Skin biopsy can detect epidermal lesions, dermal and subcutaneous tissue lesions, etc. The former includes hyperkeratosis, hyperkeratosis, etc., and the latter includes mucous degeneration and granuloma.
1.Epidermal lesions:
(1) Hyperkeratosis: seen in lichen planus, palmoplantar keratosis, ichthyosis, etc.
(2) Hyperkeratosis: seen in pityriasis rosea, sweat pore keratosis, etc.
(3) Dyskeratosis: benign diseases include follicular keratosis, viral infection, etc. Malignant diseases are most commonly seen in squamous cell carcinoma.
(4) Granular layer thickening: seen in chronic simple moss, lichen planus and so on.
(5) Hypertrophy of the stratum spinosum: see psoriasis and chronic dermatitis, etc.
(6) Warty hyperplasia: seen in common warts, warty nevus, etc.
(7) Papillomatous hyperplasia: seen in acanthosis nigricans, sebaceous nevus, etc.
(8) Pseudoepithelioma-like hyperplasia: common in chronic granulomatous disease, etc.
(9) Intracellular edema: seen in viral skin diseases, contact dermatitis, etc.
(10) Intercellular edema: seen in dermatitis eczema, etc.
(11) Loosening of the spinous layer: seen in aspergillosis, follicular keratosis, etc.
(12) Basal cell liquefaction and degeneration: seen in lichen planus, lupus erythematosus, etc.
2. Dermal and subcutaneous tissue lesions:
(1) Mucous degeneration: seen in elastic fiber pseudoxanthoma, etc.
(2) Granuloma: see nodular disease, tuberculosis, leprosy, etc.
(3) Fibrin-like degeneration: seen in lupus erythematosus, cutaneous vasculitis, etc.
(4) Basophilic degeneration: seen in actinic keratosis, etc.
(5) Progressive necrosis: seen in granuloma annulare, rheumatoid nodules, etc.
The purpose of skin biopsy is to clarify the diagnosis of the disease and help guide the next step of treatment, patients do not need to be overly panicked, and can communicate with the attending physician to learn more and eliminate concerns.