| PART 1: SKIN
 Section 1: Benign
 
 4 Blue Nevus
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 8 Epidermal Nevus
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 12 Epidermodysplasia Verruciformis
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 14 Langerhans Cell Histiocytosis
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 18 Melanocytic Nevus
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 24 Nevus Sebaceus
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 26 Pilomatricoma
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 30 Pyogenic Granuloma
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 32 Rhabdomyomatous Mesenchymal Hamartoma
 Angelica R. Putnam, MD
 34 Spitz Nevus
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 38 Syringoma
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 40 Trichilemmoma
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 44 Trichoepithelioma
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 48 Verruca Vulgaris
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 
 Section 2: Borderline
 
 52 Dysplastic Nevus
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 
 Section 3: Malignant Primary
 
 56 Malignant Melanoma
 Christopher Lum, MD, Emily Leibovitch, BA, and Amity Tran, BA
 
 PART II: SOFT TISSUE
 
 Section 1: Benign
 
 66 Calcifying Aponeurotic Fibroma
 Jeremy C. Wallentine, MD and Angelica R. Putnam, MD
 68 Calcifying Fibrous Tumor
 Jeremy C. Wallentine, MD and Angelica R. Putnam, MD
 70 Cellular Neurothekeoma
 Alexandros D. Polydorides, MD, PhD and Angelica R. Putnam, MD
 72 Congenital Hemangioma
 Kandi Stallings-Archer, MD
 76 Lipomatosis
 Angelica R. Putnam, MD
 78 Fetal Rhabdomyoma
 Cyril Fisher, MD, DSc, FRCPath
 82 Fibrodysplasia Ossificans Progressiva
 Angelica R. Putnam, MD
 84 Fibrolipomatous Hamartoma of Nerve
 Angelica R. Putnam, MD and Cyril Fisher, MD, DSc, FRCPath
 86 Fibromatosis Colli
 Angelica R. Putnam, MD and Cyril Fisher, MD, DSc, FRCPath
 88 Fibrous Hamartoma of Infancy
 Jessica M. Comstock, MD, Angelica R. Putnam, MD, and
 Karen S. Thompson, MD
 90 Fibrous Histiocytoma
 Karen S. Thompson, MD
 94 Fibrous Umbilical Polyp
 Larissa V. Furtado, MD
 96 Gardner Fibroma
 Larissa V. Furtado, MD and Karen S. Thompson, MD
 98 Giant Cell Fibroblastoma/Dermatofibrosarcoma Protuberans
 Karen S. Thompson, MD and Angelica R. Putnam, MD
 104 Glomuvenous Malformation
 Angelica R. Putnam, MD and Jeremy C. Wallentine, MD
 106 Infantile Hemangioma
 Jeremy C. Wallentine, MD, Angelica R. Putnam, MD, and Karen S. Thompson, MD
 110 Inclusion Body Fibromatosis
 Elizabeth A. Montgomery, MD
 114 Infantile/Juvenile Hyaline Fibromatosis
 Elizabeth A. Montgomery, MD
 116 Inflammatory Myofibroblastic Tumor
 Karen S. Thompson, MD and Angelica R. Putnam, MD
 122 Juvenile Xanthogranuloma
 Jessica M. Comstock, MD and Karen S. Thompson, MD
 124 Lipoblastoma
 Jessica M. Comstock, MD and Angelica R. Putnam, MD
 126 Lipofibromatosis
 Angelica R. Putnam, MD
 128 Myofibroma and Myopericytoma
 Angelica R. Putnam, MD, Elizabeth A. Montgomery, MD, and Karen S. Thompson, MD
 134 Myositis Ossificans
 Angelica R. Putnam, MD
 136 Neurofibroma
 Alexandros D. Polydorides, MD, PhD and Angelica R. Putnam, MD
 142 Nodular Fasciitis
 Jeremy C. Wallentine, MD and Angelica R. Putnam, MD
 146 Proliferative Fasciitis/Myositis
 Jeremy C. Wallentine, MD and Angelica R. Putnam, MD
 148 Schwannoma
 Jessica M. Comstock, MD and Angelica R. Putnam, MD
 152 Spindle Cell Hemangioma
 Jeremy C. Wallentine, MD
 154 Tufted Angioma
 Jeremy C. Wallentine, MD and Angelica R. Putnam, MD
 
