The second smallest tumor in Case 4 was a microscopic tumor, measuring 0.2 cm from the left lobe, spread along the interfollicular fine connective tissues containing lymphatic and blood vessels and was diffusely, moderately positive for CT in the main tumor and was weakly stained in the adjacent in-situ tumor for CgA and SPY (Table 1, Figure. The gene discussed is CGA; the disease is neoplasm.