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Paradoxical progression of tuberculous lesions during chemotherapy of central nervous system tuberculosis. Report of four cases.

The peculiar phenomenon of paradoxical progression during the treatment of central nervous system tuberculosis is discussed. A few cases with this phenomenon were reported in the past, and the authors have treated four such cases. During the treatment for tuberculous meningitis, the four patients developed new lesions, mainly in the form of tuberculomas, which progressed for some time and later regressed. In all these cases the initial drug regimen was not changed, except for the addition of steroids for a short period at the time of deterioration. All four patients underwent ventriculoperitoneal shunt insertion during the course of treatment. The authors discuss the significance of the changes in the lesions and management of such cases, and review the literature.