The Teaching Point

Os styloideum may be a bothersome and inconvenient condition but as a rare anatomical variant is usually not suspected, and may be missed on clinical and radiological assessment. Early and proper detection of this accessory bone makes it a “do not touch lesion” that does not require a biopsy or excision. Primarily, it can be treated conservatively without initial need for surgical approach. The general awareness of this easily detectable lesion should be raised.






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From the manuscript

That`s my STYLEoideum - Symptomatic os styloideum in an adolescent male

Free full text article: That`s my STYLEoideum -  Symptomatic os styloideum in an adolescent male

Abstract
We present a 15-year-old male patient with persistent localized pain on the dorsal side of the left wrist between the base of the 2nd and 3rd metacarpal bones and over the third carpometacarpal joint. It was diagnosed as an accessory metacarpal bone -Os styloideum. This entity may be detected on plain radiographs and in ultrasound examination and is often asymptomatic. Symptomatic os styloideum occurs more frequently in the dominant hand and may be treated conservatively with corticosteroid infiltration. A palpable prominence on the dorsal side of the wrist and focal pain evoked anxiety of the adolescent patient who searched medical consultation. In the clinical examination, a bony protrusion was confirmed and different possible diagnoses have been considered. After treatment with a corticosteroid infiltration of the third carpometacarpal joint under fluoroscopy the pain resolved completely. We would like to draw attention of clinicians and radiologists to this rare anatomical variant that normally is asymptomatic, and therefore not immediately recognized. Acquaintance with this entity and its early detection may lead to conservative treatment instead of surgical excision. A comprehensive literature search, review and discussion about os styloideum are provided in the article.






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1. Os styloideum

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