Table of contents
Benign (nonmelanocytic) epidermal tumors or tumor-like lesions:acanthoma fissuratum (pending)
benign lichenoid keratosis (pending)
clear cell acanthoma
clear cell papulosis
dermatosis papulosa nigra
epidermal nevus
epidermolytic acanthoma
inflammatory linear verrucous epidermal nevus (ILVEN)
inverted follicular keratosis
large cell acanthoma
melanoacanthoma
nevus comedonicus (pending)
other benign keratoses (pending)
porokeratosis
pseudoepitheliomatous hyperplasia (pending)
seborrheic keratosis
warty dyskeratoma
Fibrous, fibrohistiocytic and myofibroblastic neoplasms:acquired digital fibrokeratoma
angiofibroma / fibrous papule
calcifying aponeurotic fibroma
cutaneous fibroepithelial polyps
desmoplastic fibroblastoma
dermatofibroma (cutaneous fibrous histiocytoma)
dermatofibrosarcoma protuberans (DFSP)
dermatomyofibroma
elastofibroma
EWSR1::SMAD3 positive fibroblastic tumor
inclusion body fibromatosis
Gardner fibroma
keloid
low grade fibromyxoid sarcoma
multinucleate cell angiohistiocytoma
myxofibrosarcoma
myxoinflammatory fibroblastic sarcoma
nuchal type fibroma
plaque-like CD34 positive dermal fibroma (pending)
pleomorphic fibroma
plexiform fibrous histiocytoma
sclerotic fibroma
superficial angiomyxoma
Cysts:auricular pseudocyst (pending)
benign (mature) cystic teratoma
cutaneous dental sinus (pending)
dermoid cyst
digital myxoid cyst
endometriosis
epidermoid / epidermal inclusion cyst
hidrocystoma
median raphe cyst (pending)
other cysts
steatocystoma
synovial cysts
thyroglossal duct cyst
trichilemmal (pilar) type
vellus hair cyst
Adnexal tumors
Sweat gland derived (apocrine & eccrine glands):adenocarcinoma of mammary-like glands of vulva
adenoid cystic carcinoma (primary cutaneous)
apocrine carcinoma (pending)
cutaneous adnexal NUT carcinoma
cutaneous mixed tumor / chondroid syringoma
cylindroma
digital papillary adenocarcinoma
spiradenoma
eccrine syringofibroadenoma
endocrine mucin producing sweat gland carcinoma
extramammary Paget disease
hidradenoma
hidradenocarcinoma (pending)
hidradenoma papilliferum
microcystic adnexal carcinoma
myoepithelioma
other cutaneous adnexal adenocarcinomas (pending)
papillary eccrine adenoma
polymorphous sweat gland carcinoma
porocarcinoma (pending)
poroma
primary cutaneous mucinous carcinoma
squamoid ductal eccrine carcinoma (pending)
syringocystadenoma papilliferum
syringoma
tubular apocrine adenoma
Follicular derived:basaloid follicular hamartoma
cutaneous lymphadenoma
dilated pore of Winer (pending)
fibrofolliculoma / trichodiscoma
hair follicle nevus
malignant follicular tumors (pending)
pilar sheath acanthoma (pending)
pilomatricoma
proliferating pilar cyst
trichoadenoma (pending)
trichilemmoma
trichoepithelioma / trichoblastoma
trichofolliculoma
tumor of the follicular infundibulum (pending)
Premalignant / in situ:actinic keratosis
arsenical keratosis
bowenoid papulosis
extramammary Paget disease
HPV associated SIL
HPV independent SIL
mammary Paget disease
penile intraepithelial neoplasia
squamous cell carcinoma in situ / Bowen disease
Carcinoma (nonadnexal):approach to cutaneous metastatic disease (pending)
basal cell carcinoma
cutaneous neuroendocrine carcinoma / Merkel cell carcinoma
keratoacanthoma / SCC keratoacanthoma type
lymphoepithelioma-like carcinoma
metastatic
mucoepidermoid carcinoma
squamous cell carcinoma
verrucous carcinoma
Lymphoma and related disorders (see also Lymphoma chapter):cutaneous lymphoid hyperplasia
