Image Based Question – 73654

A lady came with complaints of a bluish lesion over left side of forehead and left eye. An irregular bluish lesion in left superior conjunctive and forehead is seen. What is the diagnosis?

A. Nevus of Ota

B. Nevus of Ito

C. Becker’s nevus

D. Mongolian spot

Correct Answer » A Explanation

Ans: A. Nevus of Ota

(Rep Neena Khanna 4/e p355)

• Here irregular bluish lesion in left superior conjunctiva in female patient = Most probable diagnosis = Nevus of Ota.

Nevus of Ota:

• More common in females.
• Asian and African-American patients
• Present at birth or appears in infancy.

Characteristic Features:

Macular pigmentation:

• More prominent slate grey hyperpigmentation –
• Due to dermal melanocytes and brownish epidermal pigmentation.
• Distribution along maxillary division of trigeminal nerve.
• Pigmentation of sclera (slate gray) & conjunctiva (brown) present.
• Patchy involvement of conjunctiva, hard palate, pharynx, nasal mucosa, buccal mucosa, or tympanic membrane occurs.