KIF5B-RET fusion gene is identified in a Chinese LAD patient. A. Expression of the KIF5B-RET fusion protein is shown in the positive tumor sample. Western blot analysis showed an approximately 108 kDa but not 170 kDa (the RET protein) band. B. Immunohistochemical analysis of KIF5B-RET expression in the positive tumor tissue. The tumor cells were arranged in solid nests and revealed moderate cytoplasmic expression of KIF5B-RET fusion protein.