Solitary fibrous tumour of the falciform ligament containing multiple foci of malignant transformation.

Solitary fibrous tumour is an uncommon soft tissue tumour initially described in the pleural cavity. In the past decade, it has been described in various extrapleural sites, including the abdomen. Traditionally regarded as benign, cases of histologically or clinically malignant solitary fibrous tumours are rare. This report describes such a case, although the patient is still disease free five years after excisional surgery, without adjuvant treatment. The acute clinical presentation may be related to malignant transformation occurring in a long standing solitary fibrous tumour.