 Section 2: Borderline
 
 158 Angiomatoid Fibrous Histiocytoma
 Angelica R. Putnam, MD
 160 Desmoid Fibromatosis
 Karen S. Thompson, MD
 164 Kaposiform Hemangioendothelioma
 Jeremy C. Wallentine, MD
 
 Section 3: Malignant Primary
 
 170 Alveolar Soft Part Sarcoma
 Karen S. Thompson, MD
 172 Clear Cell Sarcoma of Soft Tissue
 Jerad M. Gardner, MD
 176 Desmoplastic Small Round Cell Tumor
 Angelica R. Putnam, MD and Karen S. Thompson, MD
 182 Epithelioid Sarcoma
 Matthew R. Lindberg, MD
 188 Infantile Fibrosarcoma
 Karen S. Thompson, MD
 192 Low-Grade Fibromyxoid Sarcoma/Sclerosing
 Epithelioid Fibrosarcoma
 Angelica R. Putnam, MD
 196 Malignant Peripheral Nerve Sheath Tumor
 Karen S. Thompson, MD
 202 Rhabdomyosarcoma
 Karen S. Thompson, MD
 212 Synovial Sarcoma
 Angelica R. Putnam, MD
 218 Undifferentiated Small Round Cell Sarcomas
 Karen S. Thompson, MD
 
 PART III: BONE AND JOINT
 
 Section 1: Benign
 
 222 Aneurysmal Bone Cyst
 Jessica M. Comstock, MD
 226 Chondroblastoma
 Sarah Culkin Mengshol, MD and Karen S. Thompson, MD
 230 Chondromyxoid Fibroma
 Kelley E. Capocelli, MD and Karen S. Thompson, MD
 236 Enchondroma
 Jessica M. Comstock, MD
 238 Fibrous Dysplasia
 Sarah Culkin Mengshol, MD
 240 Giant Cell Tumor of Bone
 Jessica M. Comstock, MD and Karen S. Thompson, MD
 244 Non-Ossifying Fibroma
 Sarah Culkin Mengshol, MD
 246 Osteoblastoma
 Kelley E. Capocelli, MD
 250 Osteochondroma
 Sarah Culkin Mengshol, MD
 254 Osteofibrous Dysplasia
 Karen S. Thompson, MD
 256 Osteoid Osteoma
 Kelley E. Capocelli, MD
 262 Simple Bone Cyst
 Jessica M. Comstock, MD and Karen S. Thompson, MD
 266 Synovial Lipomatosis (Hoffa Disease)
 Jeremy C. Wallentine, MD
 268 Tenosynovial Giant Cell Tumor
 Angelica R. Putnam, MD
 
 Section 2: Malignant Primary
 
 274 Adamantinoma
 Jessica M. Comstock, MD and Karen S. Thompson, MD
 276 Chondrosarcoma
 Jessica M. Comstock, MD and Karen S. Thompson, MD
 282 Chordoma
 Jessica M. Comstock, MD and Karen S. Thompson, MD
 284 Ewing Sarcoma
 Angelica R. Putnam, MD and Karen S. Thompson, MD
 290 Osteosarcoma
 Angelica R. Putnam, MD
 
 PART IV: BREAST
 
 Section 1: Benign
 
 304 Fibroadenoma
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 308 Fibrocystic Change
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 312 Gynecomastia
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 314 Juvenile Fibroadenoma
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 316 Juvenile Hypertrophy
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 318 Juvenile Papillomatosis
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 320 Pseudoangiomatous Stromal Hyperplasia
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 324 Tubular Adenoma
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 
 Section 2: Borderline
 
