Focal nodular hyperplasia with calcification and ossification

We describe a 33-year-old woman with Crohn's disease, who presented with re current episodes of small bowel obstruction. A solitary liver lesion was di scovered incidentally by abdominal ultrasound. Pathological examination of the resected specimen revealed features typical of focal nodular hyperplasi a together with uncommon findings including calcification, ossification and fibrous obliteration of blood-filled "cysts", changes more commonly associ ated with regression in hepatic haemangiomas. This report strengthens the f avoured hypothesis that a vascular malformation underlies the pathogenesis of focal nodular hyperplasia.