CMn

CMN is an acronym that can refer to several different terms across fields such as medicine, healthcare networks, and information technology. The most common medical usage is Congenital Melanocytic Nevus, a pigmented skin lesion present at birth.

Congenital Melanocytic Nevus (CMN) describes pigmented birthmarks that vary in size and can be solitary or multiple. Small CMN are under about 1.5 cm in diameter, medium CMN range from 1.5 to 20 cm, and large or giant CMN exceed 20 cm or cover large areas. The risk of malignant transformation in CMN is related to size and lesion characteristics, and in cases of giant CMN, there is also a potential risk of neurocutaneous melanosis. Management typically involves regular dermatologic monitoring; surgical excision or staged removal may be considered for cosmetic or cancer-risk reasons, while laser therapies can reduce pigmentation in selected cases. Families may require multidisciplinary care and genetic counseling where appropriate.

Outside medicine, CMN is used as an acronym for several institutions and networks. In Spanish-speaking healthcare systems, CMN commonly stands for Centro Médico Nacional, the National Medical Center, with major campuses such as CMN La Raza and CMN Siglo XXI in Mexico, among others. In other contexts, CMN may denote various organizations or technical concepts depending on the organization, and the precise meaning should be inferred from the surrounding context.