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Retrospective study on the outcomes of infantile tufted angioma complicated by Kasabach-Merritt Phenomenon.

OBJECTIVE: To analyze the clinical characteristics and treatment of pediatric tufted angiomas(TA)complicated by Kasabach-Merritt Phenomenon (KMP).

METHOD: A retrospective analysis was conducted on the clinical data and follow-up data of 13 patients diagnosed with TA complicated by KMP. Five male and 8 female patients with an average age of 5.7 months (range, 29 days to 1 year) were treated with surgery between January 2009 and June 2012. According to the size and location of lesions and the degree of thrombocytopenia, complete or subtotal resection was performed. The median follow-up period was 3.4 years (range, 1.7 years to 5.2 years). Therapeutic outcomes were evaluated by platelet count and lesion size.

RESULTS: Curative treatment of KMP is defined as restoration of normal hemostasis and elimination of tumor cells. Twelve patients achieved curative treatment and one died of multiple organ failure after operation. Ten patients received complete resection and three patients received incomplete resection. Thrombocyte count, hemoglobin and blood coagulation were respectively restored to normal levels within 1-3 days and 1-2 weeks post complete resection operation. One of the three patients who received subtotal resection operation died. In the other two patients, the platelet count fluctuated over time but remained above 60 × 109 /L, a significantly higher level than the preoperational level. Residual lesions slowly disappeared after continuous medication 3-6 months post operation.

CONCLUSION: Early surgical treatment of patients with TA complicated with KMP resulted in significantly higher curative rate and reduced side-effects of drugs.

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