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Annales de Dermatologie et de Vénéréologie
Vol 134, N° 5  - mai 2007
pp. 477-478
Doi : AD-05-2007-134-5-0151-9638-101019-200520010
Dermatite purpurique de contact au suc d'Agave americana

[1] 8, rue Albert 1er, 64100 Bayonne
[2] Service de Dermatologie, CHU Angers.

Tirés à part : N. Genillier-Foin, à l'adresse ci-dessus (1).


Le contact cutané avec le suc d'Agave americana, plante de la famille des Agavacées, riche en oxalate de calcium et saponines irritants est à l'origine de dermatites d'irritation habituellement papulo-vésiculeuses, très rarement purpuriques.


Le cas rapporté est celui d'une dermatite purpurique des membres inférieurs simulant un purpura par vasculite survenu chez un homme de 52 ans qui avait débité quelques heures plus tôt une agave à l'aide d'une tronçonneuse.


Ce cas est similaire en tout point à trois autres cas de la littérature. Dans les quatre cas, les malades avaient utilisé des engins favorisant les projections de débris de plante (tronçonneuse, débroussailleuse). Ceci a pu favoriser des lésions vasculaires par traumatisme direct ou faciliter la pénétration des agents irritants en profondeur au contact des petits vaisseaux.

Purpuric contact dermatitis from Agave Americana.

Irritant papulovesicular dermatitis after cutaneous exposure to the sap of Agave Americana, which contains chemical irritants such as calcium oxalate and saponins, is well known, but purpuric dermatitis is rare in such cases.

Case report

We report the case of a 52 year-old man with purpuric dermatitis of the legs mimicking purpura vasculitis that appeared a few hours after he had cut down a large Agave with a chain-saw.


Our case is quite similar to three other cases found in the literature. In all four cases the patients had been using machines causing projections of plant fragments (chain-saw, trimmer). This may have promoted vascular damage, either by direct traumatism or by embedding oxalate crystals and saponins in the skin close to small vessels.

© 2007 Elsevier Masson SAS. Tous droits réservés.
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