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Pathology Surgical Pathology Images Histology Micrograph Gross Path Histo Cytology Meningitis Alzheimer Type II astrocytes Gunshot wound, tattoo pigment Chondroblastoma Chondromyxoid Fibroma Chondrosarcoma, Conventional Type Chondrosarcoma, Mesenchymal Type Dedifferentiated Chondrosarcoma Enchondroma Optic nerve sheath hemorrhage Retinal hemorrhage Fibrous Dysplasia Nonossifying fibroma (Metaphyseal Fibrous Defect) Osteofibrous Dysplasia Fracture Cirrhosis Acute osteomyelitis Chronic Osteomyelitis Ruptured myocardial infarction Soot within airways Rheumatoid Arthritis Rheumatoid Arthritis Myelolipoma Cerebellar atrophy Ewing Sarcoma Hypertension Metabolic Paget Disease of Bone Fatty infiltration of right ventricle Osteoblastoma CMV esophagitis Bicuspid aortic valve Giant Cell Tumor of Bone Gunshot wound, soot Bronchopneumonia Refractile material within lungs Lactating Adenoma Tubular Adenoma Bacterial endocarditis Benign Adenomyoepithelioma Juvenile Fibroadenoma Mammary Hamartoma Sclerosing Lobular Hyperplasia Coronary artery thrombus Malignant Phyllodes Phyllodes Tumor Pulmonary embolus Hippocampal sclerosis Ductal Adenoma Aspiration pneumonia DCIS involving Sclerosing Adenosis Invasive Ductal Carcinoma Fat emboli Atypical ductal hyperplasia DCIS, solid type with comedonecrosis Gunshot wound, clothing fibers Diffuse alveolar damage Apocrine Carcinoma Invasive Neuroendocrine Carcinoma Lipid Rich Adenocarcinoma Medullary Carcinoma Mucinous Carcinoma Triple Negative Carcinoma Tubular Carcinoma Cerebellar arteriovenous malformation Hepatic emboli Invasive Lobular Carcinoma, Pleomorphic Type Coccidioidomycosis Lobular Carcinoma in Situ, Pleomorphic Variant Cerebral amyloid angiopathy Solvent vapor abuse leukoencephalopathy Gynecomastia Bronchopneumonia, autolysis Benign Diabetic Mastopathy Indeterminant Fibromatosis Malignant Angiosarcoma Neoplastic Myofibroblastoma Nipple Benign Nipple Adenoma Neoplastic Paget's Disease of Nipple Nonproliferative Breast Changes Benign Collageneous Spherulosis Pregnancy-like lactational changes Papillary Benign Intraductal Papilloma Papilloma with Usual Type Hyperplasia Neoplastic Papilloma with Superimposed DCIS Proliferative Disease Without Atypia Benign Radial Scar Sclerosing Adenosis Cardiovascular Heart Benign Papillary fibroelastoma Infectious Histoplasma Endocarditis Metabolic Cardiac Amyloidosis Neoplastic Atrial Myxoma Cardiac Fibroma Rhabdomyoma Peripheral Vasculature Inflammatory Thrombophlebitis Vascular Inflammatory Giant cell arteritis CNS Brain Benign Colloid Cyst of Third Ventricle Dermoid Cyst Infectious Neurocystercicosis Neoplastic Choroid Plexus Papilloma Dysembryoplastic Neuroepithelial Tumor Ependymoma, Anaplastic Variant Ependymoma, Myxopapillary Ganglioglioma Giant cell glioblastoma Glioblastoma Multiforme Oligodendroglioma Oligodendroglioma, Anaplastic Cerebellum Neoplastic Medulloblastoma Medulloblastoma, Desmoplastic Type Meninges Neoplastic Atypical Meningioma Meningioma, Anaplastic Variant Meningioma, Angiomatous Variant Meningioma, Chordoid Variant Meningioma, Clear Cell Variant Meningioma, Fibrous Variant Meningioma, Meningotheliomatous (Syncytial) Variant Meningioma, Microcystic Variant Meningioma, Psammomatous Variant Meningioma, Secretory Variant Meningioma, Transitional Variant Overview Meningioma Pituitary fossa Neoplastic Craniopharyngioma Spinal cord Neoplastic Chordoma Ependymoma Endocrine Adrenal Neoplastic Cortical Adenoma Cortical Carcinoma Ganglioneuroma Myelolipoma Neuroblastoma Neuroblastoma (Case 2) Neuroblastoma, Post-Chemotherapy Pheochromocytoma Normal Histology Parathyroid Benign Hyperplasia simulating Carcinoma Metabolic Parathyroid Hyperplasia Neoplastic Parathyroid Adenoma Parathyroid Carcinoma Peripheral Nervous System Neoplastic Extra-Adrenal Paraganglioma Pituitary Neoplastic Pituitary Adenoma Normal Histology Thyroid Autoimmune Hashimoto Thyroiditis Hashimoto Thyroiditis, Fibrosing Variant Benign Colloid (Adenomatoid) Nodule Graves Disease Hyperplasia C Cell Hyperplasia Inflammatory Subacute Granulomatous Thyroiditis Metabolic Minocycline-Associated Black Thyroid Neoplastic Anaplastic Carcinoma, Pleomorphic Giant Cell Type Anaplastic Carcinoma, Spindle Cell Type Anaplastic Carcinoma, Squamoid Type Anaplastic Carcinoma, with Osteoclast-like Giant Cells Follicular Adenolipoma Follicular Adenoma Hurthle Cell Adenoma Hurthle Cell Carcinoma Hyalinizing Trabecular Adenoma Medullary Carcinoma Papillary Carcinoma, Columnar Variant Papillary Carcinoma, Follicular Variant Papillary Carcinoma, Oncocytic Variant Papillary Carcinoma, Solid Variant Papillary Carcinoma, Tall Cell Variant Papillary Carcinoma, Warthin's Variant Papillary Thyroid Carcinoma Papillary Thyroid Carcinoma, Cribriform-Morular Type Sclerosing Mucoepidermoid Carcinoma with Eosinophils Forensic Pathology Adrenal Adrenal hemorrhage Aorta Aortic dissection Bone Brain Ischemic neurons Coronary artery Coronary artery dissection Dura Subdural hematoma Esophagus Eye Heart Contraction bands Myocarditis, lymphocytic Kidney Armanni-Ebstein change Ethylene glycol toxicity Pyelonephritis Liver Centrilobular necrosis Steatosis Lung Amniotic fluid embolism Anthracosis Asthma Drowning Emphysema Pancreas Acute hemorrhagic pancreatitis Pituitary Pituitary infarct Skin Electrocution Gunshot wound, hair shaft Small Intestines Eosinophilic gastroenteritis Teeth Composite compound odontoma Condylar fractures Dental implant Full dental radiographs, Adult Orangutan Retarded development of third premolar Trachea Tracheal necrosis Gastrointestinal Anal Infectious Tuberculosis Neoplastic Squamous cell carcinoma, Basaloid type Pre-Neoplastic High Grade Squamous Dysplasia (AIN III) Appendix Benign Cystic Fibrosis Enterobius vermicularis infection Inflammatory Acute Appendicitis Neoplastic Adenocarcinoma Carcinoid Goblet Cell Carcinoid Hyperplastic Polyp Low Grade Mucinous Neoplasm (Mucinous Adenoma) Pre-Neoplastic Sessile Serrated Adenoma Colon Autoimmune Collagenous Colitis Lymphocytic Colitis Benign Angiodysplasia Biopsy Site Tattoo Colitis Cystica Profunda Endometriosis Hyperplastic polyp Inflammatory Cloacogenic Polyp Leiomyoma Meckel Diverticulum Melanosis Coli Infectious Amebic Colitis CMV Colitis Cryptosporidiosis Intestinal Spirochetosis Schistosomiasis Typhlitis Inflammatory Diverticulitis Ischemic Colitis, Acute Ischemic