The BCN20000 dataset consists of dermoscopic images of skin lesions taken between 2010 and 2016 at the Hospital Clínic in Barcelona. It aims to tackle the challenge of classifying dermoscopic images of skin cancer under diverse conditions, including lesions in challenging locations (such as nails and mucosa), large lesions exceeding the dermoscopy device's aperture, and hypo-pigmented lesions. A detailed data descriptor is available: Hernández-Pérez, C., Combalia, M., Podlipnik, S. et al. BCN20000: Dermoscopic Lesions in the Wild. Sci Data 11, 641 (2024). https://doi.org/10.1038/s41597-024-03387-w

Dermatoscopic images of the most common classes of pigmented skin lesions: Pigmented Actinic Keratoses / Bowen's disease, Basal Cell Carcinoma, Benign Keratoses (Seborrheic Keratosis, Solar Lentigo and Lichen-Planus Like Keratosis), Dermatofibroma, Melanocytic Nevi, Melanoma and Vascular lesions. Images are made available in preparation for the "Human-Against-Machine with 10000 training images" study, and originate mainly from the ViDIR Group (Department of Dermatology, Medical University of Vienna) and a skin cancer office in Australia (School of Medicine, University of Queensland). Data is provided under the CC BY-NC 4.0 license, attribution should be made by referencing the data descriptor manuscript: Tschandl, P., Rosendahl, C. & Kittler, H. The HAM10000 dataset, a large collection of multi-source dermatoscopic images of common pigmented skin lesions. Sci. Data 5, 180161 doi:10.1038/sdata.2018.161 (2018).

Assorted images and lesions, mostly nevi and basal cell carcinomas. These images were found based on a search not filtered for any particular pathology. All diagnoses confirmed by histopathology.

Both benign and malignant melanocytic lesions. Almost all diagnoses were confirmed by histopathology reports; the remainder consists of benign lesions confirmed by clinical follow-up. Images were not taken with modern digital cameras.

Seborrheic keratoses obtained from patients during a clinical visit. These lesions were not biopsied and were determined to be seborrheic keratoses by agreement of three experts.

Images found based on a search for patients with a personal history, clinical diagnosis, or differential diagnosis of melanoma. All diagnoses confirmed by histopathology.

Biopsy-confirmed melanocytic and non-melanocytic skin lesions. This dataset includes over 500 melanomas. Many images have polarized and contact variants.

Moles and melanomas. Biopsy-confirmed melanocytic lesions. Both malignant and benign lesions are included.

Moles and melanomas. Biopsy-confirmed melanocytic lesions. Both malignant and benign lesions are included.