J Korean Radiol Soc.  2005 Nov;53(5):381-386. 10.3348/jkrs.2005.53.5.381.

Naviculo-Medial Cuneiform Coalition: Radiological Features

• Choi YS
• Kim SM
• Lee KT
• Young KW
• Bae SJ
• Ahn JM
• Shin MJ

• KMID: 1582636
• DOI: http://doi.org/10.3348/jkrs.2005.53.5.381

Abstract

PURPOSE: To define the radiological features of the naviculo-medial cuneiform coalition.
MATERIALS AND METHODS
This study examined 35 feet from 25 patients (mean age 26 years) with a naviculo-medial cuneiform coalition. The images were analyzed retrospectively with regard to irregular articular surface, subchondral sclerosis, subchondral cyst, beak-like spur, the change in joint space, bony fusion seen on plain radiographs (n=35) and CT (n=14), and the histological type of coalition on MRI (n=3). The extent of joint involvement was also evaluated.
RESULTS
Of the 35 feet, plain radiographs and/or CT showed an irregular articular surface in 34 (97.1%), subchondral sclerosis in 30 (85.7%), a subchondral cyst in 29 (82.9%), a beak-like spur in 23 (65.7%), a narrowing of the joint space in 24 (68.6%) and no bony fusions (0%). The T1-weighted images revealed low signal intensity, and the T2-weighted fast spin-echo and gradient images revealed high signal intensity in the three feet with a cartilaginous coalition. The coalition involved the plantar part of the joint in all 35 feet.
CONCLUSION
The characteristic radiological features of a naviculo-medial cuneiform coalition include an irregular articular surface with possible secondary degenerative changes in the plantar margin of the joint, non-osseous type.

Keyword

Foot, abnormalities; Foot, radiography; Foot, CT; Foot, MR

MeSH Terms

Bone Cysts
Foot
Humans
Joints
Magnetic Resonance Imaging
Retrospective Studies
Sclerosis