Colitis, Chronic Malakoplakia Ulcerative Colitis Metabolic Amyloidosis Neoplastic Adenocarcinoma, Conventional Type Adenocarcinoma, Mismatch Repair Related Adenocarcinoma, Mucinous Signet Ring Type Ganglioneuroma Granular Cell Tumor Mucinous Adenocarcinoma Pre-Neoplastic Adenoma with Pseudoinvasion Traditional Sessile Adenoma Tubulovillous Adenoma Villous Adenoma Esophagus Autoimmune Lichen Planus Benign Benign Simple Cyst Duplication Cyst Eosinophilic Esophagitis Gastroesophageal Reflux Disease (GERD) Infectious Candidiasis Herpetic Esophagitis Neoplastic Adenocarcinoma Granular Cell Tumor Squamous Cell Carcinoma Pre-Neoplastic Glandular Dysplasia, Low Grade Reactive Barrett Esophagus (Intestinal Metaplasia) Iron Pill Esophagitis Gallbladder Benign Acute Gangrenous Cholecystitis Adenomyoma Reactive Atypia Inflammatory Choledocholithiasis Follicular Cholecystitis Xanthogranulomatous Cholecystitis Neoplastic Adenocarcinoma Clear Cell Adenocarcinoma Reactive Papillary Hyperplasia Liver Benign Amiodarone Bile Duct Adenoma Genign/Reactive Wilson's Disease Infectious Adenovirus Chronic Hepatitis C Grading (Activity) CMV hepatitis Echinococcal Cyst Herpes Simplex Hepatitis Metabolic Alcoholic Hepatitis Alpha-1 Antitrypsin Deficiency Cystic Fibrosis Fatty Liver Change Hemochromatosis Hepatic Amyloidosis Secondary iron overload Vitamin A Toxicity Metastatic Medullary Thyroid Carcinoma Neoplastic Angiosarcoma Cholangiocarcinoma Epithelioid Hemangioendothelioma Fibrolamellar hepatocellular carcinoma Hepatic Adenoma Hepatic Hemangioma Hepatoblastoma Hepatocellular Carcinoma Infantile Hemangioendothelioma Inflammatory Myofibroblastic Tumor Undifferentiated embryonal sarcoma Reactive Neonatal Giant Cell Hepatitis Pancreas Inflammatory Acute Pancreatitis Autoimmune Pancreatitis Chronic Pancreatitis Neoplastic Acinar Cell Carcinoma Adenosquamous Carcinoma Ductal Adenocarcinoma Intraductal Papillary Mucinous Neoplasm Microcystic serous cystadenoma Mucinous Cystic Neoplasm Pancreatoblastoma Normal Histology Small Intestines Benign Gastric Heteropia Inflammatory Fibroid Polyp Developmental Heterotopic Pancreas Indeterminant Necrotizing Enterocolitis Infectious Enteritis necroticans (Pigbel) Giardiasis Histoplasmosis MAI Infection Yersinia Enteritis Inflammatory Celiac Sprue NSAID-related Changes Neoplastic Adenocarcinoma (Jejunum) Adenocarcinoma with Mucinous Features Ampullary Adenocarcinoma, Intestinal Type Carcinoid (of Ileum) Gastrointestinal Stromal Tumor (Duodenum) PDGF-R Related Gastrointestinal Stromal Tumor Stomach Benign Cronkite-Canada polyps Fundic Gland Polyp Hyperplastic Polyp Inflammatory Fibroid Polyp Peutz-Jeugers Polyp Xanthoma Infectious CMV Gastritis Inflammatory Eosinophilic Gastritis H. pylori Gastritis Lymphocytic Gastritis Neoplastic Gastric Carcinoid Gastrointestinal Stromal Tumor (GIST) Kaposi Sarcoma Large Cell Neuroendocrine Carcinoma Leiomyoma Lymphoepithelial-like Gastric Carcinoma MALT Lymphoma Signet Ring Adenocarcinoma Pre-Neoplastic Gastric Dysplasia Reactive Acute hemorrhagic gastritis Chemical Gastropathy Gastric Antral Vascular Ectasia Iron Pill Gastritis Genitourinary Bladder Benign Post BCG Changes Pseudosarcomatous Myofibroblastic Proliferation