The Kidney.- Anatomy, Histology, Ultrastructure.- Nephron and Collecting Duct Structure in the Kidney, Rat.- Unique Features of Anatomy, Histology, and Ultrastructure, Kidney, Mouse.- Neoplasms.- Renal Carcinogenesis, Rat.- Oncocytoma, Kidney, Rat.- Mesenchymal Tumor, Kidney, Rat.- Nephroblastoma, Kidney, Rat.- Lipomatous Tumors, Kidney, Rat.- Adenoma, Adenocarcinoma, Kidney, Mouse.- Adenoma, Kidney, Syrian Hamster.- Adenocarcinoma, Kidney, Syrian Hamster.- Renal Cell Adenoma and Carcinoma, Rat.- Angioma, Angiosarcoma, Kidney, Syrian Hamster.- Estrogen-Induced Malignant Tumor, Kidney, Syrian Hamster.- Nonneoplastic Lesions.- Immune Mechanisms in Injury to Glomeruli and Tubulo-Interstitial Tissue.- Chronic Progressive Nephrosis, Rat.- Infarction, Kidney, Rat, Mouse.- Papillary Necrosis, Rat.- Renal Tubular Karyocytomegaly, Rat.- Glomerulonephritis, Mouse.- Interstitial Nephritis, Mouse.- Suppurative Nephritis, Pyelonephritis, Mouse.- Suppurative Nephritis, Pyelonephritis, Rat.- Chloroform Nephrosis, Male Mouse.- Acute Tubular Lesions, Kidney, Rat.- Daunomycin-Induced Nephropathy, Rat.- Pigment Deposition, Kidney, Mouse.- Spontaneous Hypertension, Morphologic Aspects, Rat.- Effect of Experimental Diabetes Mellitus, Kidney, Rat.- Experimental Renal Effects of Analgesics, Rat.- Diphenylthiazole-Induced Renal Cystic Disease, Rat.- Congenital and Inherited Disorders.- Spontaneous Hydronephrosis, Rat.- Nephronophthisis, Mouse.- Hereditary Hydronephrosis, Mouse.- Parasitic Infections.- Klossiellosis, Kidney, Mouse, Rat.- Renal Pelvis, Ureters, Urinary Bladder, Urethra.- Histology Ultrastructure.- Histology, Ultrastructure, Urinary Tract, Mouse.- Transitional Epithelium, Bladder, Rat.- Neoplasms.- Hyperplasia, Urinary Bladder, Rat.- Classification and Differential Diagnosis of Neoplasms, Urinary Bladder, Rat.- Carcinogenesis, Urinary Tract, Rat.- Transitional Cell Carcinoma, Bladder, Rat.- Transitional Cell Carcinoma, Urinary Tract, Mouse.- Papilloma, Urinary Bladder, Rat.- Squamous Cell Carcinoma, Urinary Bladder, Rat.- Adenocarcinoma, Urinary Bladder, Rat.- Undifferentiated Carcinoma, Urinary Bladder, Rat.- Non-neoplastic Lesions.- Calcium Oxalate Urolithiasis, Rat.- Renal Calcifications, Mouse.- Phosphate Urolithiasis, Rat.- Urologic Syndrome, Mouse.- Spontaneous Renal Amyloidosis, Syrian Hamster.- Parasitic Infections.- Trichosomoides crassicauda Infection, Urinary Bladder, Rat.