D09.2

Clinical Causes: Exposure to ultraviolet (UV) radiation from sunlight or artificial sources Chronic irritation or inflammation of the eye History of outdoor work or activities with prolonged sun exposure Immunosuppression or weakened immune system Pre-existing ocular surface conditions, such as pterygium or conjunctivitis Use of certain chemical or environmental carcinogens History of HPV (human papillomavirus) infection

Key Symptoms: Persistent or recurrent redness in the eye Visible, slightly raised, or pigmented lesion on the conjunctiva Presence of a leukoplakic (white) or pigmented patch on the eye surface Discomfort or a sensation of foreign body in the eye Unexplained change in eye appearance Possible minor vision changes if the lesion enlarges or affects the cornea No symptoms in early stages; lesions may be noticed only during routine eye examinations

Diagnosis Path: Diagnosing carcinoma in situ of the eye involves a comprehensive eye examination by an ophthalmologist. The process typically includes visual inspection of the eye surface, especially the conjunctiva, for suspicious lesions. To confirm the diagnosis, a biopsy of the abnormal tissue is performed, where a small sample is taken and analyzed microscopically. Additional imaging tests, such as anterior segment optical coherence tomography (AS-OCT), may help assess the extent of the lesion and its depth. Early detection is critical for successful management, so routine eye examinations are essential, especially for individuals with risk factors.

Treatment Protocols: Treatment options for carcinoma in situ of the eye focus on removing or destroying abnormal cells to prevent progression to invasive disease. Common approaches include: - **Surgical Excision:** Complete removal of the lesion with clear margins to ensure all abnormal tissue is eliminated. - **Topical Chemotherapy:** Application of eye drops or gels containing chemotherapeutic agents like mitomycin C to destroy abnormal cells. - **Cryotherapy:** Use of extreme cold temperatures to target and destroy atypical tissue. - **Laser Therapy:** Precise application of laser energy to ablate affected areas. - **Photodynamic Therapy (PDT):** Use of light-activated drugs to selectively target abnormal cells. Follow-up care includes regular eye examinations to monitor for recurrence or progression, and managing any side effects or complications from treatment. The choice of treatment depends on the size, location, and extent of the lesion, as well as overall health and patient preferences.