Indeterminant Urachal Inflammatory Myofibroblastic Tumor Inflammatory Cystitis Cystica Cystitis Glandularis Hemorrhagic Cystitis Neoplastic Adenocarcinoma (Nonurachal) Adenocarcinoma, Mucinous Type Paraganglioma PUNLMP Transitional Cell Carcinoma, Glandular Differentiation Transitional Cell Carcinoma, High Grade (Invasive) Transitional Cell Carcinoma, High Grade Invasive (Case 2) Transitional Cell Carcinoma, Low Grade Transitional Cell Carcinoma, Nested Variant Pre-Neoplastic Urothelial Carcinoma in Situ Reactive Nephrogenic Adenoma Radiation Cystitis Epididymis Infectious Tuberculosis Kidney Developmental Autosomal Dominant Polycystic Kidney Disease Autosomal Recessive Polycystic Kidney Disease Infectious Polyoma Virus Infection Tuberculosis Inflammatory Acute Pyelonephritis Urolithiasis Xanthogranulomatous Pyelonephritis Malignant Postinfectious Glomerulonephritis Medical Acute Interstitial Nephritis Acute Tubular Necrosis Alport Syndrome Anti-Glomerular Basement Membrane Disease Diabetic Nephropathy Fibrillary Glomerulonephritis Focal Segmental Glomerulosclerosis Focal Segmental Glomerulosclerosis, Collapsing Glomerulopathy Focal Segmental Glomerulosclerosis, Glomerular tip lesion IgA Nephropathy Membranous Nephropathy Minimal Change Disease Pauci-immune Crescentic Glomerulonephritis Renal Cortical Necrosis Metabolic Renal Oxalosis Neoplastic Angiomyolipoma Benign Cystic Nephroma Clear Cell Sarcoma Congenital Mesoblastic Nephroma Juxtaglomerular Tumor Metanephric Adenoma Mixed Epithelial Stromal Tumor Oncocytoma Papillary Adenoma Renal Cell Carcinoma, Chromophobe Type Renal Cell Carcinoma, Papillary Type Renal Cell Carcinoma, Xp11Translocation Associated Renal Cystic Disease Associated Renal Cell Carcinoma Renomedullary Interstitial Cell Tumor Rhabdoid Tumor Synovial Sarcoma Wilms Tumor Normal Histology Transplantation Hyperacute Rejection Vascular Cholesteroli Emboli Paratesticular Benign Fibrous Pseudotumor Sperm Granuloma Neoplastic Aggressive Angiomyxoma Angiomyofibroblastoma Lymphangioma (of Scrotum) Penis Benign Penile fibromatosis (Peyronie's disease) Prostate Benign Granulomatous Prostatitis Testis Benign Epidermal inclusion cyst Neoplastic Carcinoid Choriocarcinoma Diffuse large B-cell lymphoma Embryonal Carcinoma Hemangioma Large Cell Calcifying Sertoli Tumor Leydig Cell Tumor Malignant Mixed Germ Cell Tumor Pure Yolk Sac Tumor Seminoma, Classic Type Spermatocytic Seminoma Teratoma Pre-Neoplastic Intratubular Germ Cell Neoplasia Gynecological Cervix Benign Adenomyoma Blue Nevus Endocervical Polyp Endometrial Cells on Pap Endometriosis Mesonephric Rests Microglandular Adenosis (Hyperplasia) Reactive Endocervical Cells Squamous Atrophy Squamous Metaplasia Transitional Metaplasia Tunnel Clusters Uterine Prolapse Infectious Actinomycosis Bacterial Vaginosis Herpes Simplex Viral Infection Trichomonas Neoplastic Adenocarcinoma Adenocarcinoma, Villoglandular Type Adenoid Basal Carcinoma Adenoma Malignum Clear Cell (Adeno)carcinoma Lymphoepithelial-like Carcinoma Mesonephric Adenocarcinoma Small Cell Neuroendocrine Carcinoma Squamous cell carcinoma Pre-Neoplastic Adenocarcinoma in situ Condyloma Acuminata High Grade Squamous Intraepithelial Lesion