Dear Editor,The report on “Salivary Gland Scintigraphy in the Evaluation of Salivary Gland Dysfunction” is very interesting.[1] Senthilkumar and Sathasivasubramanian concluded that “there was a significant correlation between salivary flow rate and the scintigraphic uptake and excretory ratio.”[1] In fact, there is a previous similar report confirmed the good diagnostic protery of salivary gland scintigraphy.[2] Nevertheless, the false positive of the technique can be expected.[3] Salanci and Ergün noted that “bilateral radioactivity absence is observed usually due to drugs or radiopharmaceutical storage conditions.”[3] In case of existed salivary tumor, Yoshikai et al. noted that “adenoid cystic carcinomas and pleomorphic adenomas were the principal sources of false negative and false positive results, respectively.”[4]