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Lentigo, reticularL81.4

Author:Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

Ink-spot lentigo; Reticulated black solar lentigo

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DefinitionThis section has been translated automatically.

Deep dark, melanocytic nevus clinically resembling a malignant melanoma.

EtiopathogenesisThis section has been translated automatically.

Solar pollution. Can also be observed after PUVA therapy, but PUVA lentigines usually occur multiple times, while the ink-spot lentigo occurs mainly solitary.

ManifestationThis section has been translated automatically.

Almost exclusively occurring in adults.

LocalizationThis section has been translated automatically.

Especially back and shoulder parts.

Clinical featuresThis section has been translated automatically.

Pinhead to o.5 - 1.0 cm large, sharply defined pigmentation with irregular, light to dark brown, net-structured pigmentation.

Reflected light microscopy: Regular, prominent pigment net, possibly central diffuse pigmentation. No black dots, brown globules or pseudopodia.

HistologyThis section has been translated automatically.

Sharply defined distinct, focally homogeneous, basal pigmentation of the epidermis with increased number of melanocytes. Lengthened and widened retele bands. Suprapapillary epidermis parts are only slightly pigmented.

Differential diagnosisThis section has been translated automatically.

Verruca seborrhoica; initial malignant melanoma.

LiteratureThis section has been translated automatically.

  1. Bolognia JL (1992) Reticulated black solar lentigo ('ink spot' lentigo). Arch Dermatol 128: 934-940
  2. Haas N et al (2002) Detection of a novel pigment network feature in reticulated black solar lentigo by high-resolution epiluminescence microscopy. At J Dermatopathol 24: 213-217
  3. Kaddu S et al (1997) Reticular lentigo. dermatologist 48: 181-185
  4. Smith SR, O'Grady TC (1996) Reticulated ephelides: 'inkspots' revisited. Arch Dermatol 132: 353-354

Authors

Last updated on: 29.10.2020

Author: Prof. Dr. med. Peter Altmeyer

Editors: Dr. Michael HambardzumyanDr. med. Fabian Müller