As a follow-up, a chest X-ray is usually performed 6 and 12 months after completion of therapy to assess the course or possible recurrence of pulmonary tuberculosis. In the case of resistant tuberculosis or difficulties during therapy, these checks are carried out for two years. In the case of extrapulmonary tuberculosis, different examination methods are used depending on the organ. If changes persist even after therapy (e.g. permanent changes in the lung tissue), or if new or recurring symptoms give cause for this, additional examinations can be carried out.