The purpose of this article is to describe fire MR findings of Hallux Valgu
s (HV) and Hallux Rigidus (HR). Twenty-four patients (11 with HV, 4 with HR
, and 9 with both HV and HR) were studied at 1.5 Tesla MRI. Two separate ob
servers evaluated the first ray blindly for the following signs: sesamoid p
osition, sesamoid proliferation, hypertrophy of the median eminence, presen
ce of a lateral facet, presence of an adventitial bursa, shape of the first
metatarsal head, relative length of the first metatarsal, joint space loss
, osteophytes (dorsalor lateral), marrow edema, geodes, subchondral scleros
is, intra-articular ossicle, and pes planus. The most common findings obser
ved in HV were a hypertrophic medial eminence (95%1), sesamoid proliferatio
n (90%) and adventitial bursitis (70%). The most common findings observed i
n HR were osteophytes (77% and 69%), geodes, and marrow edema. We conclude
that traditional routine radiograph signs of HV and HR may be applied to MR
images. (C) Elsevier Science Inc., 2000.