You know when you learn about a ‘new’ dis-ease driver and then you actually have to stop yourself from diagnosing every patient with it? I’ve done this dance with Gilbert’s Syndrome for over a decade, so too maybe have some of you? And while there have been many, many occasions when I’ve been certain it’s Gilbert’s (clear robust & reproducible patterns of high bilirubin without other explanation) there are other times when I’ve been left wondering, and with questions. Like – what about a fluctuating pattern – sometimes ‘within range’ sometimes above or at least high-normal – with no other explanation? What about the patient whose symptom-story is a perfect fit – prone to nausea, early satiety, gut issues, food reactions and anxiety all worse for increased oestrogen…but the total serum bilirubin is 14 micromoles/L? I mean, 14, right? that’s well below the top of that range, but remarkably higher than the majority of women of the same age, eating the same diet. And you ask yourself…could it…be??
The latest UU30 offering on Gilbert’s Syndrome constitutes a complete overhaul of everything we’ve previously been told about how to recognise and diagnose this polymorphism & it’s going to answer a lot of those ‘could it be’ questions we’ve all had! Known also as familial non-haemolytic jaundice and episodic hyperbilirubinaemia under stress – is everyone with Gilbert’s prone to jaundice? Uh, no. Total bilirubin levels typically have to get to 45 micromoles/L to evoke this effect – many of our GS patients won’t ever get there, some will with increased illness or other stress and may yellow a tad (like a fading bruise), while other patients of mine routinely have a bilirubin at this level but won’t experience jaundice unless they impair their UGT further via doing what they know they shouldn’t: extreme exercise or excess alcohol. The latest deep dive into GS diagnostics
But as much as we don’t want to miss this diagnosis we don’t want to mis-diagnose patients with it either!
Can you spot the difference? Don’t forget total serum bilirubin levels are the net result of haem catabolism – so you need to account for rate of blood production, destruction and of course rule out any biliary dx before you can take a guess at Gilbert’s. Oh and watch out for expected high bilirubin values in the fasting fan(atic)s!
For those people living with Gilbert Syndrome at last the research world & the real one are uniting – with greater detailed documentation of how this very common polymorphism presents and the mark it may make in their health story. However, given only 1/5 with Gilbert’s syndrome actually know they have this condition, who are we missing? This latest instalment rewrites our diagnostic criteria and corrects our past misunderstandings based on the very latest science, while shedding further light on what it’s like to live in Gilbert St.