Every day one disease – Pigmented Nevi

Pigmented Nevi

Definition: Pigmented cellular nevi are benign malformations of me­lanocytes and “nevus cells,” common in the skin and rare in the oral mucosa.

Etiology: Developmental. Melanocytes and nevus cells of neural crest origin.

Clinical features: Based on histological criteria, oral pigmented nevi are classified into four types: intramucosal, junctional, compoundand blue. Clinically, the lesion appears as an asymptomatic, well-demarcated, flat or slightly elevated, brown, black, or blue spot or plaque (Fig. 90). The lesion is usually solitary, with a diameter of less than 1 cm. The palate, gingiva, buccal mucosa, and lips are the sites of predilection.

Laboratory tests: Histopathological examination.

Differential diagnosis: Ephelis, lentigo, melanoma, amalgam tattoo.

Treatment: Usually, no treatment is required. Conservative surgical excision is carried out in some cases.

 
Every day one disease – Pigmented Nevi

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