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This case report describes a unique instance of an otherwise healthy infant with phylloid terminal hair nevus, a form of hypomelanosis without extracutaneous abnormalities.

This index of Harper's Textbook of Pediatric Dermatology, Fourth Edition, provides no clinical results or new findings.

This article discusses various periocular conditions like madarosis, milphosis, trichomegaly, and dermatochalasis, and highlights their potential link to underlying local and systemic diseases, but reports no new clinical findings.

This review discusses segmental vitiligo as part of the vitiligo clinical spectrum and highlights its role as a model for studying repigmentation, but reports no new clinical results.

This review outlines evidence-based strategies for diagnosing pediatric hypopigmented disorders and emphasizes distinguishing vitiligo from self-limiting conditions through a systematic clinical approach; no new results are reported.

This review elaborates on the concept of cutaneous mosaicism and its link to acneiform conditions, but it reports no new clinical results.

This review discusses the diagnosis and treatment of pityriasis rubra pilaris and reports no new clinical results.

This case study describes an elderly woman with distinctive black hair patches and scalp pigmentation, but it does not provide a diagnosis or new findings.

This study reported the case of a 30-year-old man with a bluish-grey scalp nodule that developed over a previously stable hairless plaque, revealing histopathological features consistent with epithelioid cell nests and spindle-shaped dermal melanocytes embedded in collagen.

This case report describes three Iranian men with gradual reddish-brown pigmentation on their cheeks and preauricular areas since childhood, unresponsive to sunblocks and topical steroids.

This review discusses the genetic and metabolic factors influencing hair pigmentation, as well as conditions leading to hypo- or depigmented hair, and reports no new experimental findings.

This article reviews various "white diseases" characterized by hypopigmentation or depigmentation and emphasizes the role of melanosomes in skin and eye color, but it does not present new clinical results.

This case report describes a patient with eruptive tumor of follicular infundibulum, emphasizing the need for dermatologists to include it in the differential diagnosis of acquired facial hypopigmentation.

This study reported that in men with androgenic alopecia, a distinct subclinical hyperpigmentation pattern was observed in the scalp, associated with baldness severity and possibly linked to local melanin production by pilosebaceous units.

In this case study, a 34-year-old woman with a rare presentation of pilomatrixoma involving alopecia and skin hypopigmentation showed no improvement in these symptoms despite a 3-month trial of topical steroid treatment, highlighting a potential association between pilomatrixoma and microinflammation.

This case report describes a 7-year-old boy with pityriasis versicolor presenting as scalp hypopigmentation, a rare distribution for this fungal infection. Diagnosis was confirmed via Wood's lamp examination and microscopy, and the condition resolved after treatment with topical terbinafine hydrochloride cream.

In this study, the researchers found that trichoscopy can effectively visualize scalp micropigmentation, identified by homogenous, grey to black circular dots similar to closely cut hair, potentially reducing the need for invasive procedures.

In this case study, the researchers reported a rare incidence of bilateral hyperpigmented macules on a patient's lower legs, possibly due to cyclophosphamide, suggesting that this chemotherapy drug may directly stimulate hair follicles to cause skin discoloration.

This review discusses the clinical features of hypopigmented mycosis fungoides in primary cutaneous T cell lymphoma and reports no new clinical results.

This case report describes reversible hypopigmentation of hair in a child due to vitamin B12 deficiency, which improved after vitamin B12 supplementation.

This case report describes perifollicular melanocyte regeneration in the affected skin of a patient with bullous pemphigoid, highlighting an underreported aspect of the condition in skin of color patients, and emphasizing the need for increased awareness and earlier diagnosis in this demographic.

This article explores the causes and associated syndromes of premature hair hypopigmentation, emphasizing a need for better understanding to guide individual patient education and treatment.

This report describes two cases of sustained hair repigmentation related to porphyria cutanea tarda, though the underlying mechanism remains unclear.

This study examined skin biopsies from a woman with Addison disease and found melanocytic hyperpigmentation in the epidermis, with a notable melanocyte/keratinocyte ratio indicating increased melanocyte presence in the arm compared to the thigh.

This study found that patients with frontal fibrosing alopecia had lower epidermal melanocyte counts and reduced epidermal thickness compared to lichen planopilaris patients and controls, suggesting a link with hypopigmentation.

This article discusses the potential involvement of hair follicle melanocytes in follicular vitiligo, noting a pattern of depigmentation centered on follicles and supported by inflammatory infiltrates, without reporting new clinical results.

This article describes a case of oral pigmentation that posed a diagnostic challenge in determining Addison’s disease and includes a brief review, reporting no new clinical results.

This case series reports the specific dermoscopic features observed in two patients with syphilitic alopecia, highlighting alopecic patches with empty hair follicles and other distinguishing characteristics that may aid in differentiating it from other hair disorders.

Topical eyedrops may cause eyelash whitening and skin lightening around the eyes.