RT Journal
T1 The symptomatic os subfibulare. Avulsion fracture of the fibula
associated with recurrent instability of the ankle
JF The Journal of Bone & Joint Surgery
JO The Journal of Bone & Joint Surgery
YR 1991
FD September 1
VO 73
IS 8
SP 1251
OP 1254
DO 
UL http://dx.doi.org/
AB Four adults who had symptomatic instability of the ankle had an
associated os subfibulare. Operative exploration revealed the ossicle to
represent a non-union of an avulsion fracture of the anterior talofibular
ligament. These findings suggest that an os subfibulare represents an
avulsion fracture that may or may not be associated with laxity of the
anterior talofibular ligament, rather than being a normal variant.