Tuberculosis of the spine. Magnetic resonance imaging (MRI) scan of a sagittal section through the spine of a 74-year-old patient with tuberculosis (TB) of the spine, or Pott's disease, showing collapse of two thoracic vertebrae (T11 and T12, upper centre). Pott's disease causes the softening, collapse and inflammation of vertebrae, and often leads to a hunchback deformity. It is a secondary disease to TB where the tuberculosis bacteria move from the lungs to the spine.