Unusual C- and A2-Window Peaks (Hemoglobin M-Saskatoon) in Three North Indian Patients
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We read with interest the report by Dass et al.  wherein they concluded that CE-HPLC-derived C-window peaks in north Indian patients only rarely represent HbC. In their findings, all four non-HbC C-window peaks were due to a hybrid HbQIndia + HbDPunjab, a finding also previously reported by us . We would now like to add three cases of HbM-Saskatoon, an unusual methemoglobinemic variant, to the differential diagnosis of variant hemoglobins that result in C-window peaks.
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The authors declare that they have no competing interests.
All procedures performed in this report involving a human participant were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This is a purely observational report and no research procedure was done.
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