Argentine President Cristina Fernandez will be operated on for a cancerous tumour in the area of her thyroid gland next month, a government spokesman said on Tuesday.

The carcinoma has not metastasized, meaning it is has not spread, spokesman Alfredo Scoccimarro said at a news conference. The operation is scheduled to take place on January 4, he said.

If everything is as they said officially, she should not have any other problem. The sickness has not spread, said Buenos Aires-based oncologist Mario Bruno.

Fernandez, 58, won a second four-year term in October.

(Reporting By Hugh Bronstein; Editing by Todd Eastham)