Tuberculosis MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Alejandro Lemor, M.D. [2]

Overwiew

MRI is used for the assessment of extrapulmonary tuberculosis, such as CNS tuberculosis, Pott's disease, and parotid gland tuberculosis.

MRI

CNS Tuberculosis

• MRI is most commonly used in cases of CNS infection with tuberculosis.
• The following findings may be seen in CNS tuberculosis:

• Ring-enhancing mass in T2 and hypodense lesion in case of a non-caseating tuberculoma.
• A caseating tuberculoma is seen as a hypodense lesion in both T1 and T2.
• Cerebral edema
• Diffuse enhancement in case of meningitis

Parotid Gland Tuberculosis

• Tuberculosis infection of the parotid gland con mimic a parotid neoplasm.
• The MRI shown below reveals a well-defined mass lesion, measuring 16 × 21 × 30 mm in size, hypointense on T1-weighted images, and hyperintense on T2-weighted images with homogenous contrast enhancement, located in the posterior part of the superficial lobe of the right parotid gland.

Image courtesy of Wikimedia Commons.