Low grade squamous intraepithelial lesion Reactive Radiation Atypia Reactive Atypia Reparative Atypia Endometrium Benign Atypical Polypoid Adenomyoma Endometrial Polyp Eosinophilic Syncytial Change Intravascular Endometrium Placental Site Nodule Tubal Metaplasia Tunnelling Dating Day 16 (Interval Phase) Day 17-18 (Early Secretory) Day 19 (Early Secretory) Day 20-21 (Mid Secretory) Day 22 (Mid Secretory) Day 23 (Late secretory) Day 24 (Late Secretory) Day 25-26 (Late secretory) Day 27 (Late Secretory) Menstrual Pattern Proliferative Endometrium Hormone Related Anovulatory pattern (Disordered Proliferative) Arias-Stella Reaction Atrophy Pill Effect Progestin Effect Tamoxifen Related Changes Inflammatory Acute endometritis Chronic Endometritis Granulomatous Endometritis Neoplastic Adenosarcoma with Sarcomatous Overgrowth Adenosarcoma, Low Grade Clear Cell Carcinoma Endometrial Carcinoma, Mismatch Repair Related Endometrioid Adenocarcinoma Endometrioid Adenocarcinoma, High Grade Endometrioid Adenocarcinoma, Squamous Differentiation Endometrioid adenocarcinoma, Villoglandular Variant Mixed Malignant Mullerian Tumor Papillary Serous Adenocarcinoma Serous Intraepithelial Carcinoma Small Cell Carcinoma Pre-Neoplastic Complex Atypical Hyperplasia Partially Treated Complex Atypical Hyperplasia Simple Hyperplasia Without Atypia Fallopian Tube Benign Decidualization Hydrosalpinx Paratubal Cyst Developmental Ectopic Pregnancy Walthard Nest Infectious Tubo-ovarian Abscess Inflammatory Acute Salpingitis Neoplastic Papillary Serous Adenocarcinoma Myometrium Benign Adenomyosis Neoplastic Adenomatoid Tumor Adenomyoma Benign Stromal Nodule Endometrial Stromal Sarcoma, Low-Grade Intravascular Leiomyomatosis Leiomyoma Leiomyoma, Highly Cellular Leiomyoma, Mitotically Active Leiomyosarcoma Leiomyosarcoma, Epithelioid Variant Lipoleiomyoma PEComa Undifferentiated endometrial sarcoma Uterine Tumor Resembling Sex Cord Tumor (UTROSCT) Ovary Benign Endometriosis Endosalpingiosis Polycystic Ovarian Syndrome (PCOS) Stromal Hyperthecosis Inflammatory Granulomatous Oophoritis Metastatic Carcinoma of Breast Colonic Adenocarcinoma Gastric Signet Ring Carcinoma Mesonephric Adenocarcinoma from Cervix Small Cell Carcinoma, Hypercalcemic Type Neoplastic Brenner Tumor Brenner Tumor, Borderline Choriocarcinoma, nongestational Clear Cell Carcinoma Dysgerminoma Endometrioid Adenocarcinoma Endometrioid Adenocarcinoma, Sertoliform Pattern Endometrioid Borderline Tumor Fibroma Fibrothecoma Gonadoblastoma Granulosa Cell Tumor Granulosa Cell Tumor, Juvenile Type Immature Teratoma Leydig Cell Tumor Malignant Mixed Mullerian (Mesodermal) Tumor Mature Cystic Teratoma Mucinous Borderline Tumor, Endocervical Type Mucinous Borderline Tumor, Endocervical-type (Case 2) Mucinous Borderline Tumor, Intestinal-type Mucinous Cystadenocarcinoma (Expansile Type) Mucinous Cystadenocarcinoma (Infiltrative Type) Mucinous Cystadenoma Pure Yolk Sac Tumor Sclerosing Stromal Tumor Serous Borderline Tumor Serous Borderline Tumor with Invasive Implants Serous Borderline Tumor with Non-invasive Implants Serous Borderline Tumor, Micropapillary Type Serous Carcinoma, Low Grade Serous Cystadenofibroma Sertoli-Leydig Cell Tumor