annular skin lesions
Last reviewed 01/2018
| morphology | | scale,
hyperkeratosis or crust usually present | non-scaling* |
| Typically
annular lesions | common/fairly common causes | -
ringworm (scaling particularly at margin)
- porkeratosis (keratotic border)
- pityriasis
rosea - herald patch
| - granuloma annulare
- Jessner's
lymphocytic infiltrate
- morphoea (not annular lesions but often has annular
violaceous margin)
|
| | less
common causes | - erythema annulare centrifugum
- subacute
cutaneous lupus erythematosus
- pigmented purpuric dermatoses (fine scale
only)
- linear IgA disease, chronic bullous dermatosis of childhood
- actinic
granuloma
- eczema surround a naevus (Meyerson's naevus)
| - purpura
annularis telangiectodes
- serum sickness and serum sickness-like drug eruption
- erythema
(chronicum) migrans
- 'annular erythemas' with deeply situated infiltrate
|
| Often
includes some annular or incompletely annular (arciform) lesions | common/fairly
common causes | - psoriasis
- bullous pemphigoid
- seborrhoeic
dermatitis of the trunk
- subacute cutaneous lupus erythematosus (papulosquamous/psoriasiform
type)
- impetigo
| - urticaria
- erythema
multiforme
- lichen planus (particularly male genital) *
|
| | less
common causes | - mycosis fungoides
- atopic dermatitis
**
| - cutaneous sarcoidosis*
- B-cell
lymphoma of skin
|
* some typically non-scaling disorders
may occur as less common variants with scale
** atopic dermatitis is common,
but discoid or annular lesions are relatively uncommon
Reference:
- (1)
Smith LC et al. A guide to annular eruptions. Dermatology in Practice (April 2008);
16(1).
Related pages:
common/fairly common causes of scaly annular lesions
common/fairly common causes of non-scaly annular lesions
