Bone and Soft Tissue Pathology

I. BONE AND JOINT

A. Metabolic Conditions Paget Disease Osteoporosis Osteomalacia Rickets Osteogenesis Imperfecta Hyperparathyroidism Serous Fat Atrophy Xanthomatosis Osteopetrosis Ochronosis Melorheostosis Gaucher Disease

B. Infectious and Inflammatory Conditions Osteoarthritis Rheumatoid Arthritis Septic Arthritis Gout Other Crystal-Induced Synovitis and Calcium Deposition Acute Osteomyelitis Chronic Osteomyelitis Osteonecrosis Bone Fracture and Fracture Callus

C. C ystic Lesions Aneurysmal Bone Cyst Unicameral Bone Cyst Intraosseous Ganglion

D. Giant Cell-Rich Lesions Giant Cell Tumor Giant Cell-Reparative Granuloma Brown Tumor Tenosynovial Giant Cell Tumor, Localized Type Tenosynovial Giant Cell Tumor, Diffuse Type

E. Mixed Periosteal Lesions Bizarre Parosteal Osteochondromatous Proliferation Subungual Exostosis Florid Reactive Periostitis

F. C artilage-Forming Lesions Solitary Osteochondroma Multiple Hereditary Exostoses Enchondroma Multiple Chondroma Syndromes (Ollier Disease, Maffucci Syndrome) Periosteal Chondroma Synovial Chondromatosis Chondro-Osseous Loose Body Chondromyxoid Fibroma Chondroblastoma Conventional Intramedullary Chondrosarcoma Chondrosarcoma of the Small Bones of the Hands and Feet Periosteal Chondrosarcoma Secondary Chondrosarcoma Clear Cell Chondrosarcoma Dedifferentiated Chondrosarcoma Mesenchymal Chondrosarcoma

G. B one-Forming Lesions Bone Island Osteoid Osteoma Osteoblastoma Conventional Osteosarcoma Small Cell Osteosarcoma Telangiectatic Osteosarcoma High-Grade Surface Osteosarcoma Post-Treatment Osteosarcoma Parosteal Osteosarcoma Periosteal Osteosarcoma Low-Grade Central Osteosarcoma Chondroblastoma-Like Osteosarcoma

H. N otochordal Tumors Benign Notochordal Cell Tumor Chordoma

I. F ibrous Lesions Fibrous Dysplasia Osteofibrous Dysplasia Desmoplastic Fibroma Nonossifying Fibroma Ossifying Fibroma

J. Vascular Lesions Hemangioma Synovial Hemangioma Epithelioid Hemangioma Epithelioid Hemangioendothelioma Angiosarcoma of Bone Massive Osteolysis

K. E wing Sarcoma

L. H ematopoietic Lesions Primary Osseous Lymphoma Acute Myeloid Leukemia Plasmacytoma Langerhans Cell Histiocytosis Mastocytosis

M. Undifferentiated Pleomorphic Sarcoma of Bone

N. Adamantinoma

O. L ipomatous Tumors Intraosseous Lipoma Synovial Lipomatosis

P. C arcinoma Metastatic Carcinoma Squamous Cell Carcinoma Arising in a Draining Sinus of Chronic Osteomyelitis

II. SOFT TISSUE

A. Inflammatory and Pseudosarcomatous Myofibroblastic Proliferations Nodular Fasciitis Proliferative Myositis and Proliferative Fasciitis Ischemic Fasciitis Postoperative Spindle Cell Nodule Necrotizing Fasciitis

B. F ibrosing Lesions and Fibromatoses Elastofibroma Desmoplastic Fibroblastoma Hypertrophic Scar Keloid Fibrous Hamartoma of Infancy Gardner Fibroma Nuchal Fibroma Fibromatosis Colli Calcifying Aponeurotic Fibroma Fibroma of Tendon Sheath Superficial Fibromatosis Deep Fibromatosis Inclusion-Body Fibroma IgG4-Related Sclerosing Disease

C. Myofibroblastic Tumors Myofibroblastoma (Mammary Type) Inflammatory Myofibroblastic Tumor Myofibroma and Myofibromatosis Intranodal Myofibroblastoma Myofibroblastic Sarcoma

