Primary and Secondary Lesions Flashcards
Vesicle > 1 cm
Bulla
Blisters, pemphigus vulgaris
Bulla
Palpable. Elevated, circumscribed, encapsulated lesion in dermis or subcutaneous layer
Cyst
Flat, circumscribed lesion changed from normal color of skin.
Macule
Freckles, nevi (small moles)
Macule
Elevated, firm “marble-like” circumscribed lesion deeper in dermis than a papule
1-2cm
Nodule
Erythema nodosum, fungal infection, lipoma, neoplasms, sarcoidosis, tuberculosis
Nodule
Elevated, firm circumscribed area
Papule
Lichen planus, mastocytoma, wart
Papule
Flat, non-palpable irregulary shaped macule >1cm
Patch
Cafe-au-lait patch, mongolian spots, port-wine stains, vitiligo
patch
Cafe-au-lait patch is also known as
birthmark
Red, purple, nonblanching discoloration
Less than 0.5cm
Greater than 0.5cm
Petechiae or purpura
Petechiae
Purpura
Caused by RBCs leaking out of capillaries. Trauma is most common cause
Petechiae and purpura
Directly associated with disease process
Primary lesions
Differential for ecchymoses must always include
physical abuse
DIC, Henoch-Schonlein purpura, RMSF, and thrombocytopenia
Petechiae and purpura
Elevated, firm and rough lesion with flat top surface > 1 cm
Plaque
Actinic keratosis, psoriasis, and seborrheic keratosis
plaque
Elevated, superficial lesion similar to a vesicle but with purulent fluid (pus)
Pustule
Acne, folliculitis, impetigo
Pustule
Fine, irregular red lines due to capillary dilatation
telangiectasia
Acne rosacea
telangiectasia
Elevated, solid lesion deep in dermis >2cm
tumor
Benign tumors, neoplasms
tumor