Recurrence of Primary Acquired Melanosis and Conjunctival Intraepithelial Neoplasia.

Introduction: The aim of this study was to investigate the frequency of recurrences, time to recurrence, and which patients had a recurrence after treatment of conjunctival intraepithelial neoplasia (CIN), carcinoma in situ, and primary acquired melanosis (PAM) with atypia.

Methods: A retrospective chart review of all patients included in the follow-up program after completion of treatment for CIN or PAM with atypia on October 18, 2021, at the Department of Ophthalmology, Sahlgrenska University Hospital, was conducted.

Results: There were five recurrences (5/31, 17%) in the group with CIN or carcinoma in situ: two for patients with CIN grade II and three for individuals with carcinoma in situ. Time to diagnosis of recurrence ranged from 6 to 288 months. No recurrence was diagnosed for the 26 patients followed after treatment for PAM with atypia.

Conclusion: With the strategy of radical treatment for CIN and PAM with atypia, whenever possible, subsequent follow-up can probably be ceased after 10 years if the patient is not immunocompromised. For completely excised PAM with atypia grade I, there is most likely no need for further clinical controls.