Syringocystadenoma Papilliferum Associated with Poroma Folliculare

A 70-year-old woman had a dome-shaped with a keratinous mass nodule which measured 1.0 × 1.0 × 0.9 cm on the inner canthus. Multiple confluenced vesicles were seen in a small area of the tumor. Histological examination revealed that the tumor had two different portions. The larger portion was poroma folliculare and the smaller was syringocystadenoma papilliferum. We collected cases of syringocystadenoma papilliferum reported in Japan, but there were no other cases associated with poroma folliculare. We suggest that a teratogenic follicle developed poroma folliculare on one side and syringocystadenoma papilliferum on the other.