- Rare congenital anomaly where bone tissue develops in soft tissue.
- It can be located at any level of the pelvic bones or even in the anterior abdominal wall
- Asymptomatic benign entity which is usually discovered incidentally.
- Recognition of this benign anomaly is important to avoid unnecessary clinical investigations or even interventions.
- Radiological differentiation from heterotopic ossification (post-traumatic myositis ossificans) and avulsion fractures of the pelvis can usually be made because of the typical appearance of the pelvic digit and the absence of a history of trauma.
 Imaging Findings
 Plain film
- A rib- or digit-like bony structure with a clear cortex and medulla and with one or more pseudoarticulation.
Patient #1: Radiographs and CT images demonstrate a pelvic digit
 See Also
 External Links
- Van Breuseghem, I. The pelvic digit: a harmless "eleventh" finger. Br J Radiol 2006 79: e106-107