 328 Phyllodes Tumor
 Jeffrey L. Killeen, MD and Jeremy C. Wallentine, MD
 
 Section 3: Malignant Primary
 
 334 Secretory Carcinoma
 Jeffrey L. Killeen, MD and David G. Hicks, MD
 
 PART V: CENTRAL NERVOUS SYSTEM
 
 Section 1: Gliomas, Glioneuronal Tumors, and Neuronal Tumors
 
 340 Angiocentric Glioma
 Tarik Tihan, MD, PhD and Melike Pekmezci, MD
 346 Astroblastoma, MN1-Altered
 Alexandros D. Polydorides, MD, PhD, Peter C. Burger, MD, and B. K. Kleinschmidt-DeMasters, MD
 352 Diffuse Hemispheric Glioma, H3 G34-Mutant
 Alexandros D. Polydorides, MD, PhD, B. K. Kleinschmidt- DeMasters, MD, and Melike Pekmezci, MD
 354 Diffuse Midline Glioma, H3 K27-Altered
 Melike Pekmezci, MD and B. K. Kleinschmidt-DeMasters, MD
 360 Diffuse Pediatric-Type High-Grade Glioma, H3- Wildtype and IDH-Wildtype
 Alexandros D. Polydorides, MD, PhD
 368 Ependymoma
 Alexandros D. Polydorides, MD, PhD and Angelica R. Putnam, MD
 376 Other Glioneuronal and Neuronal Tumors
 Alexandros D. Polydorides, MD, PhD
 384 Infant-Type Hemispheric Glioma
 Melike Pekmezci, MD and B. K. Kleinschmidt-DeMasters, MD
 386 Meningioangiomatosis
 Alexandros D. Polydorides, MD, PhD
 390 Pediatric Low-Grade Glioma/Glioneuronal Tumors, Including MYB-, MYBL1-, MAPK-Altered Tumors
 Fausto J. Rodríguez, MD and B. K. Kleinschmidt-DeMasters, MD
 394 Pilocytic Astrocytoma
 Alexandros D. Polydorides, MD, PhD
 400 Pleomorphic Xanthoastrocytoma
 Alexandros D. Polydorides, MD, PhD
 406 Polymorphous Low-Grade Neuroepithelial Tumor of the Young
 Melike Pekmezci, MD and B. K. Kleinschmidt-DeMasters, MD
 410 Subependymal Giant Cell Astrocytoma
 Alexandros D. Polydorides, MD, PhD
 
 Section 2: Choroid Plexus Tumors
 
 418 Choroid Plexus Tumors
 Alexandros D. Polydorides, MD, PhD
 
 Section 3: Central Nervous System Embryonal Tumors
 
 428 Atypical Teratoid/Rhabdoid Tumor
 Alexandros D. Polydorides, MD, PhD
 434 Other Central Nervous System Embryonal Tumors
 Alexandros D. Polydorides, MD, PhD and Fausto J. Rodríguez, MD
 446 Medulloblastoma
 Alexandros D. Polydorides, MD, PhD
 
 Section 4: Pineal Tumors
 
 458 Pineal Parenchymal Tumors
 Alexandros D. Polydorides, MD, PhD
 
 Section 5: Tumors of the Sellar Region
 
 468 Craniopharyngioma
 Alexandros D. Polydorides, MD, PhD
 474 Pituitary Blastoma
 Alexandros D. Polydorides, MD, PhD, B. K. Kleinschmidt-
 DeMasters, MD, and Melike Pekmezci, MD
 
 PART VI: ENDOCRINE
 
 Section 1: Endocrine Tumors
 
 482 Adrenal Cortical Neoplasms
 Vania Nosé, MD, PhD
 490 Follicular Thyroid Neoplasms
 Jeremy C. Wallentine, MD and Vania Nosé, MD, PhD
 496 Medullary Thyroid Carcinoma
 Vania Nosé, MD, PhD and Angelica R. Putnam, MD
 502 Neuroblastic Tumors
 Jessica M. Comstock, MD, Karen S. Thompson, MD, and
 Angelica R. Putnam, MD
 514 Papillary Thyroid Carcinoma
 Angelica R. Putnam, MD and Karen S. Thompson, MD
 
 PART VII: HEAD AND NECK
 
 Section 1: Benign
 
 524 Congenital Granular Cell Epulis
 Larissa V. Furtado, MD
 528 Melanotic Neuroectodermal Tumor of Infancy
 Jeremy C. Wallentine, MD
 530 Pleomorphic Adenoma
 Larissa V. Furtado, MD and Brenda L. Nelson, DDS, MS
 536 Salivary Gland Anlage Tumor
 Angelica R. Putnam, MD and Karen S. Thompson, MD
 538 Sialoblastoma
 Angelica R. Putnam, MD
 
