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WHO Classification of Tumours
WHO Classification of Skin Tumours
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LeBoit PE, Burg G, Weedon D, Sarasin A (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Skin Tumours
3rd Edition
IARC Press: Lyon 2005

C44 - Skin:
The number attached to each tumour is the ICD-O morphology code of the International Classification of Diseases for Oncology (ICD-O) [1] and the Systematized Nomenclature of Medicine (http://snomed.org).
/0 benign tumours
/1 unspecified, borderline or uncertain behaviour
/2 in situ carcinomas
/3 malignant tumours.

1. Fritz A, Percy C, Jack A, Shanmuragatnam K, Sobin LH, Parkin DM, Whelan S (Eds) International Classification of Diseases for Oncology. World Health Organization: Geneva 2000

Keratinocytic tumours
    8090/3 Basal cell carcinoma, NOS
        8091/3 Multifocal superficial basal cell carcinoma
        8097/3 Basal cell carcinoma, nodular
        8090/3 Micronodular basal cell carcinoma
        8092/3 Infiltrating basal cell carcinoma, NOS
        8093/3 Basal cell carcinoma, fibroepithelial
        8098/3 Adenoid basal carcinoma
        8094/3 Basosquamous carcinoma
        8090/3 Keratotic basal cell carcinoma
    8070/3 Squamous cell carcinoma, NOS
        8075/3 Acantholytic squamous cell carcinoma,
        8074/3 Squamous cell carcinoma, spindle cell
        8051/3 Verrucous carcinoma, NOS
        8075/3 Pseudovascular squamous cell carcinoma
        8560/3 Adenosquamous carcinoma
    8081/2 Bowen disease
    Actinic keratosis
         Arsenical keratosis
         PUVA keratosis
         Verruca vulgaris
         Verruca plantaris
         Verruca plana
        8071/1 Keratoacanthoma

Melanocytic tumours
    8720/3 Melanoma, NOS
    8743/3 Superficial spreading melanoma
    8721/3 Nodular melanoma
    8742/2 Lentigo maligna
    8744/3 Acral lentiginous melanoma, malignant
    8745/3 Desmoplastic melanoma, malignant
    8780/3 Blue nevus, malignant
    8761/3 Malignant melanoma in giant pigmented nevus
    8720/3 Nevoid melanoma
    8720/3 Persistent melanoma
    Congenital melanocytic naevi
        8761/0 Superficial congenital melanocytic nevus
        8762/1 Proliferative nodules in congenital melanocytic nevus
        8780/0 Blue nevus, NOS
             Mongolian spot
             Naevus of Ito and Ota
            8790/0 Cellular blue nevus
             Deep penetrating naevus
         Combined naevus
         Melanotic macules
         Simple lentigo / lentiginous melanocytic naevus
        8727/0 Dysplastic nevus
         Site-specific naevi
             Acral naevus
             Genital naevus
         Meyerson naevus
        8770/0 Spitz nevus
        8770/0 Pigmented spindle cell nevus of Reed
        8723/0 Halo nevus

Appendageal tumours
    Malignant tumours with apocrine and eccrine differentiation
        8211/3 Tubular adenocarcinoma
        8407/3 Microcystic adnexal carcinoma
        8409/3 Porocarcinoma
        8403/3 Spiradenocarcinoma
        8940/3 Mixed tumor, malignant, NOS
        8400/3 Sweat gland adenocarcinoma
        8480/3 Mucinous adenocarcinoma
        8408/3 Eccrine papillary adenocarcinoma
        8200/3 Adenoid cystic carcinoma
        8401/3 Apocrine adenocarcinoma
        8540/3 Paget disease, mammary
        8542/3 Paget disease, extramammary

    Benign tumours with apocrine and eccrine differentiation
        8404/0 Hidrocystoma
        8407/0 Syringoma, NOS
        8409/0 Eccrine poroma
        8392/0 Syringofibroadenoma
        8402/0 Nodular hidradenoma
        8403/0 Eccrine spiradenoma
        8200/0 Eccrine dermal cylindroma
        8211/0 Tubular adenoma, NOS
        8263/0 Tubulovillous adenoma, NOS
        8406/0 Papillary syringadenoma
        8405/0 Papillary hidradenoma
        8940/0 Pleomorphic adenoma

    Tumours with follicular differentiation
        8110/3 Pilomatrix carcinoma
        8103/1 Proliferating tricholemmal tumor
        8100/0 Trichoepithelioma
        8110/0 Pilomatrixoma, NOS
        8102/0 Tricholemmoma
        8101/0 Trichofolliculoma
        8391/0 Follicular fibroma

    Tumours with sebaceous differentiation
        8410/3 Sebaceous adenocarcinoma
        8410/0 Sebaceous adenoma
        8410/0 Sebaceoma
        8410/0 Cystic sebaceous tumour

Cutaneous lymphomas
    Mature T-cell and NK-cell neoplasms
        9700/3 Mycosis fungoides
        9701/3 SÚzary syndrome
        9708/3 Subcutaneous panniculitis-like T-cell lymphoma
        9718/3 Primary cutaneous anaplastic large cell lymphoma
        9718/1 Lymphomatoid papulosis
        9709/3 Primary cutaneous CD8 positive aggressive epidermotropic cytotoxic T-cell lymphoma
        9709/3 Primary cutaneous CD4 positive small/medium T-cell lymphoma
        9726/3 Primary cutaneous gamma-delta T-cell lymphoma
        9719/3 Extranodal NK/T cell lymphoma, nasal type
        9725/3 Hydroa vacciniforme-like lymphoma
        9705/3 Angioimmunoblastic T-cell lymphoma

    Mature B-Cell neoplasms
        9699/3 Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma)
        9597/3 Primary cutaneous follicle centre lymphoma
        9680/3 Primary cutaneous DLBCL, leg type

    Immature haematopoietic malignancy
        9727/3 Blastic plasmacytoid dendritic cell neoplasm

Soft tissue tumours
    Vascular tumours
        9131/0 Capillary hemangioma
        9120/0 Hemangioma, NOS
        9136/1 Spindle cell hemangioendothelioma
        9161/0 Tufted angioma
        9123/0 Racemose hemangioma

    Lymphatic tumours
        9170/0 Lymphangioma circumscriptum
        9170/0 Progressive lymphangioma

    Smooth and skeletal muscle tumours
        8890/0 Leiomyoma, NOS
        8890/3 Leiomyosarcoma, NOS

    Fibrous, fibrohistiocytic and histiocytic tumours
        8824/0 Myofibroma
        8824/1 Myofibromatosis
        8823/0 Sclerotic fibroma
        8834/1 Giant cell fibroblastoma
        8832/3 Dermatofibrosarcoma, NOS
        8832/0 Dermatofibroma, NOS