Coccygeal Region

Description

Centered at the inferior end of the posterior trunk, the coccyx lies distal to the sacrum and just superior to the intergluteal cleft, with the sacrococcygeal joint marking the terminal segment of the vertebral column. From a rear three-quarter perspective, the surface landmarks of the gluteal region frame the midline cleft, while the anal aperture sits anterior to the coccygeal tip within the perineum. The coccygeal region is bounded laterally by the buttocks and inferiorly approaches the perianal skin, a relationship that matters when teaching pelvic floor orientation in anatomical position. Small area, big implications. Pain at the tailbone, coccygodynia, often follows a backward fall onto the buttocks or prolonged sitting, and clinicians localize tenderness by palpation along the midline just inferior to the sacrum where the coccygeal segments can be variably fused. The close posterior relationship between the coccyx and the anorectal complex also explains why perianal abscesses, fistula-in-ano, and pilonidal disease can refer discomfort to the sacrococcygeal region and complicate examination in the intergluteal cleft. For procedural anatomy, this region orients the caudal epidural approach through the sacral hiatus, where correct identification of the midline and adjacent soft tissues reduces failed access and unintended subcutaneous injection. Educators can place this rendering in pelvic anatomy and surface anatomy modules to anchor landmarks before moving to deeper structures such as the levator ani, coccygeus, and anococcygeal raphe, and publishers can pair it with clinical text on perineal pain, anorectal disease, and trauma. It also suits patient-facing handouts explaining tailbone injury mechanics and why symptoms worsen with sitting. Anatomical accuracy verified by SciePro's Medical Advisory Board.