General: approach to diagnosis architectural patterns books cell types grading histology-blood vessels histology-skeletal muscle molecular sarcomas-general staging-general staging-abdomen and thorax staging-GIST staging-head and neck staging-retroperitoneum staging-trunk and extremities staging-unusual sites syndromes WHO classification (pending)

Infections, inflammation and hematoma: general granulomatous hematoma necrotizing fasciitis PVP granuloma tumoral calcinosis

Tumors
Adipose tissue: embryology & physiology white fat brown fat
lipoma and variants: lipoma angiolipoma chondroid lipoma fibrolipoma intramuscular lipoma myelolipoma myolipoma myxoid lipoma spindle cell / pleomorphic
other benign lesions: hibernoma lipoblastoma / lipoblastomatosis lipoma arborescens lipomatosis lipomatosis of nerve multiple symmetric lipomatosis pelvic lipomatosis subconjunctival herniated orbital fat
liposarcoma: atypical lipomatous tumor / well differentiated liposarcoma atypical spindle cell / pleomorphic lipomatous tumor (pending) dedifferentiated liposarcoma myxoid liposarcoma myxoid pleomorphic liposarcoma (pending) pleomorphic liposarcoma

Extraskeletal bone tumors: aneurysmal bone cyst chondroma chondrosarcoma (mesenchymal myxoid)  chordoma Ewing/PNET osteosarcoma parachordoma

Fibroblastic / myofibroblastic: fibroblastic/myofibroblastic - normal angiofibroma (variant: cellular) angiomyofibroblastoma calcifying aponeurotic fibroma calcifying fibrous tumor dermatofibrosarcoma protuberans (DFSP) (variants: myxoid myoid (pending) pigmented (pending) pleomorphic (pending))  desmoplastic fibroblastoma elastofibroma eosinophilic fasciitis EWSR1-SMAD3 rearranged fibroma of tendon sheath fibro-osseous pseudotumor of digits (pending) fibrous hamartoma of infancy focal myositis Gardner fibroma giant cell fibroblastoma inflammatory myofibroblastic tumor intranodal palisaded myofibroblastoma ischemic fasciitis mammary type myofibroblastoma myositis ossificans nodular fasciitis nuchal fibrocartilaginous pseudotumor nuchal type fibroma ossifying fibromyxoid tumor pleomorphic fibroma proliferative fasciitis proliferative myositis solitary fibrous tumor superficial acral fibromyxoma superficial CD34+ fibroblastic tumor (pending)
fibromatosis: general desmoid fibromatosis fibromatosis colli inclusion body fibromatosis juvenile hyaline fibromatosis lipofibromatosis palmar/plantar fibromatosis
fibrosarcoma: adult fibrosarcoma infantile fibrosarcoma low grade fibromyxoid sarcoma low grade myofibroblastic sarcoma myxofibrosarcoma myxoinflammatory fibroblastic sarcoma sclerosing epithelioid fibrosarcoma

Fibrohistiocytic: general
benign fibrous histiocytoma and variants: fibrous histiocytoma (variants: aneurysmal atypical cellular deep epithelioid hemosiderotic (pending) lipidized (pending) others (pending)
other benign lesions: giant cell tumor of soft tissue plexiform fibrohistiocytic tumor tenosynovial giant cell tumor (pending) (variants: localized diffuse)
malignant: undifferentiated / unclassified sarcoma

Peripheral nerve:
neurofibroma: general plexiform neurofibromatosis type 1 neurofibromatosis type 2
other benign: benign triton tumor (pending) ectopic meningioma (pending) hybrid nerve sheath tumor (pending) normal dermal nerve sheath myxoma granular cell tumor neuroma perineurioma pigmented neuroectodermal tumor of infancy schwannoma (ancient cellular microcystic / reticular plexiform) solitary circumscribed neuroma (pending)
malignant: malignant melanotic nerve sheath tumor (pending) malignant peripheral nerve sheath tumor (MPNST) (epithelioid malignant triton) 

Skeletal Muscle: ectomesenchymoma neuromuscular hamartoma
rhabdomyoma: adult fetal genital
rhabdomyosarcoma: general alveolar embryonal pleomorphic spindle cell / sclerosing

Smooth Muscle: general EBV associated smooth muscle tumor
leiomyoma: general cutaneous deep soft tissue
leiomyosarcoma: general inflammatory (pending)

Vascular:
Nonneoplastic: arteriovenous malformation / hemangioma (pending) bacillary angiomatosis papillary endothelial hyperplasia radiation associated cutaneous atypical vascular lesion
Benign: anastomosing hemangioma capillary hemangioma cavernous hemangioma epithelioid hemangioma hemangioma and variants intramuscular angioma littoral cell hemangioma of spleen lymphangioma / lymphangiomatosis / cystic lymphangioendothelioma synovial hemangioma venous hemangioma
Cutaneous hemangiomas: capillary / pyogenic granuloma cavernous glomeruloid hobnail microvenular spindle cell verrucous
Intermediate (locally aggressive / rarely metastasizing): composite hemangioendothelioma Kaposiform hemangioendothelioma / acquired tufted angioma Kaposi sarcoma papillary intralymphatic angioendothelioma pseudomyogenic hemangioendothelioma retiform hemangioendothelioma
Malignant: epithelioid hemangioendothelioma angiosarcoma

Pericytic (perivascular): angioleiomyoma glomus myofibroma / myofibromatosis myopericytoma

Uncertain differentiation: alveolar soft part sarcoma angiomatoid fibrous histiocytoma clear cell sarcoma desmoplastic small round cell tumor epithelioid sarcoma extrarenal rhabdoid tumor intimal sarcoma metastases myoepithelioma/myoepithelial carcinoma/mixed tumor myospherulosis myxoma PEComa PHAT phosphaturic mesenchymal tumor sinus histiocytosis with massive lymphadenopathy synovial sarcoma teratoma

