This study will evaluate the impact of Short Message Service (SMS) on compliance with surveillance of patients with germ-cell tumors. Patients will be randomized in a 2:1 ratio to get 2 groups : (1) patients will receive reminder SMS before appointment detailing the date of consultation and exams to be performed before; (2) standard of care without SMS.

Inclusion Criteria:

• Patient with germ cell tumor.
• Patient with a mobile phone.
• Patient on surveillance.

Exclusion Criteria:

• Testicular cancer without germ cell component.
• Prior history of other malignancy except for: cutaneous cancers excluding melanoma, superficial bladder tumor, localized prostate cancer with undetectable PSA.
• Cognitive condition that would preclude patient's understanding and completion of study procedures.

235 patients, with 157 in the experimental arm, with SMS sending and 78 patients in the control arm, without sending SMS.