Of the 5 anti-AQP1-positive MS patients (no. 18–22 in Table 1), the first two (no. 18 and 19) also had predominant spinal cord lesions (though not LETM) and most (92–100%) of their anti-AQP1 antibodies bound to intact AQP1-expressing HEK293 cells. This evidence concerns the gene AQP1 and myeloid sarcoma.