Prospective Multicenter Registry Study to Assess the Frequency of Lynch Syndrome Among Patients With Colorectal Cancer

Provision of written informed consent;

Patients with histologically verified colon adenocarcinoma or patients with histologically verified synchronous neoplasms who have not previously received treatment for a second tumor;

Age ≥ 18 years;

Absence of antitumor treatment for a real tumor (it is allowed to include patients who have a history of antitumor treatment for other malignant tumors, if the period after treatment is more than 12 months).