D. Periva scular Tumors Glomus Tumor Glomuvenous Malformation Myopericytoma

E. F ibroblastic and Fibrohistiocytic Tumors Reticulohistiocytoma Juvenile Xanthogranuloma Benign Fibrous Histiocytoma Angiomatoid Fibrous Histiocytoma Plexiform Fibrohistiocytic Tumor Superficial Acral Fibromyxoma Superficial Angiomyxoma Dermatofibrosarcoma Protuberans Giant Cell Fibroblastoma Fibrosarcoma Arising in DermatofibrosarcomaProtuberans Adult Fibrosarcoma Infantile Fibrosarcoma Sclerosing Epithelioid Fibrosarcoma Low-Grade Fibromyxoid Sarcoma Atypical Fibroxanthoma Intramuscular Myxoma Myxofibrosarcoma

F. Adipose Tumors Lipoblastoma Lipoma and Lipomatosis Angiolipoma Neural Fibrolipoma Hibernoma Chondroid Lipoma Spindle Cell and Pleomorphic Lipoma Well-Differentiated Liposarcoma and Atypical Lipomatous Tumor Dedifferentiated Liposarcoma Myxoid and Round Cell Liposarcoma Pleomorphic Liposarcoma

G. S mooth Muscle Tumors Angioleiomyoma Pilar Leiomyoma Leiomyoma of Deep Soft Tissue Leiomyosarcoma of Soft Tissue Vascular Leiomyosarcoma Epstein-Barr Virus-Associated Smooth Muscle Tumor

H. Genital Stromal Tumors Fibroepithelial Polyp Angiomyofibroblastoma Cellular Angiofibroma Aggressive Angiomyxoma

I. S keletal Muscle Tumors Adult Rhabdomyoma Fetal Rhabdomyoma Genital Rhabdomyoma Alveolar Rhabdomyosarcoma Embryonal Rhabdomyosarcoma Pleomorphic Rhabdomyosarcoma

J. N erve and Nerve Sheath Tumors Traumatic Neuroma Schwannoma Ancient Schwannoma Ganglioneuroma Neurothekeoma Cellular Schwannoma Neurofibroma Plexiform Neurofibroma Palisaded Encapsulated Neuroma Perineurioma Malignant Peripheral Nerve Sheath Tumor Malignant Triton Tumor Granular Cell Tumor Malignant Granular Cell Tumor Neuroglial Heterotopia Neuroblastoma Esthesioneuroblastoma Paraganglioma Melanotic Neuroectodermal Tumor of Infancy

K. Vascular Tumors Papillary Endothelial Hyperplasia Pyogenic Granuloma Arteriovenous Malformation Capillary Hemangioma Cavernous Hemangioma Lymphangioma Epithelioid Hemangioma Kimura Disease Spindle Cell Hemangioma Sinusoidal Hemangioma Epithelioid Hemangioendothelioma Hobnail Hemangioendothelioma Angiosarcoma Intimal Sarcoma Kaposi Sarcoma Kaposiform Hemangioendothelioma

L. B one and Cartilage Tumors of Soft Tissue Soft Tissue Chondroma Extraskeletal Myxoid Chondrosarcoma Nuchal Fibrocartilaginous Pseudotumor Myositis Ossificans Ossifying Fibromyxoid Tumor Soft Tissue Osteosarcoma

M. Periva scular Epithelioid Cell Neoplasms

N. T umors of Uncertain Lineage Pleomorphic Hyalinizing Angiectatic Tumor of Soft Parts Soft Tissue Myoepithelioma Alveolar Soft Part Sarcoma Clear Cell Sarcoma Synovial Sarcoma Extrarenal Rhabdoid Tumor Epithelioid Sarcoma (Proximal and Distal) Desmoplastic Small Round Cell Tumor Primitive Neuroectodermal Tumor (Ewing Sarcoma) Giant Cell Tumor of Soft Tissue Undifferentiated Pleomorphic Sarcoma Phosphaturic Mesenchymal Tumor Myxoinflammatory Fibroblastic Sarcoma Ectopic Hamartomatous Thymoma Solitary Fibrous Tumor and Hemangiopericytoma