Hypomelanosis guttata idiopathica

Last Updated: 2022-07-22

Author(s): Anzengruber F., Navarini A.

ICD11: -

Costa 1951

Cummings 1966

Leucoderma lenticulare disseminatum, idiopathic guttate hypomelanosis

UV-induced hypopigmentation of the skin.

Especially in patients with fair skin types and a lot of UV exposure.

Chronic UV exposure.

Sharply circumscribed, localised mainly on the extensor sides of the extremities, partly confluent, disseminated, whitish macules.

Anamnesis

Clinical picture

If diagnostic uncertainty exists, a biopsy may be performed.

UV exposure?

Ortho- to hyperkeratosis. Reduced number of melanin granules in the str. basale.

No causal therapy.

Use sunscreen to prevent further skin damage.

  1. Kakepis M, Havaki S, Katoulis A, Katsambas A, Stavrianeas N, Troupis TG. Idiopathic guttate hypomelanosis: an electron microscopy study. J Eur Acad Dermatol Venereol. 2015 Jul;29(7):1435-8.
  2. Kakepis M, Havaki S, Katoulis A, Katsambas A, Stavrianeas N, Troupis TG. Dermoscopy of idiopathic guttate hypomelanosis. J Dermatol. 2015 Nov;42(11):1118-9.
  3. Juntongjin P, Laosakul K. Idiopathic Guttate Hypomelanosis: A Review of its Etiology, Pathogenesis, Findings, and Treatments. Am J Clin Dermatol. 2016 Aug;17(4):403-11.