A rare pigmented lesion of the eyelid
The term melanoacanthoma was coined by Mishima and Pinkus in 1960. Melanoacanthoma is a rare benign pigmented lesion which is composed of both keratinocytes and melanocytes. The lesion is slow growing and usually presents as solitary lesion over the head and neck, or trunk, of older people.

A 61-year-old female presented with a swelling in her right lower lid for the past 4 years associated with itching; she had a past history of falling of tree extract in the same eye; after that, the mass was slowly increasing in size. On examination, 8 mm × 4 mm × 3 mm brownish black-colored firm, mobile, and painless swelling involving the medial half of lower lid with sparing of punctum was noticed.

The patient was hypertensive; other than that, there were no systemic abnormalities and lymphadenopathy found. Based on these findings, clinical differential diagnosis offered was seborrheic keratosis and nevus, and subsequently, the patient underwent shave biopsy and histopathological examination.

Source: International journal of trichology

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