Cystic Lymphatic Malformation with Lymphedema Treated by Lymphaticovenular Anastomosis Combined with Ethanol Sclerotherapy.

The incidence of cystic lymphatic malformation (CL) in an extremity is very rare. CL can be a cause of lymphedema in a lower limb. The most effective treatment for CL is sclerotherapy or excision; however, these treatments have the potential to cause fibrosis and obliteration of ruptured lymphatic vessels, which impairs lymphatic drainage and increases the risk of lymphedema. Lymphaticovenular anastomosis (LVA) combined with sclerotherapy may be a minimally invasive treatment option for CL in a lower limb. In this report, we describe a patient with CL complicated by lymphedema in a lower extremity, who we treated using LVA and ethanol sclerotherapy with satisfactory results. The patient was a 60-year-old man with a CL measuring 16 cm in diameter in the thigh region above the knee with lower limb lymphedema. The percentage of excess volume of the affected lower leg was 24.7%, preoperatively. Combined treatment using LVA with sclerotherapy was performed under general anesthesia. At 2 years after surgery, the reduction of excess volume of affected lower leg between preoperative and postoperative was 85.4%. In our previous report, the same combination therapy was used to treat CL and prevent lymphedema; however, in the present case, it was used to treat CL and lymphedema at one stage. LVA combined with sclerotherapy is a complementary minimally invasive treatment for CL accompanied by lymphedema.