reoperation       
noun [ C or U ] (also re-operation) /riːˌɒp.ərˈeɪ.ʃən/ us/ˌriː.ɑː.pəˈreɪ.ʃən/
 再次手术
an occasion when a doctor carries out a particular medical operation for a second time on the same patient 
  She recovered completely after the reoperation. 再次手术后,她完全康复了。 
 There was a problem following the surgery that required re-operation.
  - More examples
 - Reoperations are generally not as successful as the original operation.
 - Two patients required a re-operation due to complications after the surgery.
 - Sometimes more than one tumour is present and reoperation may be necessary.