Digestive System
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With his age, cholesterol:HDL ratio and the BMI the QRISK score is >10% therefore statins are indicated in his case.

Abdominal US is indicated in all cases of abnormal liver blood test.  If proved to have MASLD (Fatty liver on the US) then should be screened for Hb1Ac for type 2 diabetes.

Lifestyle modification is the most important treatment in his case.

Even though doing a FibroScan is never bad practice (it is non invasive and very helpful to estimate the level of liver fibrosis) the fact is that FibroScan would be strictly indicated IF the FIb4-score was > 2 (remember the cutoff in >65 yo is 2 instead of 1.3).

Check the guidelines

Synthetic liver function test include Albumin and clotting.
High bilirubin is part of the definition of liver impaired function

ALT is a marker of liver damage or insult, but does not relate to how well the liver is functioning.

Methotrexate, same as Azathioprine or Mercaptopurine, is NOT recommended for inducing remission , but to maintain remission. It can take up to 12 weeks to work However, these immunomodulators should be started earlier when patient is responding to first line treatment, in order to maintain remission and prevent flareups,  especially those with extensive disease or other poor prognostic features (early age at diagnosis, penetrating or stricturing disease, neeed for steroid, high CRP, smoker) should be considered for early introduction of biological therapy (dual biologic plus immunomodulator)

Active Crohn’s first line of treatment is an 8-week course of systemic corticosteroids to induce remission. Budesonide can be used  in mild-moderate case of ileal crohns, but should be escalated to systemic treatment if patient does not response.

Exclusive Enteral Nutrition (EEN) may be used to induce remission in mild to moderate Crohn’s disease patients where avoidance of corticosteroid is desired, and in those who are motivated to adhere strictly to EEN for up to 8 weeks. As this is a young male, this could be a possibility that may be worth exploring with paediatricians , dietitian and surgical team involvement. Howwever the fact that CRP is so high makes this case not  the ideal  candidate as he is already presenting systemic inflammation and there should be a good window of time needed  for this diet to work.

See BSG IBD guidelines 

If patient had HGD / Adenoca on a Barrett´s oesophagus, then the lesion is removed or ablated and afterwards the Barretts is fully ablated, we should perform regular gastroscopies for surveillance after Barretts eradication- yearly for 5 years and then at year 7 and 10-  Check the guidelines

If the reason for the ablation was only low grade dysplasia, then the surveillance can be 1,3 and 5 years and than surveillance can be stopped.

The proportion of AST to ALT in hepatocytes is about 2.5:1, but because AST is removed from serum by the liver sinusoidal cells twice as quickly (serum half-life t1/2 = 18 hr) compared to ALT (t1/2 = 36 hr), so the resulting serum levels of AST and ALT are about equal in healthy individuals, resulting in a normal AST/ALT ratio around 1. See here.

B6 is more essencial for ALT synthesis than AST, that is why in chronic alcohol (low B6) we will see a reduction of ALT in proportion to AST, increasing the AST/ALT ratio>2