ENT Case 6. Laryngeal mass from a middle-aged male patient.

PITFALL to avoid: this is not medullary carcinoma of thyroid.

Diagnosis: neurocrine tumor, grade 1 of larynx

NET from larynx is rare and often positive for TTF1 and calcitonin.

Calcitonin is not specific for medullary carcinoma of thyroid, and is expressed in NETs from multiple organs.