Acanthosis nigricans is characterized by papillomatous brownish lesions mainly in the intertriginous areas. We used dermoscopy to examine such lesions in a family with acanthosis nigricans. The dermoscopic images showed an aberrant skin structure of linear crista cutis and sulcus cutis, and hyperpigmented dots in crista cutis. The hyperpigmented dots, which could not be seen with the naked eyes...

Case Report A 40-year-old priest presented with asymptomatic depigmented and hyperpigmented areas on the palms and the soles of 2i years' duration. The depigmented lesions on the palms had developed first and a month later hyperpigmented lesions appeared nearby. New lesions gradually involved the skin of the backs and sides of the hands and the flexor surface of the wrists. Similar lesions appe...

BACKGROUND Segmental pigmentation disorder (SegPD) is a rare type of cutaneous dyspigmentation. This hereditary disorder, first described some 20 years ago, is characterized by hypo and hyperpigmented patches on the trunk, extremities and less likely on the face and neck. These lesions are considered as a type of checkerboard pattern. CASE PRESENTATION Herein, we present a 26-year-old male wh...

Galli-Galli disease is a rare genodermatosis currently regarded as an acantholytic variant of Dowling-Degos disease. The 2 diseases have the same clinical features: reticular hyperpigmented macules in the great skin folds, erythematous scaly papules and plaques, comedo-like lesions, and pitted perioral scars, and the only differentiating characteristic is the histological finding of acantholysi...

We recently treated a patient who presented with hyperpigmented longitudinal stripe of the thumb nailbed which was biopsied histopathologic diagnosis onychopapilloma. have not seen o...

A patient is reported with mental retardation, facial and body asymmetry, and hyperpigmented areas limited to the right side of the body. Cytogenetic studies revealed trisomy 18 in 50% of peripheral blood lymphocytes; fibroblast cultures from the hyperpigmented area showed pure trisomy 18, while the karyotype on the unaffected side was normal. This could be an example of the 'lines of Blaschko'...

A 21-year-old female presented with multiple hyperpigmented macules on the left side of the face of 17 years’ duration. Hyperpigmented macules were noticed on the left side of the cheek at the age of 4 years, which gradually progressed to involve the left half of the face, neck, chest and upper back. No history of photosensitivity was present. There was no history of epilepsy, mental retardatio...