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Clin Radiol. 2019 Jan;74(1):80.e1-80.e6. doi: 10.1016/j.crad.2018.09.013. Epub 2018 Oct 28.

The relationship of MRI findings and clinical features in symptomatic and asymptomatic os naviculare.

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Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, Middlesex HA74LP, UK. Electronic address:
Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, Middlesex HA74LP, UK.



To investigate the relationship between magnetic resonance imaging (MRI) findings and clinical features in patients with os naviculare.


All patients with a foot or ankle MRI study showing an os naviculare were identified from a specialist orthopaedic hospital between 2014 and 2017. A total of 110 patients with 133 os naviculare were included. The MRI features were recorded, as well as the presence or absence of medial foot pain and/or tenderness over the navicular tuberosity. Fisher's exact test was used for categorical data and unpaired t-tests for continuous data. Specificity and sensitivity were calculated for MRI features.


There were 80 female and 30 male patients with a mean age of 46±1.7 years at time of MRI (range 11-90.6 years). There was a significant correlation between os naviculare oedema (p=0.008) and navicular tuberosity oedema (p=0.001) with a history of medial foot pain. There were significant associations between mean age (p=0.003), type of os naviculare (p=0.004), os naviculare oedema (p<0.001), navicular tuberosity oedema (p=0.001), and soft tissue oedema (p=0.01) with examination findings of tenderness over the navicular tubercle. Oedema of the os naviculare, navicular tuberosity, or soft tissues were found to have a high specificity but low sensitivity for medial foot pain and tenderness.


When present, certain MRI findings indicate that an os naviculare is likely to be a cause of patient symptoms, but when absent they do not exclude the possibility of it causing symptoms.

[Indexed for MEDLINE]

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