EXHIBIT 23.2 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 3, 1998 included in XOMA Ltd.'s Form 10-K for the year ended December 31, 1998, and to all references to our firm included in this Registration Statement. ARTHUR ANDERSEN LLP /s/ Arthur Andersen LLP San Francisco, California September 15, 1999