BACKGROUND: It has been reported that ultrasonography (US) can detect the severity of congenital muscular torticollis (CMT), and severe fibrosis of the sternocleidomastoid (SCM) muscle noted on US is irreversible and likely to require surgery. Clinical outcome of CMT depends mainly on the patient's age, which is also associated with the severity of fibrosis as determined by US. However, there has been no well-designed study to elucidate the true relationship among these factors nor a definite consensus on treatment of young infants with severe fibrosis in the SCM compared with well-documented reports that late cases require surgery. PURPOSE: The purpose of the current study was to investigate whether severity of SCM fibrosis on US is correlated with clinical severity and outcome of standardized physiotherapy in early presenting CMT. METHODS: Fifty patients with a palpable neck mass, initial deficit of passive neck rotation (ΔROT) more than 10°, and age less than 3 months were classified into 4 US types according to the severity of fibrosis in the SCM and underwent standardized physiotherapy and regular assessment. Relationship between US types and 2 variables (ΔROT and treatment duration) and success rate of physiotherapy was assessed. RESULTS: None of the cases was classified as type 4. Type 3 showed greatest ΔROT and longest mean treatment duration. Both variables showed a significant linear trend of association with US types by P for trend (P = .003, P < .001, respectively). Treatment was "successful" in 49 patients (98%). CONCLUSION: In young infants with CMT, US can document severity; and an early and adequate physiotherapy is a good treatment option, particularly even in those with severe fibrosis.
BACKGROUND: It has been reported that ultrasonography (US) can detect the severity of congenital muscular torticollis (CMT), and severe fibrosis of the sternocleidomastoid (SCM) muscle noted on US is irreversible and likely to require surgery. Clinical outcome of CMT depends mainly on the patient's age, which is also associated with the severity of fibrosis as determined by US. However, there has been no well-designed study to elucidate the true relationship among these factors nor a definite consensus on treatment of young infants with severe fibrosis in the SCM compared with well-documented reports that late cases require surgery. PURPOSE: The purpose of the current study was to investigate whether severity of SCM fibrosis on US is correlated with clinical severity and outcome of standardized physiotherapy in early presenting CMT. METHODS: Fifty patients with a palpable neck mass, initial deficit of passive neck rotation (ΔROT) more than 10°, and age less than 3 months were classified into 4 US types according to the severity of fibrosis in the SCM and underwent standardized physiotherapy and regular assessment. Relationship between US types and 2 variables (ΔROT and treatment duration) and success rate of physiotherapy was assessed. RESULTS: None of the cases was classified as type 4. Type 3 showed greatest ΔROT and longest mean treatment duration. Both variables showed a significant linear trend of association with US types by P for trend (P = .003, P < .001, respectively). Treatment was "successful" in 49 patients (98%). CONCLUSION: In young infants with CMT, US can document severity; and an early and adequate physiotherapy is a good treatment option, particularly even in those with severe fibrosis.