Primary cutaneous B cell lymphoma (PCBCL):EBV+ mucocutaneous ulcer
intravascular
primary cutaneous diffuse large B cell lymphoma, leg type
primary cutaneous follicle center lymphoma
primary cutaneous marginal zone lymphoma / lymphoproliferative disorder
Cutaneous T cell lymphoma (CTCL):extranodal NK / T cell lymphoma
lymphomatoid papulosis
mycosis fungoides
mycosis fungoides special variants
primary cutaneous acral CD8+
primary cutaneous anaplastic large cell lymphoma
primary cutaneous CD4+ small / medium
primary cutaneous CD8+ aggressive epidermotropic T cell lymphoma
primary cutaneous gamma delta
primary cutaneous PTCL, NOS
Sézary syndrome
subcutaneous panniculitis-like
systemic EBV+ of childhood
Leukemic infiltrates of skin and cutaneous mastocytosis:blastic plasmacytoid dendritic cell neoplasm
cutaneous mastocytosis
leukemia cutis
myeloid sarcoma
Vascular tumors:angiokeratoma
angiosarcoma
atypical vascular lesion post radiation
benign lymphangioendothelioma / acquired progressive lymphangioma
composite hemangioendothelioma
cutaneous epithelioid angiomatous nodule
cystic / cavernous lymphangioma
epithelioid hemangioendothelioma
hemangioendothelioma-kaposiform
hemangioendothelioma-retiform
intravascular papillary endothelial hyperplasia
Kaposi sarcoma
lymphangioma / lymphatic malformation
papillary intralymphatic angioendothelioma
tufted angioma
Hemangioma variants:acquired elastotic hemangioma
angiolymphoid hyperplasia with eosinophilia
hemangioma & variants
glomus tumor
lobular capillary hemangioma
myopericytoma / myofibroma
Malformations, ectasias and hamartomas of vascular origin:arteriovenous malformation
capillary malformations (pending)
diffuse dermal angiomatosis
eccrine angiomatous hamartoma
reactive angioendotheliomatosis (pending)
telangiectases (pending)
venous lake
venous malformations
Neural tumors:dermal nerve sheath myxoma
epithelial sheath neuroma (pending)
granular cell tumor
malignant granular cell tumor
MPNST
neurofibroma
palisaded encapsulated neuroma
perineurioma
plexiform neurofibroma
schwannoma
Cutaneous muscle tumors & hamartomas:alveolar rhabdomyosarcoma
angioleiomyoma
atypical smooth muscle tumor
Becker's nevus
embryonal rhabdomyosarcoma
leiomyoma
pleomorphic rhabdomyosarcoma
Nail tumors:normal nail grossing (pending)
normal nail histology (pending)
onychocytic carcinoma (pending)
onychocytic matricoma (pending)
onychomatricoma (pending)
onychopapilloma (pending)
subungual exostosis
superficial acral fibromyxoma
Developmental anomalies and other hamartomas:accessory tragus and congenital cartilaginous rest of the neck (pending)
connective tissue nevus
meningothelial hamartoma of scalp
nasal glioma
nevus lipomatosus superficialis
preauricular sinus / pit (pending)
supernumerary digit
white sponge nevus
Tumors of uncertain lineage:angiomatoid fibrous histiocytoma
atypical fibroxanthoma
CRTC1::TRIM11 cutaneous tumor
dermal clear cell sarcoma
epithelioid fibrous histiocytoma (pending)
epithelioid sarcoma
cellular neurothekeoma
NTRK rearranged spindle cell neoplasm
PEComa (pending)
pleomorphic dermal sarcoma
superficial CD34+ fibroblastic tumor
Stains-Keratinocytic and adnexal neoplasms:
adipophilin (sebaceous neoplasms) (pending)
AE1 / AE3
BerEP4 (BCC)
CD10 (trichoepithelioma versus BCC)
CD34 (trichoepithelioma versus BCC)
CEA
CK5/6
CK7
CK20
EMA
PHLDA1 (trichoepithelioma versus BCC) (pending)
p40
p63
Stains-Spindle cell neoplasms: AE1 / AE3 ALK CD10 CD31 CD34 CD99 desmin ERG Factor XIIIa SMA vimentin
