Actinic keratosis is most reliably diagnosed by which method?

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Multiple Choice

Actinic keratosis is most reliably diagnosed by which method?

Explanation:
Actinic keratosis is a sun-induced premalignant lesion of the epidermis, and the definitive confirmation comes from tissue examination. A skin biopsy with histopathology reveals atypical keratinocytes confined to the epidermis, often with features like parakeratosis and solar elastosis, which confirms the diagnosis and helps determine if there is any invasion toward squamous cell carcinoma. Visual inspection can raise suspicion but cannot prove the diagnosis or distinguish AK from similar sun-damaged lesions or from skin cancer. Blood tests and MRI do not provide diagnostic information for this superficial skin condition.

Actinic keratosis is a sun-induced premalignant lesion of the epidermis, and the definitive confirmation comes from tissue examination. A skin biopsy with histopathology reveals atypical keratinocytes confined to the epidermis, often with features like parakeratosis and solar elastosis, which confirms the diagnosis and helps determine if there is any invasion toward squamous cell carcinoma. Visual inspection can raise suspicion but cannot prove the diagnosis or distinguish AK from similar sun-damaged lesions or from skin cancer. Blood tests and MRI do not provide diagnostic information for this superficial skin condition.

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