Congenital nevus - 先天性痣
鼻子上的大痣如果在新生兒期不去除，很難完全去除。
由於其形狀不規則，因此需要進行活檢。
References
Congenital melanocytic nevus 是一種在出生時或嬰兒期形成的胎記。 Nevus sebaceous 是一種涉及毛囊缺陷的皮膚異常。在這項研究中，我們使用一種稱為針孔法的雷射技術和 Erbium: YAG 雷射來治療不同患者的痣病變。
Congenital melanocytic nevus (CMN) is a melanocytic nevus that is either present at birth or appears during the latter stages of infancy. Nevus sebaceous has been described as the hamartomatous locus of an embryologically defective pilosebaceous unit. Here, we describe how we used the pinhole technique with an erbium-doped yttrium aluminium garnet (erbium : YAG) laser to treat nevi lesions in different patients.
Congenital melanocytic nevus (CMN) is a melanocytic nevus that is either present at birth or appears during the latter stages of infancy. Nevus sebaceous has been described as the hamartomatous locus of an embryologically defective pilosebaceous unit. Here, we describe how we used the pinhole technique with an erbium-doped yttrium aluminium garnet (erbium : YAG) laser to treat nevi lesions in different patients.
Giant congenital melanocytic nevus 是一種皮膚黑斑，從出生就存在，長大後寬度會超過 20 公分。這種情況非常罕見，每 20,000 名新生兒中發生率不到 1 人。儘管這種情況很少見，但它很重要，因為它可能導致皮膚癌等嚴重問題或影響大腦和神經（神經皮膚黑變病）。一生中罹患皮膚癌的幾率為 5% 至 10%。
Giant congenital melanocytic nevus is usually defined as a melanocytic lesion present at birth that will reach a diameter ≥ 20 cm in adulthood. Its incidence is estimated in <1:20,000 newborns. Despite its rarity, this lesion is important because it may associate with severe complications such as malignant melanoma, affect the central nervous system (neurocutaneous melanosis). The estimated lifetime risk of developing melanoma varies from 5 to 10%.
Giant congenital melanocytic nevus is usually defined as a melanocytic lesion present at birth that will reach a diameter ≥ 20 cm in adulthood. Its incidence is estimated in <1:20,000 newborns. Despite its rarity, this lesion is important because it may associate with severe complications such as malignant melanoma, affect the central nervous system (neurocutaneous melanosis). The estimated lifetime risk of developing melanoma varies from 5 to 10%.
與黑色素細胞痣相比，先天性黑色素細胞痣的直徑通常較大，並且可能有多餘的毛髮。如果超過 40 公分（16 吋）且患有多毛症，有時稱為巨毛痣。
隨著孩子的成熟，黑色素細胞痣通常與身體大小成比例地生長。突出的毛髮經常形成，尤其是在青春期之後。
手術切除是標準護理。為了美觀，許多都透過手術切除。但是，為了預防癌症，較大的腫瘤會被切除。巨大的先天性痣惡性化為黑色素瘤的風險較高。文獻中轉化為黑色素瘤的估計為 2-42%。
當病灶較小時，可以手術切除。但是，隨著年齡的增長，疤痕變大，想要完全去除而不留下疤痕是非常困難的。
○ 治療
#Staged excision (congenital nevus)