Eighty four patients ( all but 2 followed up for 8 . 8 + / 5 . 7 years ) with ASP ( 57 with adrenal tumors , 27 with extra adrenal , multiple , malignant , or recurrent tumors ) were screened for the major susceptibility genes for phaeochromocytoma ( RET , VHL , SDHD , and SDHB ) . ^^^