The objectives of this study will be to quantify, using validated scales, the effects of 3D-printed models on shared decision-making and patient anxiety during the pre-operative consent and education process.

In this single-center pilot cluster randomized controlled trial, the investigators will prospectively measure patient-reported outcomes on shared decision-making and change in anxiety and knowledge. This study will consist of two arms with at least 20 patients each. Six surgeons will be randomly assigned using the opaque sealed envelope method to counsel patients using a modular 3D-printed model or providing standard care during pre-operative clinic visits. The eligibility criteria for the control and investigational arms will be standardized. The biostatistician will use Student t-tests to compare mean scores and ANCOVA to compare the change in mean scores after the pre-operative clinic visit.

Inclusion Criteria:

• Participants must be >18 years
• Patients scheduled for surgical intervention that would involve partial or complete resection of the colon and/or rectum

Exclusion Criteria:

• Patients requiring complex surgical reconstruction of organs other than the colon and/or rectum

Masking was not performed as it was not feasible