Congenital Hepatic Fibrosis Complicated with Polycystic Kidney Disease and Extensive Portomesenteric Venous Thrombosis: A Case Report and Literature ReviewAuthors: Liu, Dandan ¹*; Xu, Gang ¹; Li, Xinglan ¹; Tang, Baijie ¹¹ University of Electronic Science and Technology of China Sichuan Provincial People’s Hospital*Corresponding author: Liu, Dandan, E-mail: hb_ldd@qq.com;ORCID: 0009-0003-3803-8645Key Clinical Message: Adults with portal hypertension and renal cysts, even with a history of alcohol use, should be evaluated for congenital hepatic fibrosis; pathological re‑evaluation helps correct misdiagnosis, and prompt anticoagulation is critical for thrombotic complications.IntroductionCongenital hepatic fibrosis (CHF) is a rare autosomal recessive fibrocystic liver disease caused by ductal plate malformation, often associated with ciliopathy‑related disorders such as polycystic kidney disease (PKD) and Caroli’s disease [1]. Adult‑onset CHF is prone to misdiagnosis due to atypical clinical manifestations and confounding factors such as alcohol consumption or viral hepatitis [2]. Its core clinical feature is portal hypertension, with symptoms overlapping those of alcoholic or viral cirrhosis [3]. The main complications of CHF are cholangitis and portal hypertension [4], whereas extensive portomesenteric venous thrombosis is extremely rare and rarely reported.We present an adult case of CHF misdiagnosed as alcoholic cirrhosis for nearly 6 years, complicated with PKD, Caroli’s disease, and extensive portomesenteric venous thrombosis, aiming to highlight diagnostic clues, avoid clinical anchoring bias [5], and provide a reference for the clinical management of such rare cases.Case History and ExaminationA 38‑year‑old male with a 10‑year history of alcohol consumption (50 g ethanol per occasion, 2–3 times weekly) and a 10‑year history of untreated gouty arthritis was admitted to our hospital five times. There was no family history of hereditary hepatorenal diseases.Initial Admission and Subsequent Treatment in 2020In July 2020, he was admitted with hematemesis and melena for 14 days, accompanied by dizziness, fatigue, and orthostatic hypotension. Physical examination revealed pale conjunctiva and skin, and splenomegaly (3 cm below the left costal margin). Laboratory tests showed anemia, thrombocytopenia, cholestatic liver dysfunction, elevated tumor markers, and elevated D‑dimer. Gastroscopy showed severe esophagogastric fundal varices. Abdominal contrast‑enhanced CT suggested liver cirrhosis, splenomegaly, mild intrahepatic bile duct dilatation, and bilateral renal cysts.He was diagnosed with acute upper gastrointestinal bleeding and decompensated alcoholic cirrhosis (Child–Pugh class A). Emergency endoscopic variceal ligation plus tissue adhesive injection was performed, and bleeding was controlled. Due to recurrent mild hematemesis, a second endoscopic variceal ligation (August 2020) and a third endoscopic sclerotherapy (March 2021) were performed, with no further bleeding thereafter.Admission and Surgery in 2024In January 2024, he was admitted with recurrent abdominal distension and aggravated splenomegaly, with persistent thrombocytopenia and leukopenia suggesting hypersplenism. He underwent splenectomy + portaazygos devascularization + liver biopsy. Intraoperative findings showed mild hepatic surface nodularity (without typical cirrhotic nodules) and mild intrahepatic bile duct dilatation. The initial pathological diagnosis of the liver biopsy was nodular cirrhosis. Postoperative recovery was uneventful, and he remained asymptomatic during 2 years of follow‑up.Admission and Examinations in 2026In January 2026, he presented with persistent dull upper abdominal pain (worse after meals), nausea, and anorexia. Three days before admission, he developed paroxysmal colic, abdominal distension, and constipation. Physical examination showed low‑grade fever, tachycardia, and tenderness, rebound tenderness, and guarding in the upper abdomen and periumbilical region.Laboratory tests revealed leukocytosis, hypokalemia, aggravated cholestatic liver dysfunction, elevated inflammatory markers, tumor markers, and D‑dimer. Serological tests for viral hepatitis and autoimmune liver disease were negative. Abdominal MRI + MRCP and CTA showed heterogeneous hepatic parenchyma, cystic dilatation of the intrahepatic bile ducts (Figure 1), extensive thrombosis of the main portal vein (Figure 2) and superior mesenteric vein (Figure 3) with cavernous transformation, and diffuse bilateral renal cysts of varying sizes (Figure 4).Differential Diagnosis, Investigations and TreatmentPathological Re‑evaluationTwo senior pathologists retrospectively re‑evaluated the 2024 liver biopsy specimen with HE, Masson, and immunohistochemical staining. Findings included:No pathological evidence of alcoholic liver disease (no steatosis, ballooning degeneration, Mallory bodies, or perisinusoidal fibrosis) [3]; Severe periportal fibrosis with chronic inflammatory cell infiltration, forming broad and loose fibrous septa, without typical cirrhotic nodules; Marked irregular proliferation of small bile ducts in the portal tracts, focal cholestasis, cystic dilatation of large bile ducts, and shedding of biliary epithelium into the lumen (Figure 5); Proliferating bile ducts were positive for CK7 and CK19.Masson staining confirmed obvious periportal fibrosis with broad fibrous septa around the portal tracts (Figure 6).Differential DiagnosisAlcoholic cirrhosis: Excluded due to absence of steatosis, Mallory bodies, perisinusoidal fibrosis, and the presence of ductal plate malformation, the core feature of CHF [3].Idiopathic noncirrhotic portal hypertension: Excluded due to lack of portal vein abnormalities or nodular regenerative hyperplasia, and presence of bile duct proliferation [6].Autoimmune cholangitis: Excluded due to negative autoantibodies and absence of inflammatory bile duct injury or ductal plate malformation [7].Polycystic liver disease: Excluded due to presence of periportal fibrosis and portal hypertension, which are absent in this disease [8].Final DiagnosisCongenital hepatic fibrosis complicated with Caroli’s disease, polycystic kidney disease, and extensive portomesenteric venous thrombosis.TreatmentThe patient received anticoagulation therapy (low‑molecular‑weight heparin followed by long‑term rivaroxaban), combined with anti‑infection, electrolyte correction, hepatoprotection, and nutritional support. This anticoagulation regimen was selected based on evidence for portal vein thrombosis after splenectomy [9].Conclusion and ResultsAfter anticoagulation and supportive treatment, the patient’s acute abdominal pain, distension, and constipation completely resolved. Inflammatory markers normalized, liver function improved, and vital signs were stable. He was discharged in a stable condition.After discharge, the patient was advised to receive long‑term standardized anticoagulation and regular follow‑up (liver and renal function, coagulation function, abdominal imaging). At the latest follow‑up, the patient had no recurrent abdominal pain, bleeding, or thrombotic events, with significantly improved quality of life and no progressive hepatic or renal impairment.DiscussionCHF is a rare fibrocystic liver disease caused by ductal plate malformation, mostly related to PKHD1 gene mutations [10], and often comorbid with Caroli’s disease and PKD [1]. To our knowledge, this is the first reported case in China of adult CHF with extensive portomesenteric venous thrombosis, enriching the clinical spectrum of the disease.Diagnostic Clues and Causes of MisdiagnosisThe long‑term alcohol history and initial variceal bleeding led to a 6‑year misdiagnosis of alcoholic cirrhosis, reflecting clinical anchoring bias [5]. Overlooked diagnostic clues for CHF included: bilateral renal cysts at first admission progressing to typical PKD [1]; persistent cholestatic liver dysfunction without significant elevation of transaminases or bilirubin; mild hepatic nodularity without typical cirrhotic nodules during surgery; and no pathological evidence of alcoholic liver disease on biopsy [3].This highlights that CHF should be considered in adults with portal hypertension and renal cysts, even with a history of alcohol use [1].Significance of Pathological DiagnosisPathological examination is the gold standard for CHF diagnosis, with classic features of ductal plate malformation and periportal fibrosis without typical cirrhotic nodules [4]. Retrospective pathological re‑evaluation of the liver biopsy was critical in correcting the misdiagnosis. Cystic dilatation of the intrahepatic bile ducts confirmed the CHF–Caroli complex, which results from persistent embryonic ductal plate malformation [4].In resource‑limited settings, comprehensive clinical, imaging, and pathological evaluation is a practical approach for diagnosing rare CHF [10].Thrombotic Complications: Risk Factors and ManagementExtensive portomesenteric venous thrombosis in this case was associated with multiple risk factors: hemodynamic abnormalities caused by long‑standing portal hypertension (slow venous flow, cavernous transformation) [11]; hypercoagulable state after splenectomy (elevated platelets) [9]; mechanical compression of the portal and mesenteric veins by enlarged polycystic kidneys [1]; and systemic inflammation activating the coagulation cascade.Timely anticoagulation achieved a satisfactory outcome, indicating that high vigilance for thrombotic complications and prompt anticoagulation are essential in CHF patients.Clinical Management and PrognosisNo curative treatment exists for CHF; management focuses on controlling complications [1,3]: endoscopic or