[Analysis of the pain in extremities caused by intramuscular venous malformation and surgical treatments].

Objective: To analyze the pain caused by intramuscular venous malformation, so as to avoid misdiagnosis.

Methods: We retrospectively analyzed 173 patients who received surgical treatments in our department between Jan.2012 to Dec.2014,with the main complaint of local pain and were diagnosed as intramuscular venous malformation. The mechanisms of the local pain, based on the image data, intra-operative findings, pathology reports and the comparison of the Visual Analogue Scale(VAS)data before and after operation were summarized. The surgical interventions included simple excision or excision + adhesiolysis or excision + adhesiolysis + nerve decompression.

Results: The reasons of local pain can be divided into 4 categories:①lesion located in the tendon insertions;②lesion involving the local nerve, inducing the thickening and tensing of its epineurium and the increasing of its diameter;③lesion infiltrated to the periosteum;④phlebolith in it. All the 173 patients received surgical treatments and got varying degrees of relieving from local pain.63 patients got a decrease of the VAS by 5 or more, and 95 cases' VAS number decreased by 3-4,the rest 15 patients' VAS cut down by 1-2.

Conclusions: Intramuscular venous malformation is an important reason for local pain and should not be neglected. Surgical treatment can be an effective method to remove the lesion and relieve local pain.