This is a benign tumour composed of proliferating hepatocytes . It typically affects young women on the oral contraceptive pill or may be li...
• Typically 8-10 cm in size, hyperechoic lesion (may mimic haemangioma).
• 80% solitary, right lobe.
• Central areas of low echogenicity caused by haemorrhage or necrosis.
• Check for subcapsular/intraperitoneal haematoma.
• Hypodense.
• Transient arterial enhancement, isodense by portal venous phase.
• There may be mixed enhancement with hypodense patches due to necrosis and degeneration (as they outgrow vascular supply).
• Check for subcapsular or intraperitoneal haematoma.
• High T1 (most other lesions are low T1) due to glycogen, fat and haemorrhage
• Isointense on in-phase T1, loses signal on out-of-phase images
• Isointense on T2
• Immediate and intense enhancement with rapid washout
• Reduced tracer uptake on technetium-99m-labelled sulphur colloid scan (due to non-functioning Kupffer cells)
• Large peripheral arteries feeding into the tumour mass
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