DISEASE_INFO = {
    "Melanoma": {
        "Symptoms": "Dark, irregular patches that grow over time.",
        "Causes": "UV exposure, family history, fair skin.",
        "Treatments": "Surgical removal, immunotherapy, chemotherapy."
    },
    "Nevus": {
        "Symptoms": "Flat or raised brown mole, usually harmless.",
        "Causes": "Genetic factors, sun exposure.",
        "Treatments": "Usually none. Surgical removal if suspicious."
    },
    "BCC": {
        "Symptoms": "Waxy bump, flesh-colored or brown lesion.",
        "Causes": "Chronic sun exposure.",
        "Treatments": "Surgical excision, topical therapy, Mohs surgery."
    },
    "AK": {
        "Symptoms": "Scaly, crusty patches on sun-exposed skin.",
        "Causes": "Long-term sun damage.",
        "Treatments": "Cryotherapy, topical creams, photodynamic therapy."
    },
    "DF": {
        "Symptoms": "Small, firm nodule (usually on legs).",
        "Causes": "Unknown, may be reaction to minor skin injury.",
        "Treatments": "Observation, surgical removal if bothersome."
    },
    "Vascular": {
        "Symptoms": "Red/purple skin lesions, often from blood vessels.",
        "Causes": "Capillary malformation, aging, hormonal.",
        "Treatments": "Laser therapy, sclerotherapy."
    },
    "Other": {
        "Symptoms": "Varied and non-specific.",
        "Causes": "Miscellaneous or benign skin changes.",
        "Treatments": "Case-dependent."
    }
}