11.   Medical errors include unnecessary operations, incorrect drug prescriptions, and, in extreme cases, surgery performed on the wrong parts of patients.

12.   Usually harmless and easily treated, plagiocephaly has led at worst to needless tests, unnecessary operations and big expenses, specialists say.

13.   Hashimoto pledged Friday to review the management of governmental financial institutions to trim unnecessary operations and fiscal investment in them.

14.   Chinese desperate to improve their English to boost their career prospects are turning to unnecessary operations on their tongues, a doctor said Tuesday.