Evidence mapPaperPMID 42221097Full record

ArticleFrontiers in medicine2026

Borderline liver enzyme patterns and their metabolic-inflammatory signatures: an observational outpatient study.

Erdoğan Özdemir, Turgay Yılmaz

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Article in Frontiers in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

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2 authors.

Erdoğan ÖzdemirDepartment of Internal Medicine, Elazığ Fethi Sekin City Hospital, Elazığ, Türkiye.
Turgay YılmazDepartment of Internal Medicine, Elazığ Fethi Sekin City Hospital, Elazığ, Türkiye.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background and aim: Liver enzyme elevations between one and two times the upper limit of normal (ULN) are common in outpatient practice and often dismissed as clinically insignificant, yet whether this range harbours meaningful subphenotypes, and whether the hepatocellular-cholestatic distinction applies at borderline levels, has not been systematically examined. We investigated whether, in adult outpatients with persistent borderline elevation confirmed using sex-specific ULN, the hepatocellular and cholestatic patterns carry distinct metabolic and inflammatory signatures. Materials and methods: This single-centre observational outpatient study was conducted at Elazığ Fethi Sekin City Hospital between October 2024 and January 2026. Eight hundred adults with standardised fasting biochemistry and haematology panels at baseline and third-month follow-up were analysed. Liver enzymes were classified as normal, borderline, or overtly elevated by the maximum fold-increase above the sex-specific ULN; borderline cases were subcategorised as hepatocellular, cholestatic, or overlap. Clinical, biochemical, inflammatory, and iron parameters were compared, and independent associations were examined using multivariable logistic regression. Results: Enzyme levels were normal in 548 patients (68.5%), borderline in 211 (26.4%), and overtly elevated in 41 (5.1%). Among the 211 borderline patients, 105 (49.8%) exhibited a hepatocellular pattern, 77 (36.5%) a cholestatic pattern, and 29 (13.7%) an overlap pattern. The hepatocellular pattern was associated with higher ferritin, serum iron, and transferrin saturation (TSAT), and a lower AST/ALT ratio; in multivariable analysis, ferritin was the only independent correlate (OR = 1.523; 95% CI: 1.199-1.935; Conclusion: Persistent borderline liver enzyme elevation can be stratified into biochemically distinct subphenotypes when sex-specific reference ranges are applied. The cholestatic pattern is predominantly associated with glycaemic burden, systemic inflammation, and reduced iron transport, whereas the hepatocellular pattern shows an iron-predominant signature. A pattern-based approach may carry clinical value in outpatient management; findings from full models with limited events-per-variable, particularly for SII, are hypothesis-generating and require longitudinal validation.

Indexed as

borderline liver enzyme elevationcholestatic patternhepatocellular patternMASLDmetabolic hyperferritinaemiasex-specific ULNsystemic immune-inflammation index

Identifiers

PMID42221097
PMCPMC13218902

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.