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  • Title: Bathtub suction-induced purpura.
    Author: Landers MC, Schroeder TL.
    Journal: Pediatr Dermatol; 2004; 21(2):146-9. PubMed ID: 15078356.
    Abstract:
    We report two cases of bathtub suction-induced purpura. Two girls, ages 9 and 14 years, developed recurring purpura "spontaneously" in the same lower back location and in the same U-shaped distribution. The patients had similar histopathologic findings, with extravasated erythrocytes and a sparse superficial inflammatory infiltrate. After extensive evaluation, one patient eventually admitted to self-inducing her lesions by creating suction against a bathtub. The second patient denied self-inflicting her lesions; however, her purpura improved when she stopped taking baths.
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