Sex Cord Tumor with Annular Tubules Steroid Cell Tumor NOS Struma Ovarii Transitional Cell Carcinoma Normal Histology Corpus Luteum Infantile Ovary Reactive Luteoma of Pregnancy Torsion Placenta Benign Chorangioma Exaggerated Placental Site Hydropic Products of Conception Placenta Accreta Placenta Previa Developmental Twin Placenta Decidual Vasculopathy Implantation Site Infarction Massive perivillous fibrin deposition Meconium True Cord Knot Twin-Twin Transfusion Velamentous Cord Insertion Infectious Acute Chorioamnionitis Fusobacterium Listeria Parvovirus Inflammatory Acute Funisitis Chronic Villitis Neoplastic Complete Molar Pregnancy Gestational Choriocarcinoma Partial Mole Placental Site Trophoblastic Tumor Normal Villous Maturation Vascular Fetal Thrombotic Vasculopathy Vagina Benign Adenosis Mullerian Cyst Rhabdomyoma Vaginal cysts Infectious Candida Neoplastic Clear Cell Adenocarcinoma Yolk Sac Tumor Vulva Benign Bartholin Gland Cyst Endometriosis Fibroepithelial Stromal Polyp Hidradenoma Papilliferum Infectious Candidiasis Inflammatory Lichen Sclerosis Lichen Simplex Chronicus Metastatic Adenocarcinoma from Colon Neoplastic Angiomyofibroblastoma Cellular Angiofibroma Deep (Aggressive) Angiomyxoma Extramammary Paget disease Melanoma Squamous Cell Carcinoma, Microinvasive Superficial Angiomyxoma Pre-Neoplastic Condyloma Acuminata Intraepithelial Squamous Neoplasia, High Grade Head and Neck Ear Benign Cholesteatoma Neoplastic Endolymphatic Sac Tumor Eye Benign Keratoconus Oribital dermoid Neoplastic Choroidal Melanoma Retinoblastoma Larynx Benign Laryngocele Neoplastic Chondrosarcoma Papilloma with High Grade Dysplaisa Squamous Cell Carcinoma Pre-Neoplastic Vocal Cord Nodule/Polyp Nasopharynx Infectious Mycetoma Neoplastic Langerhans Cell Histiocytosis Nasopharyngeal Carcinoma Neck Benign Branchial Cleft Cyst Developmental Thyroglossal Duct Cyst Neoplastic Paraganglioma (Carotid Body) Oral Cavity Autoimmune Pemphigus Vulgaris Benign Amalgam Tatoo Amyloidosis (Tongue) Inflammatory Papillary Hyperplasia (Tongue) Odontogenic Keratocyst Oral Fibroma (Lip) Peripheral Giant Cell Reparative Granuloma Squamous Papilloma (of Palate) Infectious Herpetic Stomatitis Inflammatory Necrotizing sialometaplasia Periapical Granuloma Pyogenic Granuloma (of Tongue) Neoplastic Blue Nevus (involving Palate) Alveolar Soft Part Sarcoma (of Tongue) Ameloblastic Fibro-odontoma Ameloblastic Fibroma Ameloblastoma Calcifying Cystic Odontogenic Tumor Cementoblastoma Clear Cell Odontogenic Carcinoma Granular Cell Tumor (of Tongue) Odontogenic Myxoma Odontoma Ossifying Fibroma Squamous cell carcinoma (Floor of Mouth) Reactive Oral Fibroma (Tongue) Oropharynx Benign Lymphoepithelial Cyst of Tonsil Neoplastic p16 (+) Squamous Cell Carcinoma Peritonsillar Angiosarcoma Squamous Cell Carcinoma Tonsillar B-Cell Lymphoma Salivary Gland Benign Lymphoepithelial Cyst Neoplastic Acinic Cell Carcinoma Adenoid Cystic Carcinoma Basal Cell Adenoma, Membranous Type Basal Cell Adenoma, Solid Type Canalicular Adenoma (Monomorphic Adenoma) Carcinoma Ex Pleomorphic Adenoma Low grade Mucoepidermoid Carcinoma Low-Grade Salivary Duct Carcinoma MALT Lymphoma Mucoepidermoid carcinoma Myoepithelial Carcinoma