title: Juvenile conjunctival nevus: clinicopathologic analysis of 33 cases.
abstract: Conjunctival nevi in children and adolescents often have histologic features that can be difficult to differentiate from malignancy. We have identified a subset of childhood nevi displaying a confluent growth pattern and a lack of maturation that we have defined as juvenile conjunctival nevi (JCN), with the aim of further describing the clinicopathologic features of these lesions. Lesions identified as conjunctival nevus in a tertiary referral hospital were reviewed and the subset of lesions identified as JCN were further evaluated. Clinical details including follow-up data were also gathered. Of the 40 conjunctival nevi identified, 33 fit the criteria for JCN. The mean age at time of excision was 10.9 years (range: 4 to 19 y). Thirty-two lesions were of the compound type; one was a junctional nevus. All showed a nested junctional growth pattern. In 17 lesions (61%), the junctional component extended beyond the subepithelial component (shoulder phenomenon). Maturation was absent in 21 of the compound nevi (66%, average age 10.3 y), and incomplete in the remaining 11 lesions (34%, average age 12.1 y). The nuclei of the subepithelial nevus cells were larger than the epithelial nevus cells in 19 nevi (59%) and the same size in 13 (41%). A lymphocytic host response was present in 17 lesions (52%). Mitotic figures were rarely seen. None of the lesions had recurred over an average follow-up period of 34 months. Recognition of JCN as a distinct morphologic variant of a conjunctival nevus with characteristic histologic features may help to distinguish this benign lesion from melanoma.
authors.affiliation: Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, MA, USA.
authors.forename: Sureka
authors.initials: S
authors.lastname: Thiagalingam
authors.forename: Matthew M
authors.initials: MM
authors.lastname: Johnson
authors.forename: Kathryn A
authors.initials: KA
authors.lastname: Colby
authors.forename: Artur
authors.initials: A
authors.lastname: Zembowicz
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003230:Conjunctival Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D009506:Nevus / Q000473:pathology*