Abstract
Conjunctival nævus is a common tumour in the conjunctiva. It can appear clinically in childhood or adolescence. The juxta limbic location (on the temporal side and near the palpebral fissure) of the nævus is the most frequent. Its presence at the level of the lacrimal caroncula (inner angle of the eye) and the semi-lunar fold (outside the caroncula) is more rare. Their pigmentation varies with age. Thus, almost 25% of them are amelanotic (especially in children). The pigmentation varies according to several factors: the congenital character of these nævi; hormonal changes during pregnancy; intense exposure to the sun. In addition, a change in pigmentation can be observed in almost 25% of cases with inflammation, or in cases of intense activity of melanophages. The size of the nævi tends to increase with age. This is usually done after puberty. We report a case of a 2-year-old boy with a pigmented conjunctival nævus about 2 cm long, flat, limbal and bulbar juxta at the temporal side. The rest of the eye exam is normal. The child has been entrusted to the team of the orbito-palpebral surgery and the annexes for the continuation of the management. We will present its clinico-histological and therapeutic aspects.
Highlights
Nævus are the most frequent tumours of the ocular surface
A nævus located at the epithelium-chorion junction is called a nævus jonctionnel, whereas a nævus exclusively located at the level of the chorion will be called a nævus sous-épithélial or intrastromal
Conjunctival nævus is a congenital tumor classified as hamartoma or an acquired tumor included in neoplasia
Summary
Nævus are the most frequent tumours of the ocular surface. In the series published by Shields, it represents 28% of conjunctival tumours and 52% of melanocytic tumours [1]. The nævus consists of nævic cells arranged in thecae. These thecae are initially located at the junction between the epithelium and the chorion. Conjunctival nævus is a congenital tumor classified as hamartoma or an acquired tumor included in neoplasia. It may be present clinically at birth or appear during the first or second decade. It presents as a flat or sessile lesion with a very discrete relief, achrome with pinkish appearance in 15 to 20% of cases, partially pigmented in 20 to 30% and fully pigmented in 50 to 65% of cases. We present a case of unilateral right conjunctival nævus
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