Myoepithelioma Oncocytoma Pleomorphic adenoma Pleomorphic Adenoma, Cellular Variant Polymorphous Low Grade Adenocarcinoma Salivary Duct Carcinoma Sebaceous Lymphadenoma Small Cell Carcinoma (of parotid) Warthin's Tumor Normal Histology Sinonasal Benign Antrochoanal Polyp Nasal Glioma Respiratory Epithelial Adenomatoid Hamartoma Inflammatory Chronic Sinusitis Sinonasal Polyp Neoplastic Glomangiopericytoma Juvenile Nasopharyngeal Angiofibroma Juvenile Psammomatoid Ossifying Fibroma Lobular Capillary Hemangioma Melanoma Plasmacytoma Rosai-Dorfman Disease Schneiderian Papilloma with Dysplasia Schneiderian Papilloma, Inverted Type Schneiderian Papilloma, Oncocytic Type Solitary Fibrous Tumor T/NK Cell Lymphoma Trachea Neoplastic Basaloid Squamous Cell Carcinoma Hematopathology Bone Marrow Neoplastic Systemic Mastocytosis with AHNMD Liver Neoplastic Histiocytic Sarcoma Lymph Nodes Benign Dermatopathic Lymphadenitis Infectious Cat Scratch Disease Mycobacterium Avium Intracellulare Inflammatory Kikuchi Disease Kimura's Disease Reactive Amyloidosis Rosai-Dorfman Disease Osseous Neoplastic Plasmacytoma Spleen Benign Epidermoid Cyst Inflammatory Pseudotumor Vascular Hemangioendothelioma Lower Respiratory Lung Benign Tumorlets Indeterminant Lymphangioleiomyomatosis Infectious CMV pneumonitis Coccidioidomycosis Mucormycosis Pneumocystis Carinii Inflammatory Malakoplakia Microscopic Polyangiitis Wegener Granulomatosis Malignant Sarcomatoid Carcinoma, Carcinosarcoma Type Neoplastic Adenocarcinoma Adenocarcinoma, Fetal Type Adenocarcinoma,Micropapillary Type Adenoid Cystic Carcinoma Adenosquamous Carcinoma Atypical Carcinoid Bronchioloalveolar Carcinoma, Mucinous subtype Bronchioloalveolar Carcinoma, Non-mucinous subtype Carcinoid Inflammatory Myofibroblastic Tumor Large Cell Neuroendocrine Carcinoma Peripheral Carcinoid Pleuropulmonary Blastoma Small Cell Carcinoma Squamous cell carcinoma Mediastinum Epithelial Benign Bronchogenic Cyst Lymph Nodes Benign Sarcoidosis Mediastinum Neoplastic Yolk Sac Tumor Neoplastic Benign Teratoma Malignant Rhabdoid Tumor Neural Neoplastic Ganglioneuroma Schwannoma Thymus Neoplastic Neuroendocrine Carcinoma Thymic Carcinoid Thymic carcinoma Thymic Carcinoma, Lymphoepithelial Type Thymic Carcinoma, Mucoepidermoid Type Thymoma Thymoma, A type Thymoma, B2 type Thymoma, B3 type Normal Histology Vascular Neoplastic Lymphangioma Serosal Membranes Peritoneum Benign Benign multicystic peritoneal mesothelioma Gliomatosis Peritonei Leiomyomatosis Peritonealis Disseminata Peritoneal inclusion cyst Indeterminant Inflammatory Myofibroblastic Tumor Neoplastic Desmoplastic Small Round Cell Tumor Peritoneal Mesothelioma, Epithelioid Type Well-differentiated Papillary Mesothelioma Pleura Neoplastic Angiosarcoma Mesothelioma, Biphasic Type Mesothelioma, Epithelioid Type Solitary Fibrous Tumor Reactive Fibrous Pleurisy Skin Adnexal Benign Nevus Sebaceous (Organoid Nevus) Follicular Neoplasm Pilar Cyst Trichoblastoma Trichoepithelioma Tricholemmoma Neoplastic Adenoid Cystic Carcinoma Chondroid syringoma (Benign mixed tumor) Cylindroma Eccrine Spiradenoma Pilomatricoma Syringoma Trichofolliculoma Sebaceous Neoplasm Sebaceous Adenoma Sebaceous Carcinoma Sweat