Acquired hyperpigmentations

Abstract

Cutaneous hyperpigmentations are frequent complaints, motivating around 8.5% of all dermatological consultations in our country. They can be congenital, with different patterns of inheritance, or acquired in consequence of skin problems, systemic diseases or secondary to environmental factors. The vast majority of them are linked to alterations on the pigment melanin, induced by different mechanisms. This review will focus on the major acquired hyperpigmentations associated with increased melanin, reviewing their mechanisms of action and possible preventive measures. Particularly prominent aspects of diagnosis and therapy will be emphasized, with focus on melasma, post-inflammatory hyperpigmentation, periorbital pigmentation, dermatosis papulosa nigra, phytophotodermatoses, flagellate dermatosis, erythema dyschromicum perstans, cervical poikiloderma (Poikiloderma of Civatte), acanthosis nigricans, cutaneous amyloidosis and reticulated confluent dermatitis

Acquired linear hyperpigmentation of the lips – a new entity?

“…PIH is preceded with a cutaneous inflammatory process. 4,5 In our series, no patient reported a pre-inflammatory phase. No consistent topical product was noted among all patients nor any other potential chronic stimuli of this area.…”

Facial Hyperpigmentation in Skin of Color: Special Considerations and Treatment

“…The condition is more commonly seen in women of reproductive age, especially in those with darker skin originating from East and Southeast Asia or Latin America [7].…”

“…A Wood's lamp can be used to aid in diagnosis and guide prognosis. The epidermal type shows enhanced lesional pigmentation with a Wood's lamp, whereas the dermal type does not [7]. Wood's light examination can also be useful in examining disease extent because it can elucidate subclinical disease that is not visible on routine clinical exam alone.…”

Facial hyperpigmentations and their management

“…Deri rengi daha koyu olan insanlar, bazal epidermal melanin miktarı-nın daha fazla olması nedeniyle PİH gelişimine daha yatkın olurlar; gelişen hiperpigmentasyon çoğu kez tedavilere daha dirençlidir (14) .…”