Extensively Drug-Resistant Tuberculosis: Report and Literature Review on Two Cases Requiring Prolonged Treatment.

BACKGROUND Extensively drug-resistant tuberculosis (XDR-TB) is a global problem due to the high morbidity and mortality it causes. Peru is one of the countries with the highest numbers of cases of XDR-TB, which increase every year. CASE REPORT We present the case of two siblings who developed XDR-TB, underwent surgery twice, and were in individualized treatment for more than 6 years.