Question 1817
{"accessible":true,"alternatives":[{"id":9025,"text":"accessory navicular bone type 1 "},{"id":9026,"text":"accessory navicular bone type 2 "},{"id":9027,"text":"accessory navicular bone type 3"},{"id":9028,"text":"accessory navicular syndrome"},{"id":9029,"text":"navicular bone fracture"}],"archived":false,"correctAlternativeId":9028,"explanation":"\u003cp\u003eThis selected axial T2 fat sat images shows an accessory bone of triangular shape measuring about 10 mm adjacent to the posteromedial tuberosity of the navicular bone, with a cartilaginous connection between them. This is in keeping with a type II accessory navicular bone according to the\u0026nbsp;Geist classification with associated bone marrow edema involving both the accessory ossicle and navicular bone.\u003c/p\u003e\u003cp\u003eAccessory navicular syndrome occurs when a type II\u0026nbsp;accessory navicular\u0026nbsp;becomes painful due to movement across the pseudo-joint between the ossicle and the navicular bone. MRI typically shows bone marrow edema involving both the accessory ossicle and navicular bone (as in this case).\u003c/p\u003e\u003cp\u003eAcute pain can be managed by corticosteroid injection and immobilization of the foot for 2-3 weeks. For refractory cases, surgical management can be considered.\u003c/p\u003e","id":1817,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/302/accessory-navicular-syndrome-5_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":83409},"imageAttributionCaseInfo":{"title":"Accessory navicular syndrome","contributor_name":"Ammar Haouimi","contributor_param":"ammar-haouimi","case_rid":83409,"case_param":"accessory-navicular-syndrome-5"},"firstQuestionPath":"/questions/1817","nextQuestionPath":null,"relatedArticles":[{"id":40007,"title":"Navicular","link":"/articles/navicular?lang=us"},{"id":65413,"title":"Navicular fracture","link":"/articles/navicular-fracture-2?lang=us"},{"id":1785,"title":"Accessory navicular","link":"/articles/accessory-navicular-2?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA 30-year-old\u0026nbsp;man presents with painful right medial foot. What is the most likely diagnosis shown on this selected axial T2 fat sat image?\u0026nbsp;\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1817"}],"attemptsPercentages":[{"alternativeId":"9025","percentage":11},{"alternativeId":"9028","percentage":35},{"alternativeId":"9027","percentage":8},{"alternativeId":"9029","percentage":12},{"alternativeId":"9026","percentage":34}],"promptToLogin":false,"questionManager":false,"articleId":"accessory-navicular-syndrome"}