Lymph nodes exposed to fungal antigens from the gastrointestinal tract and genitals provide the best environment for this chance event to occur—especially when these sites are colonized with Candida. CD4+ T cells which readily recognize fungal antigens should increase the probability of this chance event happening: such cells are associated with idiopathic uveitis (44), though no similar study could be found for MS. This evidence concerns the gene CD4 and myeloid sarcoma.