Head and Neck Tumor (IMAGE) Mass Eye and Ear Caption A head and neck tumor (squamous cell carcinoma) stained for markers of cancer (p63; brown) and partial epithelial-to-mesenchymal transition (LAMB3; red) demonstrates cells having undergone a unique transition at the tumor's outer edge. New research suggests that this transition may be responsible for cancer spread and metastasis to lymph nodes. Credit Massachusetts Eye and Ear Usage Restrictions Please credit Massachusetts Eye and Ear. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.