Pott's disease (tuberculous spondylitis)

Abstract

Pott's disease is a vertebral infection caused by Mycobacterium tuberculosis. Indolent nature and subacute course are associated with late diagnosis. A clinical case is presented whose diagnosis was delayed by atypical presentation with progressive worsening of symptoms. Magnetic resonance imaging (MRI) of the dorsolumbar spine revealed T7–T8 angulation suggestive of secondary injury, with intracanalar extension and spinal cord compression. Gastric aspirate cultures, direct microscopy, and polymerase chain reaction (PCR) were A 79-yearold female came to the emergency department with right back pain, pleuritic, with 12 h of evolution. Anorexia and weight loss,1 month evolution. Computed tomography (CT) of the dorsal spine revealed T7–T8 lytic lesions, suggestive of secondary nature. Objectively:weight loss and pain during thoracic palpation. Annalistically: normocytic/normochromic anemia, hypercalcemia, hepatic cholestasis, C-reactive protein (CRP) 7.12 mg/dL. Chest X-ray and electrocardiogram without alterations. She was admitted in Internal Medicine service. Analytically: hypophosphatemia, parathyroid hormone elevated, CRP 6 mg/dL, Beta-2 microglobulin elevated, dyslipidemia, iron and folicacid deficiency.negative for M. tuberculosis. T8 aspiration CT guided: cultures/direct microscopy negative, PCR positive for M. tuberculosis. Introductionof antitubercular drugs. Worsening of symptomatology, with paraparesia. MRI of the dorsal spine revealed spondylodiscitis and spinal cordcompression in T7–T8. Diagnosis revealed vertebral tuberculosis with spinal cord compression. She was transferred to neurosurgery servicefor surgical treatment. There was clinical and analytical improvement. Draws attention to difficulty in diagnose a treatable disease in a patientwith a rare presentation.

Keywords

• antitubercular drugs
• latent tuberculosis infection
• mycobacterium tuberculosis
• spinal cord compression