Detailed Table of Contents

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1 Detailed 1 Immunostains: Introduction... 1 Natasha Rekhtman and Justin Bishop General Background... 1 Applications of Immunohistochemistry in Anatomic Pathology... 1 Markers of Differentiation at a Glance... 2 Location, Location, Location! Primer on Location of Antigens... Primer on Cytokeratins CK7 and CK20 Expression Profiles Diagram... 7 CK7 and CK20 Expression Profiles... 8 Expression of EMA, CEA and Vimentin in Carcinomas... 9 Primer on Markers of Muscle Differentiation... Primer on Markers of Neuroendocrine Differentiation Primer on Markers of Melanocytic Differentiation... Primer on Markers of Neuroglial Differentiation Primer on Markers of Vascular Differentiation Primer on Assessment of Invasion General Panels Differential Diagnosis of Undifferentiated Malignant Neoplasm... Carcinoma of Unknown Primary: Site-Specific Markers Differential Diagnosis of Small Round Blue Cell Tumors Differential Diagnosis of Spindle Cell Tumors Differential Diagnosis of Neuroendocrine and Neuroectodermal Neoplasms Predictive Markers... Semiquantitative assessment (ER/PR, HER2, EGFR) Immunostains: Organ Systems... Natasha Rekhtman, Ashlie Burkhart, Amy Duffield, Janis Taube, Tara Miller, Ross Miller, Justin Bishop Breast... Breast: Key Markers at a Glance... Markers for Myoepithelial Cells (and what else they stain)... Breast: Immunoprofiles at a Glance... DDx of In Situ Proliferations DDx of Papillary Lesions DDx of Low Grade Spindle Cell Proliferations in the Breast DDx of Pagetoid Proliferations in the Nipple... Genitourinary Tract Prostate and Bladder... Prostate: Key Markers at a Glance... Prostate: Immunoprofiles at a Glance... Reactive Urothelial Atypia vs. Carcinoma in Situ... Dx of the Depth of Invasion by Urothelial Carcinoma... DDx of Adenocarcinoma Involving the Bladder... Adenocarcinoma of Bladder and Prostate vs. Mimics... Urothelial Carcinoma vs. High-Grade Prostate Carcinoma... Kidney and Adrenal Kidney: Key Markers at a Glance Kidney: Immunoprofiles at a Glance Adrenal: Immunoprofiles at a Glance DDx of Main Types of Renal Cortical Neoplasms... DDx of Cytologically Bland Renal Tumors with Tubulo-papillary Architecture... DDx of Renal Tumors with Clear Cells... Renal Cell Carcinoma vs. Adrenocortical Neoplasm... xv

2 xvi Testis... Testicular Neoplasms: Key Multipurpose Markers at a Glance... Testicular Neoplasms: Immunoprofiles at a Glance... Head and Neck... Thyroid, Parathyroid, and Sinonasal Tract Thyroid and Parathyroid Neoplasms: Immunoprofiles at a Glance DDx of Poorly Differentiated Neoplasms in the Sinonasal Tract DDx of Basaloid Carcinomas of the Head and Neck Salivary Gland... Salivary Gland Neoplasms: Immunoprofiles (and Special Stains) at a Glance... DDx of Salivary Gland Tumors with Clear Cells... Gastrointestinal Tract... Pancreas... Pancreas: Immunoprofiles at a Glance DDx of Pancreatic Neoplasms with Cellular (no desmoplastic stroma) Acinar/Solid Growth Pattern Tubular Gastrointestinal Tract DDx for the Site of Origin of Intestinal Metaplasia at the GE junction Evaluation of Dysplasia in IBD... Diagnosis of Autoimmune Metaplastic Atrophic Gastritis/ Pernicious Anemia Testing of DNA Mismatch Repair Proteins by Ashlie Burkart... Liver Hepatocellular carcinoma vs. Cholangiocarcinoma vs. Metastatic Adenocarcinoma... Hepatocellular carcinoma vs. Benign Hepatocellular Nodule... Thoracic... Lung and Thymus... Lung: Immunoprofiles at a Glance... DDx of Neuroendocrine Neoplasms of the Lung... Carcinoid Tumorlet vs. Minute Meningothelial-like Nodule... DDx of Thymic Epithelial Neoplasms... Mesothelioma... Mesothelioma vs. Adenocarcinoma... DDx Malignant vs. Reactive Mesothelial Proliferations... Soft Tissue Select Mesenchymal Tumors: Immunoprofile at a Glance Central Nervous System... Lesions of Central Nervous System at a Glance... Astrocytoma vs. Oligodendroglioma... DDx of Clear Cell Nested Tumors in CNS... DDx of Dural-Based Spindle Cell Tumors... DDx of Myxoid and Chondromyxoid Lesions of the CNS/Coverings... Gynecologic Tract... Gynecologic Tract: Key Markers at a Glance... Gynecologic Tract: Immunoprofiles at a Glance... Ovarian Germ Cell Tumors at a Glance... DDx of Dysplastic vs. Reactive Squamous Intraepithelial Lesions of the Cervix... DDx of Uterine Carcinomas... Endometrial vs. Endocervical Adenocarcinoma... DDx of Uterine Spindle Cell Neoplasms... DDx of Serous Tubal Intraepithelial Carcinoma... DDx of Ovarian Tumors with Tubular/Trabecular Pattern... DDx of Trophoblastic Tumors... DDx of Hydatidiform Moles Skin by Janis Taube, Natasha Rekhtman, Justin Bishop General Key Melanocytic Markers at a Glance Select Skin Lesions: Immunoprofiles at a Glance... DDx of Melanocytic Lesions