 Section 2: Malignant Primary
 
 542 Acinic Cell Carcinoma
 Angelica R. Putnam, MD
 544 Mucoepidermoid Carcinoma
 Larissa V. Furtado, MD and Brenda L. Nelson, DDS, MS
 550 Retinoblastoma
 Jessica M. Comstock, MD
 
 PART VIII: THORACIC
 
 Section 1: Benign
 
 556 Cardiac Fibroma
 Aliya N. Husain, MD
 558 Cardiac Rhabdomyoma
 Aliya N. Husain, MD
 560 Cystic Teratoma of Heart
 Aliya N. Husain, MD
 562 Conduction System Hamartoma
 Bahig M. Shehata, MD
 566 Laryngotracheal Papillomatosis
 Aliya N. Husain, MD
 
 Section 2: Malignant Primary
 
 570 Pleuropulmonary Blastoma
 Aliya N. Husain, MD and Angelica R. Putnam, MD
 574 Thymoma
 David I. Suster, MD and Saul Suster, MD
 
 PART IX: ALIMENTARY CANAL
 
 Section 1: Benign
 
 592 Familial Adenomatous Polyposis
 Scott R. Owens, MD
 596 Hamartomatous Polyps, Including Juvenile Polyps
 Cameron Beech, MD
 600 Inflammatory Polyps
 Scott R. Owens, MD
 604 Neuroendocrine Tumors
 Larissa V. Furtado, MD and Angelica R. Putnam, MD
 
 Section 2: Malignant Primary
 
 610 Gastrointestinal Stromal Tumor
 Angelica R. Putnam, MD and Elizabeth A. Montgomery, MD
 
 PART X: LIVER/PANCREAS
 
 Section 1: Benign
 
 616 Focal Nodular Hyperplasia
 Larissa V. Furtado, MD and Angelica R. Putnam, MD
 618 Hepatic Adenomas
 Kimberley Evason, MD, PhD and Matthew M. Yeh, MD, PhD
 622 Hepatic Hemangiomas
 Angelica R. Putnam, MD
 626 Islet Cell Adenoma
 Larissa V. Furtado, MD and Angelica R. Putnam, MD
 628 Mesenchymal Hamartoma of Liver
 Larissa V. Furtado, MD and Karen S. Thompson, MD
 630 Nesidioblastosis
 Larissa V. Furtado, MD
 632 Nodular Regenerative Hyperplasia
 Larissa V. Furtado, MD
 
 Section 2: Malignant Primary
 
 636 Fibrolamellar Hepatocellular Carcinoma
 Kimberley Evason, MD, PhD, Larissa V. Furtado, MD, and Angelica R. Putnam, MD
 640 Hepatoblastoma
 Larissa V. Furtado, MD, Karen S. Thompson, MD, and Angelica R. Putnam, MD
 646 Pancreatoblastoma
 Larissa V. Furtado, MD
 650 Pediatric Hepatocellular Carcinoma
 Kimberley Evason, MD, PhD
 654 Solid Pseudopapillary Neoplasm
 Sanjay Kakar, MD and Grace E. Kim, MD
 658 Undifferentiated Embryonal Sarcoma
 Karen S. Thompson, MD
 
 PART XI: RENAL
 
 Section 1: Benign
 
 662 Pediatric Cystic Nephroma
 Angelica R. Putnam, MD and Stephen M. Bonsib, MD
 666 Ossifying Renal Tumor of Infancy
 Karen S. Thompson, MD
 668 Renal Metanephric Tumors
 Satish K. Tickoo, MD, Victor E. Reuter, MD, and Karen S. Thompson, MD
 
 Section 2: Malignant Primary
 
 678 Clear Cell Sarcoma of Kidney
 Jeremy C. Wallentine, MD
 682 Congenital Mesoblastic Nephroma
 Aliya N. Husain, MD
 686 Malignant Rhabdoid Tumor of Kidney
 Jeremy C. Wallentine, MD and Karen S. Thompson, MD
 690 SMARCB1-Deficient Renal Medullary Carcinoma
 Karen S. Thompson, MD
 692 TFE3- and TFEB-Rearranged Renal Cell Carcinomas
 Satish K. Tickoo, MD and Victor E. Reuter, MD
 700 Tuberous Sclerosis Complex
 Kristine Cornejo, MD and Christie L. Boils, MD
 710 Nephroblastic Tumors, Including Wilms
 Angelica R. Putnam, MD, Aliya N. Husain, MD, and Karen S. Thompson, MD
 
