Anteriorly angulated coccyx

Case contributed by Raffi Ourfalian


18 female presenting for coccygeal pain.

Patient Data

Age: 18
Gender: Female

Lateral view of the pelvis demonstrates an acute/sharp anterior angulation deformity between the first and second coccygeal segments.  This is consistent with a type III anteriorly angulated coccyx. 

Anterior view of the pelvis demonstrates non-visualization of the coccyx, which is consistent with angular deformity on the AP projection. 

Case Discussion

Anterior angulation of the coccyx is considered a normal variant, which is unrelated to trauma. Postacchini and Massobrio described 4 types of anteriorly angulated coccyges (types I - IV).

The above case contains a good teaching point in that if the coccyx is non-visualized on an AP view of the pelvis, a lateral view can be obtained to discern the angulation of the coccyx.  


This case was submitted with supervision and input from:

Soni C. Chawla, M.D.
Associate Professor
Department of Radiological Sciences
David Geffen School of Medicine at UCLA
Olive View - UCLA Medical Center

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Case information

rID: 47297
Published: 18th Aug 2016
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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