膽紅素一直高於正常值

本人55歲，女。這是我2013 年以來總膽紅素的數據（mg/dL）。2015 年8月由於膽結石切除膽囊。

5/2013	2/2014	6/2015	6/2016	7/2017	6/2019	6/2021	6/2022	7/2023	8/2024
1.4	1.8	1.5	1.2	1.3	1.1	1.0	1.6	1.1	1.5

今年8月總膽紅素達到 1.9， 直接膽紅素 是0.3， 間接是1.6。

上周家庭醫生為查明膽紅素高的原因，讓我做了腹部超聲波。結果如下：

LIVER: Normal in size. Normal echogenicity. No focal liver lesion identified. No intrahepatic ductal dilatation.

MAIN PORTAL VEIN: The portal vein is patent with antegrade flow.

GALLBLADDER: Surgically absent.

CBD: Normal measuring up to 9.1 mm. Please note that the distal CBD, in the region of the pancreatic head, is not adequately visualized.

PANCREAS: Evaluation of the pancreas is limited secondary to overlying bowel gas. Visualized portions of the pancreas are unremarkable without significant pancreatic ductal dilatation.

RIGHT KIDNEY: 11.3 cm in length. Normal contour and echogenicity. No hydronephrosis.

IMPRESSION:

Mild biliary ductal dilatation, potentially related to post cholecystectomy state. Given clinical history of jaundice and elevated bilirubin, consider follow-up MRI/MRCP to evaluate for an occult stricture, stone, or mass. 

我眼睛不黃，皮膚不黃，沒有jaundice 症狀。除了HDL(56)有點低， LDL(120)和 A1C(5.8)有點高以外，其他檢查結果都正常。 自我感覺良好，身體沒有任何不適。請問膽紅素高是什麽引起的呢？有必要去做MRI 嗎？