He had a minor operation to remove a cyst.

他做了一个切除了囊肿的小手术。

《柯林斯英汉双解大词典》

Tomorrow I've to go into hospital-Just a minor operation.

明天我要去住院——只是动个小手术。

youdao

Tomorrow I have to go into hospital - just a minor operation.

明天我要去住院——只是动个小手术。

youdao

He accepted the award in a wheelchair after a minor operation became major ankle surgery.

VOA: special.2010.06.02

The new device is inserted during a relatively minor operation and patients are out of hospital the same day.

BBC: Enlarged prostate device trialled by NHS

However, a few days later it emerged that Owen had indeed had a second minor operation, tightening the screw they inserted during the original procedure.

BBC: WHEN THE INJURIES HAPPENED

However, although this is significant when assessed in the light of a very minor operation, the extra risk is very small in comparison to the higher overall risk of major surgery like a heart bypass.

BBC: Heart bypass - with local anaesthetic