D04.122

Clinical Causes: Prolonged or excessive exposure to ultraviolet (UV) rays from the sun or tanning beds Fair skin that is more vulnerable to UV damage Chronic skin irritation or injury Age-related changes in skin, with increased risk in older adults History of skin cancer or precancerous skin lesions Weakened immune system, which reduces the body’s ability to repair damaged skin cells

Key Symptoms: Persistent, scaly, or crusted patch on the eyelid that may be pink, red, or skin-colored A lesion or sore that does not heal over time Raised or rough areas on the eyelid surface A new growth or wart-like appearance on the eyelid Possible slight bleeding or tenderness in the affected area Pigmented or non-pigmented patches that may vary in color

Diagnosis Path: The diagnosis of carcinoma in situ of the eyelid typically involves a thorough physical examination by a healthcare professional, focusing on the skin lesion. A biopsy is usually performed, where a small sample of the affected tissue is removed and examined microscopically to confirm the presence of carcinoma in situ. Additional imaging or tests may be used if invasion or spread to nearby tissues is suspected, but in early stages, biopsy remains the primary diagnostic tool.

Treatment Protocols: Surgical excision—cutting out the lesion with clear margins Mohs micrographic surgery—precise removal with microscopic examination during the procedure for tissue preservation Cryotherapy—freezing the lesion with liquid nitrogen to destroy abnormal cells Topical medications—such as 5-fluorouracil or imiquimod creams, used in superficial cases Photodynamic therapy—using light-activated drugs to target abnormal cells Regular follow-up to monitor for recurrence or progression