Melanocytic markers: HMB45 MelanA / MART1 MITF NGFR / p75 (pending) PRAME S100 SOX10
Stains-Specialized markers: BAP1 BRAF MLH1 MLH3 (pending) MSH2 MSH6 PMS2 p16
Stains-Spindle cell neoplasms: AE1 / AE3 ALK CD10 CD31 CD34 CD99 desmin ERG Factor XIIIa SMA vimentin
Melanocytic markers: HMB45 MelanA / MART1 MITF NGFR / p75 (pending) PRAME S100 SOX10
Stains-Specialized markers: BAP1 BRAF MLH1 MLH3 (pending) MSH2 MSH6 PMS2 p16
Index (Alphabetical table of contents)
A-E:acanthoma fissuratum (pending)
accessory tragus and congenital cartilaginous rest of the neck (pending)
acquired digital fibrokeratoma
acquired elastotic hemangioma
actinic keratosis
adenocarcinoma of mammary-like glands of vulva
adenoid cystic carcinoma (primary cutaneous)
ALK+ histiocytosis
alveolar rhabdomyosarcoma
angiofibroma / fibrous papule
angiokeratoma
angioleiomyoma
angiolymphoid hyperplasia with eosinophilia
angiomatoid fibrous histiocytoma
angiosarcoma
apocrine carcinoma (pending)
approach to cutaneous metastatic disease (pending)
arsenical keratosis
arteriovenous malformation
atypical fibroxanthoma
atypical smooth muscle tumor
atypical vascular lesion post radiation
auricular pseudocyst (pending)
basal cell carcinoma
basaloid follicular hamartoma
Becker's nevus
benign (mature) cystic teratoma
benign lichenoid keratosis (pending)
benign lymphangioendothelioma / acquired progressive lymphangioma
blastic plasmacytoid dendritic cell neoplasm
bowenoid papulosis
calcifying aponeurotic fibroma
capillary malformations (pending)
cellular neurothekeoma
clear cell acanthoma
clear cell papulosis
composite hemangioendothelioma
connective tissue nevus
CRTC1::TRIM11 cutaneous tumor
cutaneous adnexal NUT carcinoma
cutaneous dental sinus (pending)
cutaneous epithelioid angiomatous nodule
cutaneous fibroepithelial polyps
cutaneous lymphadenoma
cutaneous lymphoid hyperplasia
cutaneous mastocytosis
cutaneous mixed tumor / chondroid syringoma
cutaneous neuroendocrine carcinoma / Merkel cell carcinoma
cylindroma
cystic / cavernous lymphangioma
dermal clear cell sarcoma
dermal nerve sheath myxoma
dermatofibroma (cutaneous fibrous histiocytoma)
dermatofibrosarcoma protuberans (DFSP)
dermatomyofibroma
dermatosis papulosa nigra
dermoid cyst
desmoplastic fibroblastoma
diffuse dermal angiomatosis
digital myxoid cyst
digital papillary adenocarcinoma
dilated pore of Winer (pending)
EBV+ mucocutaneous ulcer
eccrine angiomatous hamartoma
eccrine syringofibroadenoma
elastofibroma
embryonal rhabdomyosarcoma
endocrine mucin producing sweat gland carcinoma
endometriosis
epidermal nevus
epidermoid / epidermal inclusion cyst
epidermolytic acanthoma
epithelial sheath neuroma (pending)
epithelioid fibrous histiocytoma (pending)
epithelioid hemangioendothelioma
epithelioid sarcoma
EWSR1::SMAD3 positive fibroblastic tumor
extramammary Paget disease
extranodal NK / T cell lymphoma
F-N:fibrofolliculoma / trichodiscoma
Gardner fibroma
glomus tumor
granular cell tumor
hair follicle nevus
hemangioendothelioma-kaposiform
hemangioendothelioma-retiform
hemangioma & variants
hidradenocarcinoma (pending)
hidradenoma
hidradenoma papilliferum
hidrocystoma
histiocytoses, overview (pending)
HPV associated SIL
HPV independent SIL
inclusion body fibromatosis
inflammatory linear verrucous epidermal nevus (ILVEN)
intravascular
intravascular papillary endothelial hyperplasia
inverted follicular keratosis
juvenile xanthogranuloma
