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Connect & DownloadA rare bone disease characterized by spontaneous adult-onset tarsal navicular osteonecrosis. Patients present with chronic mid- and hindfoot pain, swelling and tenderness over the dorsomedial aspect of the midfoot, flattening of the medial longitudinal arch, and pes planovarus. Radiographic findings include comma-shaped deformity due to collapse of the lateral part of the navicular bone and medial or dorsal protrusion of a portion or the entire bone. The condition may be bilateral or asymmetric and associated with pathological fractures.
The Genetic and Rare Diseases Information Center (GARD) has information and resources for patients, caregivers, and families that may be helpful before and after diagnosis of this condition. GARD is a program of the National Center for Advancing Translational Sciences (NCATS), part of the National Institutes of Health (NIH).
View reportOrphanet has a summary about this condition that may include information on the diagnosis, care, and treatment as well as other resources. Some of the information and resources are available in languages other than English. The summary may include medical terms, so we encourage you to share and discuss this information with your doctor. Orphanet is the French National Institute for Health and Medical Research and the Health Programme of the European Union.
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