Fig. 54. Papillomas. A. Squamous cell papilloma of lacrimal sac shows epidermal papillomatosis and acanthosis. B. Transitional cell papilloma showing glandlike structures containing goblet cells within proliferated, thickened epithelium. (From Ryan SJ, Font RL: Primary epithelial neoplasms of the lacrimal sac. Am J Ophthalmol 76:73, 1973.)