3 xvii DDx of Cutaneous Storiform Spindle Cell Lesions... DDx of Cutaneous High-Grade Neuroendocrine Carcinomas... DDx of Ugly-Looking Spindle Cell Neoplasms of the Skin... DDx of Pagetoid Proliferations in the Skin... DDx of Mammary vs. Extra-mammary Paget s Disease... Cutaneous Lymphomas by Janis Taube Classification of Cutaneous T Cell Lymphomas Classification of Primary Cutaneous B-cell Lymphomas Hematopoietic System by Amy Duffield, Justin Bishop, Tara Miller, Ross Miller, Natasha Rekhtman... General... Hematopoietic Markers at a Glance... Markers for Identification of Blasts... Cytochemistry for Identification of Blasts... Stages of Lymphocyte Differentiation and Corresponding Lymphomas B cell Lymphomas Reactive Hyperplasia versus Follicular Lymphoma Low-grade B cell lymphomas Hodgkin Lymphoma... DDx of Plasma Cell-Rich Neoplasms Immunoprofiles of Select Hematopoietic Disorders... B-cell and Plasma Cell Neoplasms T-cell Neoplasms... Other (Extranodal NK/T-cell lymphoma, Myeloid sarcoma, Paroxysmal Nocturnal hemoglobinuria) DDx of Post-transplant lymphoproliferative disorders... Histiocytic and Dendritic Cell Lesions Immunostains: Antibody Index... Justin Bishop, Amy Duffield, Diana Molavi, Natasha Rekhtman 55 Common Multipurpose Immunostains at a Glance... Alphabetical Antibody Index Special Stains Justin Bishop, Jennifer Broussard, Natasha Rekhtman Quick Primer on Mucins... Special Stains at a Glance Carbohydrates: Glycogen and mucosubstances... Connective Tissue... Other Common Applications... Microorganisms Alphabetical Index of Special Stain by Jennifer Broussard, Natasha Rekhtman, Justin Bishop Grading (and Classification) Systems... Justin Bishop, Amy Duffield, Diana Molavi, Natasha Rekhtman 77 General Grading of Adenocarcinoma, NOS Grading of Squamous Cell Carcinoma, NOS Breast... Elston Grading of Infiltrating Breast Cancer... Nuclear Grading of Ductal Carcinoma in Situ... Grading of Phyllodes Tumor... Genitourinary Tract... Prostate and Kidney Gleason Grading of Prostate Cancer Grading of Prostatic Intraepithelial Neoplasia Fuhrman Nuclear Grading of Renal Cell Carcinoma... 79

