Ota nevus - Ota Naevus
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Cela peut affecter la zone conjonctivale.
References
Ota Nevus est un assombrissement bénin de la peau, principalement autour de la zone du nerf trijumeau, affectant principalement les régions de l'œil desservies par les première et deuxième divisions de ce nerf. Cette affection, également appelée mélanose cutanée oculaire, provoque une décoloration gris-bleu due aux mélanocytes piégés. Elle apparaît généralement sur un côté du visage et peut toucher les yeux, la peau du visage et parfois le palais. Les personnes atteintes de cette maladie ont un risque plus élevé de développer un mélanome oculaire et un glaucome. Le naevus d'Ito est similaire mais affecte différentes zones nerveuses.
Nevus of Ota is a benign melanosis that primarily involves the region of the trigeminal nerve distribution. The first and second divisions of the trigeminal nerve, namely the ophthalmic V1 and the maxillary V2 are most commonly involved. There is associated hyperpigmentation of the eye. Nevus of Ota is also known as ocular dermal melanosis. The characteristic gray-blue hyperpigmentation occurs due to entrapped melanocytes. Unilateral presentation is more common. The melanocytes are entrapped leading to gray-blue hyperpigmentation of the conjunctiva and sclera along with ipsilateral facial skin. There is an increased risk of uveal melanoma and glaucoma in these cases. Palatal involvement may also occur. Nevus of Ito is very similar to nevus of Ota except it differs in the territory of distribution. It was described by Minor Ota in 1954. It involves the distribution territory of lateral cutaneous brachial nerves of the shoulder and posterior supraclavicular nerves. Both of these diseases share similar pathophysiology.
Nevus of Ota is a benign melanosis that primarily involves the region of the trigeminal nerve distribution. The first and second divisions of the trigeminal nerve, namely the ophthalmic V1 and the maxillary V2 are most commonly involved. There is associated hyperpigmentation of the eye. Nevus of Ota is also known as ocular dermal melanosis. The characteristic gray-blue hyperpigmentation occurs due to entrapped melanocytes. Unilateral presentation is more common. The melanocytes are entrapped leading to gray-blue hyperpigmentation of the conjunctiva and sclera along with ipsilateral facial skin. There is an increased risk of uveal melanoma and glaucoma in these cases. Palatal involvement may also occur. Nevus of Ito is very similar to nevus of Ota except it differs in the territory of distribution. It was described by Minor Ota in 1954. It involves the distribution territory of lateral cutaneous brachial nerves of the shoulder and posterior supraclavicular nerves. Both of these diseases share similar pathophysiology.
Congenital dermal melanocytosis est également connu sous le nom de spot mongol. Il s’agit d’un type de tache de naissance courant chez les nouveau-nés. Il apparaît sous forme de taches gris-bleu sur la peau dès la naissance ou peu de temps après. Ces marques se trouvent généralement sur le bas du dos et les fesses, les épaules étant le prochain endroit commun. Ils sont plus fréquents chez les nourrissons asiatiques et noirs, touchant autant les garçons que les filles. Habituellement, ils disparaissent d’eux-mêmes entre 1 et 6 ans et ne nécessitent généralement aucun traitement car ils sont pour la plupart inoffensifs.
Congenital dermal melanocytosis, also known as Mongolian spot or slate gray nevus, is one of many frequently encountered newborn pigmented lesions. It is a type of dermal melanocytosis, which presents as gray-blue areas of discoloration from birth or shortly thereafter. Congenital dermal melanocytosis is most commonly located in the lumbar and sacral-gluteal region, followed by shoulders in frequency. They most commonly occur in Asian and Black patients, affect both genders equally, and commonly fade by age 1 to 6 years old. Congenital dermal melanocytoses are usually benign and do not require treatment.
Congenital dermal melanocytosis, also known as Mongolian spot or slate gray nevus, is one of many frequently encountered newborn pigmented lesions. It is a type of dermal melanocytosis, which presents as gray-blue areas of discoloration from birth or shortly thereafter. Congenital dermal melanocytosis is most commonly located in the lumbar and sacral-gluteal region, followed by shoulders in frequency. They most commonly occur in Asian and Black patients, affect both genders equally, and commonly fade by age 1 to 6 years old. Congenital dermal melanocytoses are usually benign and do not require treatment.
L'utilisation d'un laser à commutation Q de 1 064 nm s'est révélée efficace dans le traitement du naevus d'Ota.
○ Traitement
#QS-1064 laser