TULP1 and cancer: Figure 1E shows a magnification of the labeling of the inner segment (arrow) and outer limiting membrane. We tested eight randomly selected sera positive for TULP1 AAbs on the blot (Figure 2), including two from AIR patients without cancer (Figure 2A,B) and six from patients with different types of cancers (basal cell carcinoma, small cell lung cancer, breast cancer, renal cancer) (Figure 2C–H).