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Reticulate nonmelanocytic hyperpigmentation anomaly. A probable variant of Dowling-Degos disease
H A Oriba1, J S Lo, J W Dijkstra
1Department of Medicine, Cleveland Clinic Foundation, Ohio.
International Journal of Dermatology
|January 1, 1991
Summary
This study presents a case of reticulate nonmelanocytic hyperpigmentation, likely a variant of Dowling-Degos disease. The patient exhibited unique skin findings and histological features distinct from classic presentations.
Area of Science:
- Dermatology
- Medical Genetics
Background:
- Dowling-Degos disease (DDD) is a rare genodermatosis characterized by progressive reticulate hyperpigmentation.
- Typical clinical and histological features of DDD include reticulate brown markings, particularly in intertriginous areas, and specific histopathological findings.
Observation:
- A 26-year-old woman presented with a reticulate nonmelanocytic hyperpigmentation anomaly.
- The anomaly manifested as partially blanching red-brown papules and macules.
- Histopathology revealed digitate epithelial budding proliferation with lightly pigmented rete ridges.
Findings:
- The patient's presentation deviated from the classic description of DDD, particularly regarding hyperpigmentation at the rete ridge tips.
- Despite variations, the overall clinical and histological picture strongly suggests a variant form of Dowling-Degos disease.
Implications:
- This case expands the known spectrum of Dowling-Degos disease presentations.
- Recognizing variants is crucial for accurate diagnosis and management of genodermatoses.
- Further research into the genetic basis of DDD variants may elucidate disease mechanisms.