Overview
Focal nodular hyperplasia (FNH) is a benign liver lesion characterized by hyperplastic regenerative nodules, often associated with an anomalous blood vessel. It typically presents as a solitary mass without malignant potential 1.Diagnosis
Imaging Findings: Characteristic appearance on imaging, often with a central scar on CT or MRI 1.
Radiological Assessment: Contrast-enhanced CT and MRI are crucial for diagnosis, showing typical enhancement patterns 1.
Nuclear Medicine: Technetium-99m sulfur colloid scan may show increased uptake due to the presence of Kupffer cells 1.
Histological Confirmation: Definitive diagnosis requires histopathological examination showing typical histological features 1.Management
Surgical Intervention: Major surgery is seldom indicated due to the benign nature of FNH 1.
Monitoring: Regular imaging follow-up is recommended for asymptomatic lesions to monitor stability 1.
Resection: Reserved for symptomatic cases, complications, or diagnostic uncertainty 1.Special Populations
Pregnancy: No specific management guidelines provided in the abstract; monitoring is likely recommended 1.
Pediatrics: No distinct management differences noted; general principles apply 1.
Elderly: Management parallels that of younger adults, focusing on conservative approaches unless complications arise 1.
Comorbidities: Management considerations are similar, with surgical intervention avoided unless absolutely necessary 1.Key Recommendations
Benign Lesion Management: FNH should be managed conservatively unless symptomatic or complications arise (Evidence: Expert opinion 1).
Imaging Follow-Up: Asymptomatic FNH patients should undergo regular imaging to monitor lesion stability (Evidence: Expert opinion 1).
Avoid Unnecessary Surgery: Major surgical intervention is generally not indicated for FNH due to its benign nature (Evidence: Expert opinion 1).References
1 Santavirta S, Ahonen J, Nickels J, Tötterman S, Liewendahl K. Focal nodular hyperplasia of the liver: Report of a case. Acta chirurgica Scandinavica 1981. link