blood clot in a superficial vein
... that even a "benign" blood clot in a superficial vein can lead to serious complications?
... that even a "benign" <b id="mwBsw"><a href="./Superficial_vein_thrombosis" id="mwBs0" rel="mw:WikiLink" title="Superficial vein thrombosis">blood clot in a superficial vein</a></b> can lead to serious complications?