Soft tissue stains: brachyury caldesmon CDK4 D2-40 desmin DOG1 ERG FLI1 GLUT1 KIT / CD117 MDM2 MUC4 myogenin NKX2 SMARCA4 SMARCB1 (pending) SMA STAT6 TFE3 TLE1

Superpages: entire chapter images virtual slides


Index (Alphabetical Table of Contents)
A-E: acquired tufted angioma adipose: embryology & physiology alveolar soft part sarcoma anastomosing hemangioma aneurysmal BFH angiofibroma angioleiomyoma angiolipoma angiomatoid BFH angiomyofibroblastoma angiosarcoma approach to diagnosis architectural patterns atypical BFH atypical lipomatous tumor / well differentiated liposarcoma bacillary angiomatosis books brown fat calcifying aponeurotic fibroma calcifying fibrous tumor capillary hemangioma capillary / pyogenic granuloma cavernous hemangioma (skin) cavernous hemangioma cell types cellular angiofibroma cellular BFH chondroid lipoma clear cell sarcoma composite hemangioendothelioma dedifferentiated liposarcoma deep benign fibrous histiocytoma dermatofibrosarcoma protuberans dermatofibrosarcoma protuberans - myxoid variant desmoplastic fibroblastoma desmoplastic small round cell tumor EBV associated smooth muscle tumor ectomesenchymoma elastofibroma eosinophilic fasciitis epithelioid BFH epithelioid hemangioendothelioma epithelioid hemangioma epithelioid sarcoma EWSR1-SMAD3 rearranged extrarenal rhabdoid tumor extraskeletal aneurysmal bone cyst extraskeletal chondroma extraskeletal chondrosarcoma extraskeletal chondrosarcoma - mesenchymal extraskeletal chondrosarcoma - myxoid extraskeletal chordoma extraskeletal Ewing/PNET extraskeletal osteosarcoma

F-J: fibroblastic/myofibroblastic - normal fibrohistiocytic-general fibrolipoma fibroma of tendon sheath fibromatosis colli fibromatosis-desmoid fibromatosis-general fibromatosis-palmar/plantar fibrosarcoma-adult fibrosarcoma-infantile fibrous hamartoma of infancy fibrous histiocytoma focal myositis Gardner fibroma giant cell fibroblastoma giant cell tumor of soft tissue glomeruloid hemangioma glomus grading granular cell tumor granulomatous hemangioma and variants hematoma hibernoma histology-blood vessels histology-skeletal muscle hobnail hemangioma inclusion body fibromatosis infections-general inflammatory myofibroblastic tumor intimal sarcoma intramuscular angioma intramuscular lipoma intranodal palisaded myofibroblastoma ischemic fasciitis juvenile hyaline fibromatosis

K-O: Kaposi sarcoma Kaposiform hemangioendothelioma leiomyoma-cutaneous leiomyoma-deep soft tissue leiomyoma-general leiomyosarcoma-general lipoblastoma / lipoblastomatosis lipofibromatosis lipoma lipoma arborescens lipomatosis lipomatosis of nerve littoral cell hemangioma of spleen low grade fibromyxoid sarcoma low grade myofibroblastic sarcoma lymphangioma-general lymphangioma-cystic lymphangiomatosis lymphangioendothelioma mammary type myofibroblastoma metastases microvenular hemangioma molecular malignant peripheral nerve sheath tumor (MPNST) MPNST - epithelioid MPNST - malignant triton multiple symmetric lipomatosis myelolipoma myoepithelioma/myoepithelial carcinoma/mixed tumor myofibroma / myofibromatosis myolipoma myopericytoma myositis ossificans myospherulosis myxofibrosarcoma myxoid lipoma myxoid liposarcoma myxoinflammatory fibroblastic sarcoma myxoma necrotizing fasciitis nerves-normal dermal nerve sheath myxoma neurofibroma-general neurofibroma-plexiform neuroma neuromuscular hamartoma nodular fasciitis and related lesions nuchal fibrocartilaginous pseudotumor nuchal type fibroma ossifying fibromyxoid tumor

P-Z: papillary endothelial hyperplasia papillary intralymphatic angioendothelioma parachordoma PEComa pelvic lipomatosis perineurioma pigmented neuroectodermal tumor of infancy pleomorphic fibroma pleomorphic hyalinizing angiectatic tumor pleomorphic liposarcoma plexiform fibrohistiocytic tumor proliferative fasciitis proliferative myositis pseudomyogenic hemangioendothelioma PVP granuloma radiation associated cutaneous atypical vascular lesion retiform hemangioendothelioma rhabdomyoma-adult rhabdomyoma-fetal rhabdomyoma-genital rhabdomyosarcoma-alveolar rhabdomyosarcoma-embryonal rhabdomyosarcoma-general rhabdomyosarcoma-pleomorphic rhabdomyosarcoma-spindle cell / sclerosing sarcomas-general schwannoma sclerosing epithelioid fibrosarcoma sinus histiocytosis with massive lymphadenopathy smooth muscle general solitary fibrous tumor spindle cell hemangioma spindle cell / pleomorphic lipoma staging-abdomen and thorax staging-general staging-GIST staging-head and neck staging-retroperitoneum staging-trunk and extremities staging-unusual sites subconjunctival herniated orbital fat superficial acral fibromyxoma syndromes synovial hemangioma synovial sarcoma tenosynovial giant cell tumor-diffuse tenosynovial giant cell tumor-localized teratoma tumoral calcinosis undifferentiated / unclassified sarcoma venous hemangioma verrucous hemangioma white fat