Abstract
Objective To study the lymphatic microvessel density of keloid and correlation of invasive growth.Methods Invasive part,proliferative part and peripheral normal skin of keloid patients (n=10) were collected by surgical excision,and normal skin of keloid and non-keloid patients as control.Lymphatic vessel density of different parts of keloid and normal skin were investigated by immunohistochemical staining using the lymphatic endothelium specific marker D2-40.Results There were no significant differences between lymphatic microvessel density of peripheral normal skin of keloid (12.563 ±1.803) n/mm2 and normal skin of non-keloid patients (11.071 ± 2.645) n/mm2 (t=1.389,P＞0.05); Lymphatic microvessel density of invasive part of keloid (27.315 ± 7.430) n/mm2 was significantly higher than those of proliferative part of keloid (17.375± 6.221) n/mm2 and normal skin (12.563±1.803) n/mm2 (x2 =16.8,P＜0.01); there were significant differences between proliferative parts of keloid and normal skin (t=2.276,P＜0.05).Conclusions Lymphatic microvessel density increase in the invasive part of keloid may have a certain relationship with invasive growth. Key words: Keloid; Lymphatic vesseis; Neoplasm invasiveness
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