Glad you didn't have to endure the biopsies. Have any of the doctors considered that the Remicade might be the culprit? Anti-TNF meds [Remicade, Humira, etc.] have been reported to cause some serious skin issues in some people. "The serious skin reactions presented mostly with rash and skin lesions on the trunk, limbs, shoulder, back, hands, and face. In some SJS cases, oral mucositis or ulceration, genital ulceration, and/or fever were also reported."
Full article: http://www.medscape.com/viewarticle/571633