Skin Cancer Detector

Actinic Keratoses (Solar Keratoses) and Intraepithelial Carcinoma (Bowen’s disease) are common non-invasive variants of squamous cell carcinoma that can be treated locally without surgery. Some authors regard them as precursors of squamous cell carcinomas rather than actual carcinomas, though there is agreement that these lesions may progress to invasive squamous cell carcinoma, which is usually not pigmented. Both neoplasms commonly show surface scaling and are often devoid of pigment. Actinic keratoses are more common on the face; Bowen’s disease is more common on other body sites.

Basal cell carcinoma is a common variant of epithelial skin cancer that rarely metastasizes but grows destructively if untreated. It appears in different morphologic variants: flat, nodular, pigmented, and cystic.

"Benign keratosis" is a generic class that includes seborrheic keratoses ("senile wart"), solar lentigo — a flat variant of seborrheic keratosis — and lichen-planus like keratoses, which resemble a seborrheic keratosis or solar lentigo with inflammation and regression. These subgroups can look different dermatoscopically but are grouped together for being similar biologically and often reported under the same generic term histopathologically.

Dermatofibroma is a benign skin lesion regarded as either a benign proliferation or an inflammatory reaction to minimal trauma. The most common dermatoscopic presentation is reticular lines at the periphery with a central white patch denoting fibrosis.

Melanocytic nevi, usually called "moles", are benign neoplasms of melanocytes that appear in a myriad of variants. In contrast to melanoma, they are usually symmetric with regard to the distribution of color and structure.

Melanoma is a malignant neoplasm derived from melanocytes that may appear in different variants. If excised at an early stage, it can be cured by simple surgical excision. Melanomas can be invasive or non-invasive (in situ), and are usually, though not always, chaotic in appearance.

Vascular skin lesions in the dataset range from cherry angiomas to angiokeratomas and pyogenic granulomas; hemorrhage is also included in this category. Angiomas are dermatoscopically characterized by red or purple color and solid, well-circumscribed structures known as red clods or lacunes.