“…Although rare, HVS has been reported previously in patients with MM. [18][19][20][21][22][23][24][25][26][27][28][29][30][31] Because previous reports of HVS dated back > 50 years 18 and owing to its low incidence, the clinical characteristics of HVS remain largely unknown. A total of 19 additional cases of HVS in association with MM reported between 1967 and 2015 were identified.…”