Kaposi sarcoma
keloid
keratoacanthoma / SCC keratoacanthoma type
Langerhans cell histiocytosis
large cell acanthoma
leiomyoma
leukemia cutis
lobular capillary hemangioma
low grade fibromyxoid sarcoma
lymphangioma / lymphatic malformation
lymphoepithelioma-like carcinoma
lymphomatoid papulosis
malignant follicular tumors (pending)
malignant granular cell tumor
mammary Paget disease
median raphe cyst (pending)
melanoacanthoma
meningothelial hamartoma of scalp
metastatic
microcystic adnexal carcinoma
MPNST
mucoepidermoid carcinoma
multicentric reticulohistiocytosis
multinucleate cell angiohistiocytoma
mycosis fungoides
mycosis fungoides special variants
myeloid sarcoma
myoepithelioma
myopericytoma / myofibroma
myxofibrosarcoma
myxoinflammatory fibroblastic sarcoma
nasal glioma
necrobiotic xanthogranuloma (pending)
neurofibroma
nevus comedonicus (pending)
nevus lipomatosus superficialis
nevus sebaceus of Jadassohn
normal nail grossing (pending)
normal nail histology (pending)
NTRK rearranged spindle cell neoplasm
nuchal type fibroma
O-Z:onychocytic carcinoma (pending)
onychocytic matricoma (pending)
onychomatricoma (pending)
onychopapilloma (pending)
other benign keratoses (pending)
other cutaneous adnexal adenocarcinomas (pending)
other cysts
other histiocytoses (pending)
other tumors with sebaceous differentiation (pending)
palisaded encapsulated neuroma
papillary eccrine adenoma
papillary intralymphatic angioendothelioma
PEComa (pending)
penile intraepithelial neoplasia
perineurioma
pilar sheath acanthoma (pending)
pilomatricoma
plaque-like CD34 positive dermal fibroma (pending)
pleomorphic dermal sarcoma
pleomorphic fibroma
pleomorphic rhabdomyosarcoma
plexiform fibrous histiocytoma
plexiform neurofibroma
polymorphous sweat gland carcinoma
porocarcinoma (pending)
porokeratosis
poroma
preauricular sinus / pit (pending)
primary cutaneous acral CD8+
primary cutaneous anaplastic large cell lymphoma
primary cutaneous CD4+ small / medium
primary cutaneous CD8+ aggressive epidermotropic T cell lymphoma
primary cutaneous diffuse large B cell lymphoma, leg type
primary cutaneous follicle center lymphoma
primary cutaneous gamma delta
primary cutaneous marginal zone lymphoma / lymphoproliferative disorder
primary cutaneous mucinous carcinoma
primary cutaneous PTCL, NOS
proliferating pilar cyst
pseudoepitheliomatous hyperplasia (pending)
reactive angioendotheliomatosis (pending)
Rosai-Dorfman disease (RDD)
Sézary syndrome
schwannoma
sclerotic fibroma
sebaceoma
sebaceous adenoma
sebaceous carcinoma
sebaceous hyperplasia
seborrheic keratosis
spiradenoma
squamoid ductal eccrine carcinoma (pending)
squamous cell carcinoma
squamous cell carcinoma in situ / Bowen disease
staging-Merkel cell carcinoma
staging-nonmelanocytic carcinoma
steatocystoma
subcutaneous panniculitis-like
subungual exostosis
superficial acral fibromyxoma
superficial angiomyxoma
superficial CD34+ fibroblastic tumor
supernumerary digit
synovial cysts
syringocystadenoma papilliferum
syringoma
systemic EBV+ of childhood
telangiectases (pending)
thyroglossal duct cyst
trichilemmal (pilar) type
trichilemmoma
trichoadenoma (pending)
trichoepithelioma / trichoblastoma
trichofolliculoma
tubular apocrine adenoma
tufted angioma
tumor of the follicular infundibulum (pending)
vellus hair cyst
venous lake
venous malformations
verrucous carcinoma
warty dyskeratoma
white sponge nevus
WHO classification
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