skin pathology
TRANSCRIPT
Skin Pathology
Some T cells selectively home to skin by virtue of homing receptors called Cutaneous Lymphocyte Antigen (CLA)
Epidermis contains intra epithelial lymphocytes including Gamma / Delta cells
Macule
Papule
Nodule
Plaque
Vesicle
Bulla
Pustule
Scale
Lichenification
Excoriation
Hyperkeratosis
Parakeratosis
Acanthosis
Dyskeratosis
Acantholysis
Papillomatosis
Lentiginous
Spongiosis
Acute inflammatory Dermatoses
In Acute – mononuclear cells than neutrophils due to their limited course of their natural history
Urticaria – more common between 20 – 40 yrs
Lesions usually exists for less than 24 hrs Pruritc papule to large edematous plaques
Acute Eczematous dermatitis
Eczema – red , papulo vesicular oozing crested lesion
Later they can develop into raised scaling plaques
Most common form is contact dematitis Spongiosis ossurs So called spongiotic dermatitis
Erythema multiforme
Self limited Hypersensitivity to drugs / infections Drubs – sulphonamides , penicillins , salycylates Infection – HSV , mycoplasma , Fungal infections – Histoplasma Capsulatum and
Coccidiodes imitis Multiform lesions –
1. Targetoid lesion – Red papule or macule with a pale vesicular or eroded centre
2. Papules , macules ,vesicles ,bullae
Chronic inflammatory Dermatoses
1. Psoriasis
2. Lichen Planus
3. Lichen simplex Chronicus
Tumors of skin epithelium
Benign and Premalignant
1. Seborrhic keratitis
2. Sebaceous adenoma
3. Actinic keratitis
Malignant
1. Squamous cell carcinoma
2. Basal cell carcinoma
Tumors of melanocytes
Benign
1. Melanocytic nevi
Malignant
1. Melanoma
Malignant Melanoma