Stenosing tenosynovitis of flexor tendon Sheath
Fibro Cartilage metaplasia of A1 pulley leading to trilaminar structure of A1 pulley
Paediatric Trigger Thumb is due to thickening and degeneration of FPL by Collagen and Synovial proliferation 60% resolve by 2 years
Written/reviewed by Kishore Puthezhath
Professor of Orthopaedics and Consultant Paediatric Orthopaedic Surgeon
FRCS (Tr & Orth) revision resource
Reviewed: September 2026
Core revision references: Miller's Review of Orthopaedics; Campbell's Operative Orthopaedics; Orthobullets. Current specialty guidelines are linked within individual notes where applicable.