Patients with MTC demonstrated significantly lower concentrations of Fascin compared to those with NET or adrenal neoplasms (p = 0.007 and p = 0.048, respectively), while the differences between NET patients and controls approached statistical significance (p = 0.076), suggesting a possible association of Fascin with the pathology of NET. Here, FSCN1 is linked to medullary thyroid gland carcinoma.