Sometimes I find that my patients with tailbone pain (coccyx pain, coccydynia) actually have a mass, cyst, tumor, or cancer either within the tailbone itself or in the nearby tissues. Examples can include pilonidal cyst, retro-rectal hamartoma (tailgut cyst), chordoma (a type of bone cancer that tends to happen at the coccyx and is […]
Which is better when evaluating tailbone pain (coccyx pain), an MRI or a CT scan? CT scan can be very good at showing bone, but MRI can show not only bone but ALSO give good definition of soft tissue structures. Some of the soft tissue structures that show up clearly on MRI include: abscess (which […]
Typical MRI and CT scans are normally done in a horizontal position (while you are lying down).
These tests can provide helpful information, BUT in MANY cases the tailbone will look normal while someone is lying down but will be clearly abnormal/dislocated while the person is sitting with her body weight onto the tailbone.