Gland Neoplasm Microcystic Adnexal Carcinoma Steatocystoma Dermis Autoimmune Morphea Benign Collagenous Elastotic Marginal Plaque Digital Mucous Cyst Xanthoma Indeterminant Cutaneous Rosai-Dorfman Disease Inflammatory Granuloma annulare Granuloma Faciale Rosacea Urticaria Metabolic Calcinosis Cutis Necrobiosis Lipoidica Neoplastic Dermatofibroma Dermatofibrosarcoma Protuberans Giant Cell Fibroblastoma Ear Reactive Chondrodermatitis Nodularis Helicis Epidermis Autoimmune Bullous Pemphigoid Discoid Lupus Graft Versus Host Disease Benign Warty Dyskeratoma Blistering Darier Disease Dermatitis Herpetiformis Erythema Multiforme Hailey-Hailey disease Infectious Molluscum Contagiosum Inflammatory Eczematous dermatitis Lichen Planus Psoriasis Stasis Dermatitis Neoplastic Basal cell carcinoma, Fibroepithelioma of Pinkus Clear Cell Acanthoma Keratoacanthoma Seborrheic Keratosis Reactive Icthyosis Epithelial Reactive Acanthosis Nigrans Infectious Bacterial Syphilis Fungal Coccidioidomycosis Dermatophytosis Sporotrichosis Inflammatory Benign Xanthelasma Neoplastic Juvenile Xanthogranuloma Lymphoid Neoplastic Mycosis Fungoides Melanocytic Benign Nevus, Intradermal Nevus, Junctional Neoplastic Desmoplastic Melanoma Lentigo Maligna Melanoma, Acral Lentiginous Melanoma, Nodular Type Melanoma, Superficial Spreading Type Nevus, Neurotized Spitz Nevus Neural Neoplastic Neurothekeoma Neuroendocrine Neoplastic Merkel Cell Carcinoma Subcutaneous Tissue Inflammatory Erythema Nodosum Thrombosis Lupus with vascular thrombi Vascular Autoimmune Cryoglobulinemia Benign Angiokeratoma Infectious Bacillary Angiomatosis Neoplastic Angiosarcoma Epithelioid Hemangioma Kaposi Sarcoma Lymphangioma Soft Tissue Fibrous Benign Fibro-osseous Pseudotumor of Digits Fibroma of Tendon Sheath Fibrous Hamartoma of Infancy Inclusion Body Fibromatosis Ischemic fasciitis Nodular Fasciitis Palmar Fibromatosis Proliferative Fasciitis Indeterminant Deep (Desmoid) Fibromatosis Neoplastic Calcifying Aponeurotic Fibroma Desmoplastic Fibroblastoma Plexiform fibrohistiocytic tumor Solitary Fibrous Tumor Reactive Myositis Ossificans Proliferative Myositis Joints Benign Giant Cell Tumor of Tendon Sheath Juxta-articular Myxoma Inflammatory Pigmented Villonodular Synovitis Metabolic Gouty Tophi Pseudo-gout Lipomatous Benign Angiolipoma Myxolipoma Neoplastic Lipoblastoma Liposarcoma, Dedifferentiated Type Liposarcoma, Myxoid and Round Cell Type Liposarcoma, Myxoid Type Liposarcoma, Pleomorphic Type Liposarcoma, Well-Differentiated Type (Atypical Lipomatous Tumor) Pleomorphic Lipoma Spindle Cell Lipoma Well-differentiated liposarcoma, Sclerosing Fibroinflammatory Variant Myogenic Neoplastic Leiomyosarcoma Leiomyosarcoma, Epithelioid Type Myoepithelioma Rhabdomyosarcoma, Alveolar type Rhabdomyosarcoma, Embryonal Type Neural Neoplastic Malignant Peripheral Nerve Sheath Tumor Subcutaneous Tissue Infectious Madurella Mycetoma Metabolic Tumoral Calcinosis Neoplastic Glomangioma Glomus Tumor Uncertain Lineage Neoplastic Clear Cell Sarcoma Epithelioid Sarcoma Extraskeletal Myxoid Chondrosarcoma Intramuscular Myxoma Ossifying Fibromyxoid Tumor Sclerosing Epithelioid Fibrosarcoma Synovial Sarcoma Vascular Benign Lymphangioma