 PART XII: REPRODUCTIVE
 
 Section 1: Germ Cell Tumors
 
 724 Choriocarcinoma (Nongestational)
 Koah Vierkoetter, MD, David Shimizu, MD, and Esther Oliva, MD
 726 Embryonal Carcinoma
 David Shimizu, MD and Koah Vierkoetter, MD
 730 Germinoma Family of Tumors
 Silvia Skripenova, MD, Jeffrey L. Killeen, MD, and Karen S. Thompson, MD
 734 Germ Cell Neoplasia In Situ
 Steven S. Shen, MD, PhD, Muhammad T. Idrees, MD, and Jae Y. Ro, MD, PhD
 740 Gonadoblastoma
 Jeffrey L. Killeen, MD and Silvia Skripenova, MD
 742 Teratomas
 Karen S. Thompson, MD and Silvia Skripenova, MD
 750 Yolk Sac Tumor
 Koah Vierkoetter, MD, David Shimizu, MD, and Silvia Skripenova, MD
 
 Section 2: Sex Cord-Stromal Tumors
 
 756 Fibroma-Thecoma
 Koah Vierkoetter, MD, David Shimizu, MD, and Silvia Skripenova, MD
 758 Juvenile Granulosa Cell Tumor
 Jeffrey L. Killeen, MD and Silvia Skripenova, MD
 760 Sertoli-Leydig Cell Tumors
 Koah Vierkoetter, MD, David Shimizu, MD, and Silvia Skripenova, MD
 
 PART XIII: HEMATOPOIETIC
 
 Section 1: Malignant Primary
 
 766 Acute Myeloid Leukemias
 Kathryn Foucar, MD and Kaaren K. Reichard, MD
 774 Anaplastic Large Cell Lymphoma, ALK (+)
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 782 Autoimmune Lymphoproliferative Syndrome
 Andrea N. Marcogliese, MD, L. Jeffrey Medeiros, MD, and Roberto N. Miranda, MD
 794 B-Acute Lymphoblastic Leukemias/Lymphomas
 Qian-Yun Zhang, MD, PhD
 802 Burkitt Lymphoma
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 808 Childhood Myelodysplastic Syndrome
 Andrea N. Marcogliese, MD and Carla S. Wilson, MD, PhD
 814 Classic Hodgkin Lymphoma
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 822 Diffuse Large B-Cell Lymphoma
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 828 Early T-Cell Precursor Acute Lymphoblastic Leukemia
 David R. Czuchlewski, MD
 830 Juvenile Myelomonocytic Leukemia
 Andrea N. Marcogliese, MD, Devon Chabot-Richards, MD, and Qian-Yun Zhang, MD, PhD
 834 Mastocytosis
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 842 Myeloid Neoplasms With Germline Predisposition
 Andrea N. Marcogliese, MD and David R. Czuchlewski, MD
 844 Myeloid Proliferations Related to Down Syndrome
 Andrea N. Marcogliese, MD and David R. Czuchlewski, MD
 848 Myeloid Sarcoma
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 854 Nodular Lymphocyte-Predominant Hodgkin Lymphoma
 Andrea N. Marcogliese, MD, Pei Lin, MD, and L. Jeffrey Medeiros, MD
 866 Overview of Lymphoproliferative Disorders Associated With Primary Immunodeficiency Disorders
 Andrea N. Marcogliese, MD, L. Jeffrey Medeiros, MD, and Roberto N. Miranda, MD
 872 Pediatric-Type Follicular Lymphoma
 Andrea N. Marcogliese, MD and Jeremy C. Wallentine, MD
 876 Posttransplant Lymphoproliferative Disorders
 Andrea N. Marcogliese, MD and Mohammad A. Vasef, MD
 882 Primary Mediastinal (Thymic) Large B-Cell Lymphoma
 Andrea N. Marcogliese, MD and Francisco Vega, MD, PhD
 892 T-Cell Lymphoblastic Leukemias/Lymphomas
 Mohammad A. Vasef, MD
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