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BACKGROUND   Herniation of an intervertebral disc (IVD) is found predominantly in the lumbar and cervical spine of both children and adults, but herniated IVDs of the thoracic spine are a rare occurrence. However, approximately 40% of herniated thoracic disc cases are calcified. Approximately 0.65% of all spinal herniations are calcified herniated thoracic discs (CHTDs). CHTDs can be treated conservatively or invasively, depending on the symptoms and degree of neurological deficit present.    OBSERVATIONS   The authors report a 44-year-old male with near complete reabsorption and disappearance of a CHTD. A review of the available literature indicates that there are only seven adult patients in whom this phenomenon has been reported.    LESSONS   Determining the best form of invasive treatment is a challenge for surgeons given the complexity of this condition. While the disappearance of calcified herniated discs of the lumbar and cervical spine has been reported, reports of the regression of CHTDs are rare. The disappearance of CHTDs is more commonly reported in children who undergo conservative treatment, while surgery is reserved for children who experience progressive pain and neurological deficit. Given the success of conservative treatment of CHTDs in children, conservative treatment methods should be considered when treating mildly symptomatic adults.

Spontaneous regression and near disappearance of a calcified herniated thoracic disc in a 44-year-old male: illustrative case