4 xviii Bladder and Wilms Tumor... The WHO (2003)/ISUP Consensus Classification of Non-invasive (In Situ) Papillary Urothelial Neoplasms... The WHO (2003)/ISUP Consensus Classification of Flat In Situ Urothelial Neoplasms... Wilms tumor: Criteria for Anaplasia (unfavorable histology)... Head and Neck Grading of Thyroid Carcinomas Grading of Salivary Gland Carcinomas Mucoepidermoid Carcinoma, AFIP Grading System Evaluation of Autoimmune Sialiadenitis (Sjögren s Disease) in Labial Biopsy... Gastrointestinal Tract Grading of Pancreatic Intraepithelial Neoplasia and Pancreatic Cystic Mucinous Neoplasms (IPMN and MCN)... Grading of Dysplasia in Barrett s Mucosa Grading and Staging of Chronic Viral Hepatitis... Criteria for Acute Liver Allograft Rejection... Sarcoma Grading (not for the Faint of Heart!) Neuroendocrine and Neuroectodermal Neoplasms Pulmonary Neuroendocrine Neoplasms, WHO 2004 Classification Gastroenteropancreatic Neuroendocrine Neoplasms, WHO 2010 Classification... Neuroblastoma, Revised Shimada Grading System Olfactory Neuroblastoma/Esthesioneuroblastoma, Hyams Grading System... Central Nervous System Meningioma, WHO Grading System... Gliomas, WHO Grading System... Gynecologic Tract Endometrioid Carcinoma, FIGO Grading Smooth Muscle Neoplasms of the Uterus Epithelioid Smooth Muscle Neoplasms of the Uterus... Grading of Immature Ovarian Teratomas Dating of Endometrium by Diana Molavi... Grading and Staging of Infections in the Placenta Hematopoietic System by Amy Duffield... Follicular Lymphoma, WHO Grading System Diagnostic Criteria for Plasma Cell Disorders, 2009 Update Myelodysplastic Syndromes, WHO Classification Acute Myeloid Leukemia NOS, WHO Classification Myeloproliferative Disorders, WHO Classification... Classification of Post-transplant Lymphoproliferative Disorders Transplant Pathology... Grading of Lung Allograft Rejection, ISHLT system... Grading of Acute Graft-versus-Host Disease in Intestinal Biopsy... Grading of Acute Graft-versus-Host Disease in Skin Biopsy... The Good the Bad and the Ugly: Prognostic Features in Neoplasms with Difficult-to-Predict Behavior... Adrenocortical Neoplasms, Pheochromocytoma, Solitary Fibrous Tumor Gastrointestinal Stromal Tumor, Parathyroid Neoplasms, Sertoli and Leydig Cell Tumors... Criteria for Micro-entities in Various Organs Potpourri of Quick Morphologic References... Natasha Rekhtman and Justin Bishop Tumor Differentials Generic Tumor Types... Tumors by Cell Type... Tumors by Architectural Pattern Potpourri of Differentials Benign Mimics of Malignancy 101 watch out! Small Round Blue Cell Tumors of Adulthood Small Round Blue Cell Tumors of Childhood

5 xix Quick Guide to Identification of Microorganisms in Tissue... There s Fungus among us! Quick Reference for Histologic Identification of Fungi Quick Reference for Histological Identification of Viruses... Reference for Tumors with Viral Associations Tumor Syndromes Justin Bishop, Ashlie Burkart, Natasha Rekhtman Quick Summary of Tumor Syndromes Multiple Endocrine Neoplasia Syndromes, Neurocutaneous Syndromes Syndromes Associated with Renal Neoplasms, Syndromes Associated with Tumors of Bone Syndromes Associated with GI Polyps and Neoplasms by Ashlie Burkart and Natasha Rekhtman Syndromes Associated with Breast Cancer, Syndromes Associated with Skin Tumors... Other Slide to Syndrome by Justin Bishop, Ashlie Burkart, Natasha Rekhtman... Lynch Syndrome: Clinicopathologic predictors and testing algorithms by Justin Bishop, Ashlie Burkhart, Natasha Rekhtman Tumor Genetics and Cytogenetics... Justin Bishop, Amy Duffield, Ashlie Burkhart, Natasha Rekhtman 119 Molecular Associations at a Glance... Cytogenetic and Genetic Changes in Leukemia/Lymphoma by Amy Duffield B Cell Leukemia/Lymphoma T Cell Leukemia/Lymphoma Myeloid Leukemia and Myelodysplastic Syndrome Cytogenetic and Genetic Changes in Solid Tumors by Justin Bishop, Ashlie Burkhart, Natasha Rekhtman... Select Solid Tumors with Recurrent Genetic Alterations Brain and Meninges... Recurrent Genetic Alterations in Select Carcinomas Quick Clinical References for Pathologists... Justin Bishop and Natasha Rekhtman 1 Metastasis To and From : a Quick Reference... General principles Metastasis From To... 1 Metastasis To From Serologic Tumor Markers: Common Associations... 1 Targeted Therapies and Predictive Markers Welcome to the Future!... Solid Tumors Selected Hematopoietic Tumors Pathology Web Resources... 1 Terina Chen 11 CPT (Current Procedural Terminology) Coding Quick Reference... 1 Diana Molavi 12 It Looks Like WHAT? An Illustrated Glossary of Histopathologic Descriptors Natasha Rekhtman and Kathryn Villa References Subject Index Unless otherwise specified, subsection authors are Justin Bishop and Natasha Rekhtman.