Exaggerated epidermal pigmentation in acquired dermal macular hyperpigmentation: an important finding

Acquired Dermal Macular Hyperpigmentation

“…Patients with PCD are more likely to show epidermal melanization extending into the upper layers of the epidermis compared to LPP. [ 17 34 ] However, histology of LPP, AD and PCD is largely overlapping and the final diagnosis is reached based on clinical correlation. [ 32 ]…”

Intriguing concept of pigmented contact dermatitis: Further understanding the role of hair colours including natural henna

“…[4][5][6] Long incubation period between commencing hair colour usage and onset of pigmentation low positivity rates of traditional patch testing makes linking hair colours with PCD and subsequent patient counselling quite difficult. 6,7 However, our experience derived from managing a large cohort of Southeast Asian patients having PCD suggests that avoiding use of hair colours perhaps forms the most important non-pharmacologic treatment measure instituted for these patients in addition to stringent photoprotection. 6 Importantly, in the study by Kim Y.C.…”