New York - "And it's a big one," Dr Heemer Globin, Emeritus Professor of Experimental Lobotomy - er...Phlebotomy! - at New York's Seedy Sign-I Clinic said today as images of the pesky clot went viral in the blogosphere.
The Manhattan blood-thinning specialist is a pioneer of cutting edge leech technologies designed to draw out 'massive clots' into the open before any long term damage can be done.
Last year he famously fished out a 'pathetic' two inch clot imbedded in a famous Hollywood starlet's private crevice which had fiercely resisted all previous attempts to dislodge.
"Including a writ of Habeus Corpus [a Latin phrase meaning 'I Have A Corpse'] and a pair of surgical grappling irons."
His latest success in dealing with Hillary Clinton's thrombus owes much to skills honed during the 1970s as a trainee zitologist in London's Royal Freak Hospital.
Grateful former patients include the Queen Mother and Elizabeth Taylor, both of whom juggled with 'huge clots' during their lives.
His current famous charge is expected to remain under observation at Dr Globin's New York clinic until her successor as Secretary of State - rumored to be Sen John Kerry - is formally appointed.
Chelsea Clinton's third round of IVF treatment is pencilled in for 20 January.