corticosteroid injection with ultrasound guidance and targeted placement of the injectate in the extensor tendon sheath of the first dorsal compartment.

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