Senile Gluteal Dermatosis (SGD) is a benign, nonbullous skin disorder affecting adults.

Mechanism: possibly pressure induced


Clinical features:

(1) hyperkeratotic lichenified skin

(2) superior part and both sides of the anal cleft

(3) occurrence in sedentary and elderly patients

(4) no or mild symptoms

(5) no other explanation


Risk factors:

(1) longer duration of a sedentary lifestyle

(2) diabetes mellitus

(3) low lean body mass

(4) sleeping on a Korean-style mattress


Histologic features:

(1) hyperkeratosis

(2) acanthosis

(3) follicular plugging

(4) mild increase in small blood vessels

(5) mild lymphohistiocytic inflammation

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