Clinicopathological analysis of aggressive angiomyxoma

Objective To explore the clinicopathological characteristics of aggressive angiomyxoma (AAM) so as to boost the level of diagnosis and treatment.Methods Seven cases of aggressive angiomyxoma were studied with light microscope and immunohistochemistry.Antibody of Vimentin,Desmin,CD34,smooth muscle actin ( SMA ),estrogen receptor (ER),progesterone receptor ( PR ),androgen receptor (AR),S-100,p53 and Ki67 were used.Results There were 3 males and 4 females with an average age of 43.1 years.Three patients had urinary compressive complaints while others were symptomfree.All underwent surgical resection. Three patients were recurrent after operation. The tumor was generally nodular and its cut surface appeared jelly-like.Histologically,on myxoid stroma background,it was composed of a mixture of spindle and stellar cells without atypical cell and mitosis.There were varioussized vessels with thin to thick walls.The scattered muscle-like cells had a perivascular distribution.Immunohistochemistry showed tha(t) tumor cells were positive for Vimentin( + )7/7,Desmin( + )7/7,CD34 ( + )3/7,SMA( + )2/7,ER( + )6/7,p53( + )4/7,Ki67( + ) 1％ -8％ and negative for PR,AR and S-100.Conclusions As a rare soft tissue tumor,AAM extremely rare in males.Owing to its local invasion and high recurrence,extensive resection and long-term follow-up are necessary. Key words: Angiomyxoma; Clinicopathology; Immunohistochemistry