Benign Skin Lesions Flashcards
Achrochordon:
- Skin tags
- Diagnosed based on clinical appearance
Dermatofibromas:
- Dermal proliferation of fibroblasts
- Dark color
- Fitzpatrick’s Sign: lateral pressure causes a depression
Neurofibromas:
- Nerve sheath tumors comprised of neuromesenchymal cells
- Flesh colored
- Button-Hole Sign: direct pressure lesion goes in
Suborrheic keratosis:
- Proliferation of immature Keratinocytes
- Stuck on appearance
Dermatosis papulosa nigra (DPN):
-Multiple hyperpigmented papules on the face of dark skinned people (What Morgan Freeman has)
Sebaceous hyperplasia:
- Enlargement of normal sebaceous glands
- CONFUSED WITH BCC
Epidermoid Cysts:
- Most common cutaneous cysts
- Flesh colored nodule with Central Punctum
- Can become infected: incise and drain; inject around lesion; Must take cyst wall out; cyst wall is friable
Pilar Cysts:
- Subcutaneous nodule originating from root sheath of hair follicle
- Cyst wall is more stable and easier to take out
Pyogenic Granuloma:
- Dome shaped vascular tumor with friable surface
- Must be removed bc it bleeds easily
Lipoma:
- Subcutaneous fat tumor enclosed with thin fibrous capsule
- PAINLESS
Angiolipoma:
- Subcutaneous Fat tumor With Capillary Vessels encapsulated
- PAINFUL
Acquired Melanocytic Nevi (Moles):
- Junctional
- Compound
- Dermal
Halo Nevus/Sutton’s Nevus;
- Outlined with halo of depigmentation
- Back commonly
Blue Nevus:
- Solitary
- Blue-Black
- Dome shaped
Spitz Nevus:
- Childhood
- Face
- Pink or tan
- Dome shaped and Hairless
Ausptitz Sign:
Light scratching of lesion reveals punctate bleeding points common in psoriasis
Darier’s Sign:
Rubbing produces swelling and wheal formation due to urticaria pigmentosa -> mast cell overactive
Nikolsky Sign:
Minor sliding or rubbing separates the outer layer of the epidermis from the basal layer
Koebner Phenomenon:
Lesions in and underlying disease process will appear at a new point in the body after trauma to the new area
