Acanthosis nigricans

DDx

Nevi
Reticulated pigment anomaly (Dowling-Degos disease)
Confluent and reticulated papillomatosis (of Gougreot and Carteaud)

Associated conditions

Obesity
Insulin resistance syndrome
Diabetes
Cushing's disease
Acromegaly
Hypothyroidism or hyperthyroidism
Occult malignancy

See related DDx

Paraneoplastic syndromes

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