Amyloid A in Serum and Ascetic Fluid as a Marker of Spontaneous Bacterial Peritonitis
Authors: Mohamed Essam Bayoumy , Kader El-Nakeep Sarah Abdel , Ghandour Ahmed Mohamed El , Daif Adnan Mohamed Nagy Abdel Moneim 
Published: August 2023

Abstract

Background
Esophageal varices (EV) are a major complication of cirrhosis secondary to the development of clinically significant portal hypertension EV can lead to life-threatening bleeding, further decompensation and death among patients with cirrhosis.

Aim of the Work
The aim of this study is to assess the role of the clinical usefulness of the Amyloid A (serum and ascetic fluid) in patients with ascites (liver cirrhosis) and as a diagnostic marker for Spontaneous Bacterial Peritonitis.

Patients and Methods
This prospective study was conducted on 240 cirrhotic patients selected randomly presented for screening for esophageal varices at Hepatology, Gastroenterology and Infectious Diseases Department, Benha University Hospital Hospitals and at Kafr El- Shiekh Liver Research center

Results
The cause of cirrhosis was HCV in 205 patients (85.42%), HBV in 14 patients (5.83%), BHF in 47 patients (19.58%) with, AIH in 6 patients (2.5%) and other diseases in 21 patients (8.75%). the prevalence of oesophageal varices and its staging were 55 patients (22.9%) had no oesophageal varices, 44 patients (18.3%) had esophageal varices grade I-II (Small EVs) and 141 patients (58.8%) had oesophageal varices grade III-IV (Large EVs). According to Child-Pugh (CP) Score, 129 (53.75%) patients were Child A, 72 (30%) patients were Child B and 39 (22.9%) patients were Child C. ALBI ranged from -3.2 - (-0.42) with mean value −1.94 ± - 0.74. 67 (27.9%) patients were ALBI 1, 100 (41.7%) patients were ALBI 2 and 73 (30.4%) patients were ALBI 3. 50 (20.83%) patients were ALBI-PLT 2, 30 (12.5%) patients were ALBI-PLT 3, 88 (36.67%) patients were ALBI-PLT 4, 72 (30.0%) patients were ALBI-PLT 5. There was a significant difference among cirrhotic patients regarding EVs as regard to hemoglobin, platelets, APRI, albumin, total bilirubin, ALBI, ALBI-PLT, INR, Child-Pugh (CP) score, platelet count/spleen diameter ratio, spleen size and ascites (P &lt; 0.001). Regarding the presence of EV, ALBI, ALBI-PLT, Child-Pugh (CP) Score and platelet count/spleen diameter ratio, are good predictors for the presence of oesophageal varices. ALBI at cut-off &gt;-2.6 can predict oesophageal varices with sensitivity 83.77, specificity 53.06, PPV 87.4, NPV 45.6, AUC 0.711 and P-value &lt;0.001, ALBI- PLT at cut-off &gt;2 can predict oesophageal varices with sensitivity 96.48, specificity 87.76, PPV 96.9, NPV 97.7, AUC 0.982 and P-value &lt;0.001. Regarding differentiation between Small EVs and large EVs, This study showed that ALBI, ALBI-PLT, Child-Pugh (CP) Scores, platelet count/spleen diameter ratio, spleen size and APRI could be used in prediction of the size of EVs, ALBI at cut-off &gt;-2.03 can predict the size with sensitivity 95.28, specificity 93.75, PPV 96.8, NPV 90.9, AUC 0.971 and Pvalue &lt;0.001.

Conclusion
Combined ALBI grade and platelet count (ALBI-PLT score), albumin-bilirubin ratio (ALBI), could be used as a serum non-invasive marker of the presence of oesophageal varices which may help in reducing unnecessary endoscopies and a good selection of patients who need an endoscopy to decrease intervention and burden on endoscopy units.