Casal collar

A boy with casal collar caused by pellagra.

The Casal collar or casal necklace is a clinical sign in which there is an erythematous pigmented skin rash in the distribution of a broad collar (dermatomes C3 and C4). It is seen in patients with pellagra,^[1] as a result of niacin (vitamin B₃) deficiency.

The sign is named after Gaspar Casal, who first described pellagra.

References[]

^ Barry G. Firkin, Judith A. Whitworth. Dictionary of Medical Eponyms. Informa Health Care, 2001, page 60. ISBN 978-1-85070-333-4.

External links[]

Image of Casal collar at phoenity.com Accessed on 22 March 2009.

This dermatology article is a stub. You can help Wikipedia by .

This medical sign article is a stub. You can help Wikipedia by .

[1] Barry G. Firkin, Judith A. Whitworth. Dictionary of Medical Eponyms. Informa Health Care, 2001, page 60. ISBN 978-1-85070-333-4.

[1]