Very low urgency
--
Type of benign mole that appears at birth or in the first few weeks of life. It is more common in babies of Asian descent.
It is caused by an excess of pigment in one area, usually the buttocks or lower back.
They are flat patches of blue or greyish blue with irregular edges, measuring between 4-12cm in diameter. In exceptional cases, where the patch is larger, it may be a symptom of a metabolic problem called gangliosidosis type I.
The diagnosis is made by examining the baby and no diagnostic tests are needed.
There is also no need for treatment as it will disappear spontaneously from the age of 6 months.
There is nothing to worry about. Routine visits to the paediatrician will check and monitor the condition as it progresses.
- MedlinePlus. Rockville. 2017. Manchas mongólicas azules; [citado el 12 de julio de 2017]. Disponible en: https://medlineplus.gov/spanish/ency/article/001472.htm
- I. Vitoria. Trastornos cutáneos más frecuentes del recién nacido y del lactante. Dermatitis del pañal. Pediatr Integral 2012;16(3):195-208.
- L. P. Islas, G. Flores. Frecuencia de la mancha mongólica en niños recién nacidos. Rev Mex Pediatr. 2002;69(4):144-145.
- UpToDate [Internet]. Waltham. 2017. Benign skin and scalp lesions in the newborn and young infant; [citado el 12 de julio de 2017]. Disponible en: http://www.uptodate.com/contents/benign-skin-and-scalp-lesions-in-the-newborn-and-young-infant?source=search_result&search=mancha+mongolica&selectedTitle=1~13
© TeckelMedical 2026
