Generalized lichen amyloidosis in a pregnant woman: Coincidence or association

A 32-year-old Thai woman in her first pregnancy presented with multiple hyperpigmented, hyperkeratotic, pruritic, discrete papules coalescing to form plaques with a rippled pattern on the extensor surfaces of upper and lower limbs, back, chest, and abdomen. Her mother had a similar history. Histopathology of the lesion revealed a diagnosis of lichen amyloidosis, confirmed by the Congo red stain. The lesions had started one year prior and had remained stable before pregnancy; however, they became widespread after pregnancy. Thus, prompting the question as to whether this was a coincidence or if the pregnancy had exacerbated the condition. In this case report, we will discuss our approach to this patient and our opinions concerning the relationship between pregnancy and lichen amyloidosis.