Introduction
Premalignant keratoses
Actinic keratosis
Arsenical keratosis
PUVA keratosis
Verrucae
Verruca vulgaris
Verruca plantaris
Verruca plana
Benign acanthomas/keratoses
Seborrhoeic keratosis
Solar lentigo
Lichenoid keratosis (discuss in EB)
Clear cell acanthoma
Large cell acanthoma
Warty dyskeratoma
Other benign keratoses
Basal cell carcinomas
Superficial basal cell carcinoma
Nodular basal cell carcinoma
Micronodular basal cell carcinoma
Infiltrating basal cell carcinoma
Sclerosing/morphoeic basal cell carcinoma
Basosquamous carcinoma
Basal cell carcinoma with sarcomatoid differentiation
Basal cell carcinoma with adnexal differentiation
Fibroepithelial basal cell carcinoma
Squamous cell carcinomas
Squamous cell carcinoma in situ (Bowen disease)
Keratoacanthoma
Verrucous carcinoma
Squamous cell carcinoma (expand)
Neuroendocrine carcinomas
Merkel cell carcinoma
Introduction
Genomic landscape of melanoma
Naevi
Junctional, compound, and dermal naevi
Simple lentigo and lentiginous melanocytic naevus
Dysplastic naevus
Naevus spilus
Special-site naevi (of the breast, axilla, scalp, and ear)
Halo naevus
Meyerson naevus
Recurrent naevus
Deep penetrating naevus and melanocytoma
Pigmented epithelioid melanocytoma
BAP-inactivated naevus
Combined naevus
Melanoma
Low-CSD melanoma (superficial spreading melanoma)
Melanoma
Lentigo maligna melanoma
Desmoplastic melanoma
Pigmented spindle cell naevus (Reed naevus)
Spitz naevus
Atypical Spitz tumour
Malignant Spitz tumour (Spitz melanoma)
Naevi
Acral naevus
Melanoma
Acral melanoma
Naevi
Melanosis
Genital naevus
Melanomas
Mucosal melanomas (genital, oral, sinonasal)
Naevi
Naevus of Ito and naevus of Ota
Mongolian spot
Blue naevus and cellular blue naevus
Melanomas
Melanoma arising in blue naevus
Naevi
Congenital melanocytic naevus
Proliferative nodules in congenital melanocytic naevus
Melanomas
Melanoma arising in giant congenital naevus
Conjunctival naevus (could split)
Conjunctival melanocytic intraepithelial neoplasia/primary acquired melanosis
Conjunctival melanoma
Melanocytoma
Uveal melanoma
CNS melanoma
Melanomas
Nodular melanoma
Naevoid melanoma
Dermal melanoma
Metastatic melanoma in the skin
Introduction
Benign tumours
Hidrocystoma/cystadenoma
Syringoma
Poroma
Syringofibroadenoma
Hidradenoma
Spiradenoma
Cylindroma
Tubular adenoma
Syringocystadenoma papilliferum
Mixed tumour
Myoepithelioma
Malignant tumours
Adnexal adenocarcinoma, NOS
Microcystic adnexal carcinoma
Porocarcinoma
NUT carcinoma
Malignant neoplasms arising from spiradenoma, cylindroma, or spiradenocylindroma
Malignant mixed tumour
Hidradenocarcinoma
Mucinous carcinoma
Endocrine mucin-producing sweat gland carcinoma
Digital papillary adenocarcinoma
Adenoid cystic carcinoma
Apocrine carcinoma
Adenosquamous carcinoma (may delete?)
Squamoid eccrine ductal carcinoma
Syringocystadenocarcinoma papilliferum
Secretory carcinoma
Cribriform carcinoma
Signet-ring cell/histiocytoid carcinoma
Benign tumours
Trichoblastoma
Pilomatricoma
Trichilemmoma
Trichofolliculoma
Pilar sheath acanthoma
Tumour of the follicular infundibulum
Melanocytic matricoma
Spindle cell–predominant trichodiscoma
Malignant tumours
Pilomatrical carcinoma
Proliferating trichilemmal tumour
Trichoblastic carcinoma/carcinosarcoma
Trichilemmal carcinoma
Benign tumours
Sebaceoma
Sebaceous adenoma
Malignant tumours
Sebaceous carcinoma
Benign tumours
Hidradenoma papilliferum
Fibroadenoma and phyllodes tumour of anogenital mammary-like glands
Malignant tumours
Mammary Paget disease
Extramammary Paget disease
Adenocarcinoma of anogenital mammary-like glands
Onychopapilloma
Onychomatricoma (this is a fibroepithelial lesion)
Subugual keratoacathoma
Squamous cell carcinoma of the nail
Ungual fibrokeratoma and fibroma
Introduction
Mastocytosis
Cutaneous mastocytosis
Systemic mastocytosis
Mast cell sarcoma
Secondary cutaneous involvement in myeloid neoplasms
Cutaneous involvement in myeloid leukaemia - Rename: Myeloid sarcoma?
