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Background: A paradoxical reaction (PR) is a phenomenon in which the primary tuberculous lesion worsens or another de novo tuberculous lesion appears while on anti-tuberculosis therapy. Here, we report a rare case of cerebellar tuberculoma caused by a PR during therapy for lumbar tuberculous spondylitis (Pott’s disease). Case Description: A 47-year-old male with human immunodeficiency virus seronegative was diagnosed with lumber tuberculous spondylitis (Pott’s disease) and prescribed anti-tuberculous agents. His lower back pain and inflammatory condition recovered after initiation of anti-tuberculous therapy. Two months later, he complained of headache, nausea, and staggering. Magnetic resonance images revealed a ring-enhanced lesion located at the cerebellar hemisphere extending to the vermis, which caused perifocal edema and bilateral ventriculomegaly. These findings were consistent with his symptoms of hydrocephalus. He did not have preceding clinical findings of meningitis, and a PR was suggested to cause de novo aggregation of cerebellar tuberculoma. A lesionectomy was performed, and the surgical specimen was pathologically diagnosed as a tuberculoma. He recovered well from neurological disorders after the resection. Conclusion: De novo formation of intracranial tuberculoma alone caused by a PR without preceding meningitis is very rare. Lesionectomy is needed for intracranial tuberculoma, which manifests as a mass effect, as well as antituberculous therapy.

A surgical case of cerebellar tuberculoma caused by a paradoxical reaction while on therapy for tuberculosis spondylitis