and neck 38.3% (𝑛 = 2515), the anterior and lateral tegument 14.3% (𝑛 = 941), the posterior tegument 12.3% (𝑛 = 810), the pelvis 6.9% (𝑛 = 454), the upper extremities 11.1% (𝑛 = 729), and the lower extremities 17.1% (𝑛 = 1124). Out of 6573 valid biopsy sites (𝑛 = 243 missing) the most common specific locations were the back 8.8% (𝑛 = 579), the scalp 5.9% (𝑛 = 387), the nose 3.3% (𝑛 = 218), and the abdomen 3.3% (𝑛 = 217). After performing the chi-square test, the differences in the frequencies were found statistically significant (𝜒2 = 2434.521, 𝑃 < 0.001). 3.3. Clinical Diagnoses. In order to study the clinical diagnoses that were proposed by the dermatologists, 6733 out of 6816 biopsies (98.78%) were evaluated. There were 11194 valid specific diagnoses, divided in 367 different terms of skin diseases, after excluding clinical descriptions and intangible expressions (12579 in total, 13 of which referring to different tissue other than skin), producing a ratio of 1.66 proposed diagnoses per skin biopsy. No diagnosis at all was given in 𝑛 = 158 cases (2.4%). A classification of 14 categories of all clinical diagnoses is presented in Figure 1. The respective frequencies were “malignant tumors” 𝑛 = 2158 (19.28%), “papulosquamous dermatoses” 𝑛 = 1358 (12.13%), and “nevi” 𝑛 = 1176 (10.51%) including melanocytic nevi, congenital nevi, Spitz nevi, blue nevi, dysplastic nevi, junctional-compoundintradermal nevi, nonmelanocytic nevi, and epidermal nevi, all expressed forms of “dermatitis” 𝑛 = 941 (8.4%) including dermatitis, contact dermatitis, acute or chronic dermatitis, dyshidrotic eczema, nummular eczema, atopic dermatitis, and seborrheic dermatitis; also, “connective tissue diseases” 𝑛 = 803 (7.17%), noninfectious granulomas and “granulomatous diseases” 𝑛 = 389 (3.48%), “immunobullous diseases” 𝑛 = 376 (3.36%), “cutaneous infections” 𝑛 = 351 (3.14%), “benign tumors” 𝑛 = 344 (3.07%), “drug eruptions” 𝑛 = 314 (2.8%), “vasculitides” 𝑛 = 230 (2.06%), acne and “acneiform eruptions” 𝑛 = 119 (1.06%), hemangiomas and “vascular malformations” 𝑛 = 118 (1.05%), and miscellaneous dermatoses 𝑛 = 2517 (22.49%). After applying the chi-square test, the differences in the frequencies were found statistically significant (𝜒2 = 9396.640, 𝑃 < 0.001). Out of the 367 different clinical expressions, the most common specific diagnoses were “basal cell carcinoma 19.28% 22.49% Drug eruptions Cutaneous infections Dermatitis Papulosquamous Connective tissue Vasculitides Granulomatous Vascular Immunobullous Acneiform eruptions Nevi Benign tumors Malignant tumors dermatoses Miscellaneous diseases diseases malformations diseases 2000 Figure 1: Bar chart of a classification of all the proposed clinical diagnoses. 1400 Dermatitis Immunobullous diseases Papulosquamous dermatoses Cutaneous infections Drug eruptions and urticaria Cutaneous vasculitides Connective tissue diseases Noninfectious granulomas Conditions of the skin appendages Benign tumors and cysts Malignant melanomas Epitheliomas Other malignancies Melanocytic nevi Premalignant skin lesions Miscellaneous and acneiform eruptions Figure 2: Bar chart of a classification of all the suggested histological diagnoses. (𝑛 = 1037), “melanocytic nevus” 7.9% (𝑛 = 880), “dermatitis” 6.1% (𝑛 = 685), “plaque psoriasis” 4.6% (𝑛 = 515), and “squamous cell carcinoma” 3.9% (𝑛 = 436). 3.4. Histological Diagnoses. The study of the histological diagnoses that were produced by the dermatopathologists included 6720 skin biopsies (6733 in total, excluding 13 other than skin) and their distinctive pathology that were previously diagnosed clinically by the dermatologists. Five thousand five hundred and ninety-seven (5597) specific histological diagnoses were suggested (83.29%), divided in 259 different terms of skin diseases. A classification of 16 categories of all histological diagnoses is presented in Figure 2. The frequencies and percentages were “epitheliomas” 𝑛 = 1224 (21.9%) comprising basal cell carcinoma,