<unk>  or<unk>  disease is a presentation of extrapulmonary tuberculosis that affects the spine. The lower thoracic and upper lumbar vertebrae are most commonly affected. Scientifically, it is called tuberculous spondylitis and it is most commonly localized in the thoracic portion of the spine.<unk>  results from haematogenous spread of tuberculosis from other sites, often pulmonary. The infection then spreads from two adjacent vertebrae into the adjoining intervertebral disc space. If only one vertebra is affected, the disc is normal, but if two are involved, the disc, which is avascular, cannot receive nutrients and collapses. The disc tissue dies and is broken down by caseation, leading to vertebral narrowing and eventually to vertebral collapse and spinal cord compression.
Pott's disease
Jeune's disease
Darier's disease
Haff disease
Salla disease
Kummell disease
Lev's disease
Slone's disease