A CT sacrum is a computed tomography scan focused on the sacrum — the triangular bone at the base of the spine between the hips. It uses X‑rays to produce detailed cross‑sectional images to detect fractures, degenerative changes, infections, tumors, or sacroiliac joint problems. The scan is quick, may use contrast for better detail, and involves a small amount of ionizing radiation.

Yes. A CT scan can clearly image the coccyx (tailbone), showing fractures, bone alignment, degenerative changes, and bony lesions with high detail. It’s often used when X-rays are inconclusive or for surgical planning. For soft-tissue injury, marrow edema, or suspected infection, MRI is preferred. CT involves radiation, so use is based on clinical need.

A CT scan can clearly show bony spine problems—fractures, vertebral alignment, degenerative bone changes, and some spinal canal narrowing—but it's less sensitive than MRI for soft tissues such as discs, ligaments, the spinal cord, and nerve roots. CT myelography improves nerve visualization. CT is often used when detailed bone imaging is needed or when MRI is contraindicated.

Yes. Tumors can occur on the sacrum — primary bone tumors (e.g., chordoma, chondrosarcoma), metastatic cancer, or benign growths. Symptoms include persistent low back/buttock pain, nerve-related numbness or weakness, and bowel or bladder changes. Diagnosis uses imaging (X‑ray, MRI, CT) and biopsy. Treatment depends on tumor type and may include surgery, radiation, and/or chemotherapy, often coordinated by a multidisciplinary team.

A CT scan can show sacroiliac (SI) joint problems that affect bone: fractures, joint-space narrowing, sclerosis, erosions, osteophytes, and ankylosis. It provides excellent bony detail and is useful for trauma or chronic degenerative change. CT is less sensitive than MRI for early inflammatory or soft-tissue abnormalities and active sacroiliitis; MRI is preferred when inflammation is suspected.

The sacrum is a large, triangular bone at the base of the spine formed by fusion of five sacral vertebrae. It connects the lumbar spine to the pelvis via sacroiliac joints, transferring body weight to the legs, protecting pelvic organs, and serving as an attachment point for muscles and ligaments. It articulates above with L5 and below with the coccyx.