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US and CT are highly sensitive in the diagnosis of abdominal lymphangioma. Our limited experience with follow-up examinations in two patients suggests that progressive enlargement, multiplication and thickening of septa and increased echogenicity of the cystic fluid are signs indicating complications demanding urgent treatment.

The data demonstrate an excellent sensitivity (100%) of the FFS values in patients with uncomplicated fatty infiltration. This was also the only group of patients in whom the FFS score was superior to the radiologists' best score. The FFS method can be used as a tool to follow up the response to a clinical or research treatment and to obtain standardization of pattern interpretation independently of the individual reader.