SDHB and neoplasm: Immunohistochemistry showed:(Abdominal cavity stromal tumor + left half colon) Tumor cells CD117(+), CD34(-), DOG-1(-), S-100(-), SMA(+), Ki67 (approximately 20%),SDHA(partial+), SDHB(+);(Tumor nodule anterior to left kidney) Tumor cells CD117(+), CD34(-), DOG-1(-), S-100(-), SMA(+), Ki67(approximately10%), SDHA(partial+), SDHB(+).