Plasmacytoid dendritic cell neoplasms
Mature plasmacytoid dendritic cell proliferation
Blastic plasmacytoid dendritic cell neoplasm
Langerhans cell neoplasms
Langerhans cell histiocytosis
Histiocytic neoplasms
Juvenile xanthogranuloma
Erdheim-Chester disease
Rosai-Dorfman Disease
ALK related histiocytosis
Reticulohistiocytosis
Histiocytic sarcoma
Interdigitating dendritic cell neoplasms
Indeterminate dendritic cell tumour
Reactive B-cell rich lymphoid proliferations
Primary cutaneous mature B cell neoplasms
B-cell pseudolymphoma
Primary cutaneous marginal zone (MALT) lymphoma
Primary cutaneous follicle centre lymphoma
Primary cutaneous diffuse large B-cell lymphoma, leg type
Intravascular large B-cell lymphoma
EBV-positive mucocutaneous ulcer
Cutaneous involvement in primarily extracutaneous B-cell lymphomas and leukaemias
Mantle cell lymphoma
Burkitt lymphoma
Chronic lymphocytic leukaemia/small lymphocytic lymphoma
B-lymphoblastic leukaemia/lymphoma
Secondary lymphomatoid granulomatosis
Reactive T-cell and NK-cell rich lymphoid proliferations
Primary cutaneous T cell disorders
Primary cutaneous CD+ small or medium T-cell lymphoproliferative disorder
Mycosis fungoides
Primary cutaneous CD+ T-cell lymphoproliferative disorder: Lymphomatoid papulosis
ALCL
Primary cutaneous CD+ T-cell lymphoproliferative disorder: Primary cutaneous anaplastic large cell lymphoma
Subcutaneous panniculitis-like T-cell lymphoma
Primary cutaneous gamma/delta T-cell lymphoma
Primary cutaneous CD-positive aggressive epidermotropic cytotoxic T-cell lymphoma (provisional)
Primary cutaneous acral CD-positive T-cell lymphoma
Primary cutaneous T-cell lymphoma, NOS
Sezary syndrome
EBV-positive lymphoproliferative diseases of childhood
Severe mosquito bite allergy
Hydroa vacciniforme-like lymphoproliferative disorder
Secondary cutaneous involvement in T-cell lymphomas and leukaemias
Systemic anaplastic large cell lymphoma
Angioimmunoblastic T-cell lymphoma
T-cell prolymphocytic leukaemia
T-lymphoblastic leukaemia/lymphoma
Extranodal NK/T-cell lymphoma
Others
Adult T cell leukaemia/lymphoma
Primary immunodeficiency-associated lymphoproliferative disorders
Introduction
Naevus lipomatosus superficialis
Lipoma
Angiolipoma
Spindle cell/pleomorphic lipoma
Atypical lipomatous tumour
Pleomorphic liposarcoma
Benign neoplasms
Fibromas
Fibrous papule family
Fibroblastic connective tissue nevus
Fibroosseous pseudotumor of digits and myositis ossificans
Dermatofibroma (fibrous histiocytoma) and variants
Superficial fibromatosis
Inclusion body fibromatosis
Plexiform fibrohistiocytic tumour
Superficial acral fibromyxoma
Cutaneous myxoma
Dermatomyofibroma
Multinucleate angiohistiocytoma
Plaque-like CD+ dermal fibroma
Nodular fasciitis
Malignant neoplasms
Dermatofibrosarcoma protuberans and variants
Myxoinflammatory fibroblastic sarcoma
EWSR-SMAD rearranged fibroblastic tumour (provisional)
Haemangiomas
Cherry haemangioma
Sinusoidal haemangioma
Microvenular haemangioma
Hobnail haemangioma
Glomeruloid haemangioma
Papillary haemangioma
Spindle cell haemangioma
Epithelioid haemangioma
Tufted haemangioma
Angiokeratoma
Infantile haemangioma
Congenital non-progressive haemangiomas: rapidly involuting congenital haemangioma and non-involuting congenital haemangioma
Lobular capillary haemangioma
Poikilodermatous plaque-like haemangioma
Acquired elastic haemangioma
Verrucous venous malformation
Arteriovenous malformation
Other benign vascular tumours
Lymphangioma (superficial lymphatic malformation)
Cutaneous epithelioid angiomatous nodule
Atypical vascular lesion
Haemangioendothelioma family
Kaposi sarcoma
Malignant vascular sarcomas
Cutaneous angiosarcoma
Benign neoplasms
Glomus tumour and variants
Myopericytoma (including myofibroma and myofibromatosis)
Angioleiomyoma
Benign neoplasms
Smooth muscle hamartoma
Cutaneous leiomyomas and variants
EBV-associated smooth muscle tumour
Malignant neoplasms
Cutaneous leiomyosarcoma (atypical smooth muscle tumour)
Benign neoplasms
Neurofibroma and subtypes
Solitary circumscribed neuroma
Dermal nerve sheath myxoma
Perineurioma
Granular cell tumour
Schwannoma
Hybrid nerve sheath tumours
Dermal hyperneury/Epithelial sheath neuroma
Malignant neoplasms
Malignant peripheral nerve sheath tumour
Benign neoplasms
Cellular neurothekeoma
Epithelioid fibrous histiocytoma
PEComa
Angiomatoid fibrous histiocytoma
Lipofibromatosis-like neural tumour / NTRK-rearranged spindle cell neoplasm (provisional)
Atypical fibroxanthoma and subtypes
Non-neural granular cell tumour
Malignant neoplasms
Pleomorphic dermal sarcoma
Myxofibrosarcoma
Epithelioid sarcoma
Superficial CD+ fibroblastic tumour / PRDM-rearranged soft tissue tumour
TRIM melanocytoma
Dermal clear cell sarcoma
Ewing sarcoma
Pseudomyogenic haemangioendothelioma
Metastases to skin
Introduction
Familial melanoma
BAP tumour predisposition syndrome
Xeroderma pigmentosum
Naevoid basal cell carcinoma syndrome (Gorlin syndrome)
Carney complex
Muir-Torre syndrome
Brooke-Spiegler and related syndromes