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plaque
A small differentiated area on a body surface (skin, mucosa, endothelium) or on a cut surface of an organ (brain).
Also see:
1) amyloid plaque
2) dental plaque
3) atheroma
In dermatology:
- a macroscopic term referring to an elevated, generally flat-topped area >= 1 cm across
- plaques are generally formed from confluent papules
Classification:
1) red, scaling plaques
- psoriasis
- pityriasis rosea
- discoid lupus erythematosus
- Tinea corporis
2) yellow plaques: xanthomas
3) brown plaques: seborrheic warts
4) lichenified plaques: atopic dermatitis
5) keratotic plaques: plantar warts
6) plaque with scale or roughed surface
- warts
- seborrheic keratosis
- squamous cell carcinoma
- psoriasis
- pityriasis rosea
- fungal infection - Candidiasis, Tinea infection
- chronic eczema
- lupus erythematosus
7) other
- acanthosis nigricans
- cellulitis
- contact dermatitis
- diaper dermatitis
- eczematous dermatitis
- erythrasma
- granuloma annulare
- ichthyosis
- lichen planus
- lichen sclerosus
- Lyme disease
- cutaneous T-cell lymphoma
- morphea
- myxedema (Graves disease)
- necrobiosis lipoidica diabeticorum
- Paget's disease
- sarcoidosis
- seborrheic dermatitis
- Sweet's syndrome
- syphilis
- vasculitis
- Vexas syndrome (erythematous, edematous annular (oval) plaques)
- xanthelasma
Related
amyloid (senile, neuritic) plaque
atheroma (atherosclerotic plaque)
dental (bacterial) plaque (tartar)
papules, nodules & plaques by color
Specific
woody plaque
General
skin lesion
abnormal morphologic structure (malformation)
References
- Cotran et al Robbins Pathologic Basis of Disease, 5th ed.
W.B. Saunders Co, Philadelphia, PA 1994 pg 1174
- DeGowin & DeGowin's Diagnostic Examination, 6th edition,
RL DeGowin (ed), McGraw Hill, NY 1994, pg 54
- Medical Knowledge Self Assessment Program (MKSAP) 11, 15, 18
American College of Physicians, Philadelphia 1998, 2009, 2018
- UpToDate 14.1
http://www.utdol.com