Tenosynovitis and longitudinal tear of the long fibular tendon caused by hypertrophy of the peroneal tubercle

Background. Tenosynovitis and longitudinal rupture of the tendon of the long fibular muscle linked to hypertrophy of the fibular tubercle of the calcaneus are relatively uncommon conditions. The literature has documented isolated clinical cases, but there is a lack of comprehensive research on diagnosing and treating these ailments.Aim. This article seeks to present an effective surgical treatment option along with mandatory diagnostic blockade for a patient with hypertrophic fibular tubercle complicated by tenosynovitis and longitudinal rupture of the tendon of the long fibular muscle.Case description. This article describes a rare clinical case involving tenosynovitis and longitudinal rupture of the tendon of the long fibular muscle, which is associated with hypertrophy of the fibular tubercle of the calcaneus. After examination, diagnostic blockade and unsuccessful conservative therapy, the decision was made to pursue surgical intervention.. The surgical procedure involved resection of the fibular tubercle and tubularisation of the tendon of the long fibular muscle. Eight months after treatment, there was no recurrence of symptoms.Conclusion. This clinical case illustrates the successful outcome of surgical intervention for a patient with hypertrophic fibular tubercle tenosynovitis, and longitudinal rupture of the tendon of the long fibular muscle. Diagnostic blockades can be beneficial for identifying the primary cause of foot pain and devising appropriate treatment strategies.