MUC5AC and glioblastoma: The ability todetect MUC 3 in tear-like fluids suggests that tear samples from patientscould be screened for aberrant mucin signatures associated with glioblastoma.Such a diagnostic approach would be minimally invasive, relying onsimple tear collection (e.g., Schirmer strips) methods and optical analysis of a ThT-doped tear sample.