A government spokesman says President Cristina Fernandez will be operated on for papillary thyroid carcinoma on Jan. 4.
Spokesman Alfredo Scoccimarro says the carcinoma was detected during a routine medical exam on Dec. 22.
Scoccimarro said Tuesday that doctors confirmed that the cancer hadn't metastasized or affected her lymph nodes.
The 58-year-old Fernandez will be operated on in Buenos' Aires Hospital Austral on Jan. 4, 2012. She will rest and take time off from her duties until Jan. 24.