Buffalo Horn Sign – A New Finding on MRI for Meniscal Bucket-Handle Tears
Rafael R. Pereira, João Cabral, João Janeiro, José Padín, Joaquim Soares do Brito, Rodrigo A. Goes

TL;DR
This paper introduces a new MRI sign called the 'buffalo horn' for identifying displaced bucket-handle meniscal tears.
Contribution
The buffalo horn sign is a novel MRI finding specific to displaced bucket-handle meniscal tears.
Findings
The buffalo horn sign was present in 46.4% of included patients with bucket-handle tears.
The sign was associated with other indicators of meniscal displacement but absent in healthy menisci.
It is a relevant and easily identifiable feature in axial MRI slices for clinical decision-making.
Abstract
Descrever um novo sinal em imagens axiais de ressonância magnética (RM) de pacientes com rupturas em alça de balde do menisco. De 610 pacientes consecutivos com diagnóstico cirúrgico de ruptura do menisco, aqueles com padrão em alça de balde foram escolhidos, e 28 atenderam aos critérios de inclusão. O mecanismo de lesão mais frequente foi a torção com ou sem estresse coronal (16 pacientes). Além disso, a lesão foi relacionada ao esporte em 12 casos. Todos os pacientes eram sintomáticos e tinham radiografias que mostravam a preservação da linha articular. Em seguida, seus exames de RM foram analisados. O padrão de chifre de búfalo foi encontrado em 13 pacientes (46,4%) no menisco medial ou lateral. Foi o 3 o sinal mais prevalente, depois do fragmento no interior da incisura intercondilar ( n = 21; 75,0%) e da ausência do sinal da gravata borboleta ( n = 17; 60,7%). Observamos uma…
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Taxonomy
TopicsTendon Structure and Treatment · Lower Extremity Biomechanics and Pathologies · Knee injuries and reconstruction techniques
