Rosai-Dorfman disease (RDD) otherwise known as sinus histiocytosis with massive lymphadenopathy (SHML), is a very rare and benign disorder of unknown etiology with < 10% bone involvement. The following is a case seen at our hospital of a patient presenting with several months’ onset unspecified non traumatic ankle pain. There was no physical mass or lymphadenopathy appreciated on exam. Plain radiographs and MRI demonstrated an osteolytic lesion at the medial malleolus. Biopsy revealed the dia...

Peroneal subluxation is relatively rare and commonly misdiagnosed as an ankle sprain. Due to its rarity, the incidence of subluxation is unknown, but it has been seen most often in young adults. Peroneal subluxation in pediatric patients is very rare and bilateral subluxation is even rarer. We present a pediatric case of bilateral peroneal tendon subluxation caused by minimal trauma with no known risk factors. Based on a literature review, this is the first reported case of acquired bilateral pe...