The two positive cases for STRN/ALK fusion were identified in conventional PTC (Table S1) revealing that 2/16 of conventional PTC harbor a rearrangement between STRN and ALK. The fusion was not observed in PTC variant forms (13 cases), in follicular thyroid carcinomas (11 cases), in poorly differentiated carcinomas (5 cases), in oncocytic thyroid carcinomas (5 cases) or in benign lesions including follicular thyroid adenoma (10 cases) and oncocytic thyroid adenoma (15 cases). Here, ALK is linked to follicular thyroid adenoma.