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Genetic and Rare Diseases Information Center (GARD)

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Accessory navicular bone


* Not a rare disease
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An accessory navicular bone is a small bone located in the middle of the foot. It is near the navicular bone, the bone that goes across the foot near the instep. It is a common trait, estimated to be in approximately 2 to 12% of the general population and up to 14% of children. This bone may develop a bump that can cause irritation, swelling, and pain.[1] Click here to view a diagram of the foot.
Last updated: 5/27/2009


  1. Accessory Tarsal Navicular. MDConsult. 2002; Accessed 5/28/2009.
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  • The Online Mendelian Inheritance in Man (OMIM) is an catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Accessory navicular bone. Click on the link to view a sample search on this topic.