Premium
Contrasting echogenicity in flexor digitorum profundus–flexor carpi ulnaris: A diagnostic ultrasound pattern in sporadic inclusion body myositis
Author(s) -
Noto YuIchi,
Shiga Kensuke,
Tsuji Yukiko,
Kondo Masaki,
Tokuda Takahiko,
Mizuno Toshiki,
Nakagawa Masanori
Publication year - 2014
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24056
Subject(s) - flexor carpi ulnaris , medicine , echogenicity , inclusion body myositis , forearm , extensor carpi ulnaris , myositis , polymyositis , anatomy , ultrasound , pathology , radiology , ulnar nerve , elbow
: In this study we aimed to clarify whether muscle ultrasound (US) of the forearm can be used to differentiate between patients with sporadic inclusion body myositis (s‐IBM) and those with s‐IBM–mimicking diseases. Methods : We compared the echo intensity (EI) of the flexor digitorum profundus (FDP) muscle and the flexor carpi ulnaris (FCU) muscles in patients with s‐IBM ( n = 6), polymyositis/dermatomyositis (PM/DM; n = 6), and amyotrophic lateral sclerosis (ALS; n = 6). Results : We identified EI abnormalities in 100% of patients with s‐IBM, 33% of those with PM/DM, and 33% of those with ALS. An “FDP–FCU echogenicity contrast,” a US pattern involving a higher EI in the FDP than in the FCU, was observed in all patients with s‐IBM, but in none of those with PM/DM or ALS. Conclusions : FDP–FCU echogenicity contrast in muscle US is a sensitive diagnostic indicator of s‐IBM. Muscle Nerve 49 : 745–748, 2014