Case presentation
A 32-year-old woman presented with a unilateral small brown blaschkoid
sessile and pedunculated papules on the right side of her abdomen in the
past 4 years. She did not complain from any symptom except for
occasional pruritus. The lesions appeared during her first pregnancy and
became more prominent and increased in number during her second
pregnancy. Past medical history and examination were otherwise
unremarkable.
On dermoscopic examination multiple round and oval brown pigmented
circles with irregular borders and some smaller circles were seen in a
homogenous light brown background(Fig 1).
Histology examination revealed a thick orthokeratosis, papillomatosis,
coarse keratohyalin granules, and some vacuolated cells with dark
basophilic nuclei known as epidermolytic hyperkeratotic pattern. Some
superficial lymphocytic infiltration was also noted in the dermis.
Regarding the history, clinical manifestation and histopathologic
findings diagnosis of epidermolytic hyperkeratotic EN was made (Fig 2).