Hydroxyurea-induced pneumonitis in a patient with chronic idiopathic myelofibrosis after prolonged drug exposure.

We describe a 63-yr-old patient diagnosed with chronic idiopathic myelofibrosis whose disease was treated with hydroxyurea for 2 yr. He developed respiratory symptoms that were extensively investigated including lung biopsy. Clinical, radiological and histological features were compatible with a diagnosis of hydroxyurea-induced pneumonitis.