Articular cartilage flap tear of patella is a rare injury that occurs in children. Diagnosis is difficult both clinically and radiologically. Apart from knee swelling and retro-patellar tenderness, there is no other clinical finding. We report a case of 16 year old boy who suffered from patella cartilage flap tear without visible bony fragments. Mini-open reduction, microdrilling, sealing of margins with fibrin glue and double breasting of medial patellar retinaculum was performed. Early weight

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... bearing was achieved together with a satisfactory range of knee motion. An awareness of cartilage flap tear, together with its characteristic clinical and radiological features and proper treatment is necessary to avoid misdiagnosis and treatment delay. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (creativecommons.org/licenses/by/3.0) Conflict of interest: None declared | Source of funding: Nil | DOI: http://dx.