surgical intervention for portal hypertension, antibiotics for cholangitis [11], supportive care for PKD‑related renal insufficiency, and anticoagulation for thrombotic complications [9].Liver transplantation is the only curative option for end‑stage CHF (refractory portal hypertension, liver failure) [12], and combined liver‑kidney transplantation is indicated for concurrent end‑stage renal disease [13]. Adult‑onset CHF generally progresses slowly, and early intervention for complications improves long‑term prognosis [14].Molecular genetic testing was not performed in this case due to financial constraints. In resource‑limited settings, comprehensive clinical, imaging, and pathological evaluation remains a practical diagnostic strategy for CHF [10].Patient PerspectiveThe 6‑year misdiagnosis caused recurrent symptoms, multiple endoscopic and surgical procedures, and heavy physical and economic burdens, with significant anxiety for the patient and his family. After definitive diagnosis and targeted treatment, his symptoms were completely relieved and quality of life greatly improved.The patient fully understands the chronic and hereditary nature of the disease, adheres to long‑term treatment and follow‑up, and is willing to share his experience to raise awareness of this rare disease and provide a reference for clinicians and other patients.Author contributions: Liu, Dandan (corresponding author) conceived the study, drafted and revised the manuscript; Xu, Gang collected and organized the patient’s clinical and imaging data; Li, Xinglan and Tang, Baijie performed retrospective pathological re‑evaluation of the liver biopsy specimen and provided professional pathological opinions; all authors reviewed and approved the final version of the manuscript.Conflict of interest: All authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Patient consent statement: Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.References1. Alsomali MI, Yearsley MM, Levin DM, et al. Diagnosis of congenital hepatic fibrosis in adulthood. Am J Clin Pathol. 2020;153(1):119–125.2. Chen IY, Whitney-Miller CL, Liao X. Congenital hepatic fibrosis and its mimics: a clinicopathologic study of 19 cases at a single institution. Diagn Pathol. 2021;16(1):81.3. European Association for the Study of the Liver. EASL Clinical Practice Guidelines: management of cholestatic liver diseases. J Hepatol. 2009;51(2):237–267.4. Hasbaoui BE, Rifai Z, Saghir S, et al. Congenital hepatic fibrosis: case report and review of literature. Pan Afr Med J. 2021;38:188.5. Croskerry P. Clinical cognition and diagnostic error: applications of a dual process model of reasoning. Adv Health Sci Educ Theory Pract. 2009;14(Suppl 1):27–35.6. Fiel MI, Schiano TD. Idiopathic noncirrhotic portal hypertension. Semin Diagn Pathol. 2019;36(6):395–403.7. Gleeson D, Bornand R, Brownlee A, et al. British Society of Gastroenterology guidelines for diagnosis and management of autoimmune hepatitis. Gut. 2025;74(9):1364–1409.8. Norcia LF, Watanabe EM, Hamamoto Filho PT, et al. Polycystic Liver Disease: Pathophysiology, Diagnosis and Treatment. Hepat Med. 2022;14:135–161.9. Lin YK, Cai XR, Hong HJ, et al. Risk factors of portal vein system thrombosis after splenectomy: a meta-analysis. ANZ J Surg. 2023;93(12):2806–2819.10. Liu Y, Zhu P, Tian J. Case report: Rare genetic liver disease – a case of congenital hepatic fibrosis in adults with autosomal dominant polycystic kidney disease. Front Med. 2024;11:1344151.11. Zohud A, Akram M, Khamaise Y, et al. Splenic artery embolization in a patient with advanced Caroli’s syndrome complicated with portal hypertension: a case report. J Med Case Rep. 2025;19(1):536.12. Wu WK, Ziogas IA, Izzy M, et al. Liver transplantation for congenital hepatic fibrosis. Transpl Int. 2021;34(7):1281–1292.13. Khan K, Agostini T, Desale S, et al. Improved patient and graft survival from kidney transplantation in liver transplants for congenital hepatic fibrosis and Caroli’s disease. J Hepatol. 2020;73:S267–S268.14. Shorbagi A, Bayraktar Y. Experience of a single center with congenital hepatic fibrosis: a review of the literature. World J Gastroenterol. 2010;16(6):683–690.ImagesFigure 1. Abdominal imaging showing cystic dilatation of intrahepatic bile ducts (black arrow).Figure 2. Abdominal imaging showing thrombosis in the main portal vein (black arrow).Figure 3. Abdominal imaging demonstrating thrombosis in the superior mesenteric vein (black arrow).Figure 4. Abdominal imaging showing multiple cysts in bilateral kidneys (black arrow).Figure 5. Liver biopsy (HE staining, ×100) showing ductal plate malformation, cystic dilatation of intrahepatic bile ducts, and partial shedding of epithelium into the lumen (black arrows).Figure 6. Liver biopsy (Masson staining, ×100) showing broad fibrous septa around the portal tracts (blue staining).