Symptomatic os trigonum in a football player- an anatomical disadvantage

Abstract

Os trigonum is a secondary ossification center at postero-lateral process of talus. The Steida process is an anatomical defect comprising of fused os trigonum. The entity has been linked with symptomatic Flexor hallucis longus (FHL) tenosynovitis. Activities or profession requiring hyper-plantar flexion of ankle trigger tenosynovitis and other related disorder. Symptomatic os trigum is an uncommon etiology of recalcitrant foot pain and diminished performance in sports involving intricate foot movements. The associated tendon disorders may further aggravate the problem. The cases refractory to conservative management should undergo detailed radiological evaluation to rule out any underlying defects. Appropriate management is warranted in the settings of anatomical variations like os trigonum or Steida process.