“Acral” refers to extremities, tips or high points. It often means fingers and toes, but can include the tip of the nose and ears. It also can more loosely mean: hands and feet. There are two useful clinical ddx’s:
acrodermatitis chronica atrophicans acrodermatitis continua (Hallopeau) acrodermatitis enteropathica papular acrodermatitis of childhood (Gianotti-Crosti) acrokeratosis verruciformis (histology: "church-spire" papillomatosis) acrokeratosis paraneoplastica acroangiodermatitis (pseudo-KS) acrodynia acrocyanosis acrokeratoelastoidosis of Costa |
other:
| • | erythema multiforme |
| • | scabies |
| • | Janeway lesions |
| • | Osler nodes |