Galactokinase deficiency Galactosylceramidase deficiency Ganglioneuroblastoma Ganglioneuroma Gangrene Gartners duct cyst Gastric ulcer Gastrinoma Gastritis Gastritis - Helicobacter pylori Gastroenteritis - viral Gastroesophageal reflux disease Gastrointestinal perforation Gastroschisis Gaucher disease Gender identity disorder General paresis Generalized tonic-clonic seizure Genital herpes Genu valgum German measles Gestational diabetes Giantism Giardia Gilles de la Tourette syndrome Gingivitis Gingivostomatitis Glanzmanns disease Glioma - optic Glomerulonephritis Glomerulonephritis - membranoproliferative (type I) Glomerulonephritis - post-streptococcal Glomus jugulare tumor Glomus tympanum tumor Glossitis Glucagonoma Glue ear Glycogen storage disease type V Goiter Gonadal deficiency Gonadotropin deficiency Gonococcal bacteremia Gonococcal pharyngitis Graft rejection Graft-versus-host disease Gram-negative meningitis Granuloma annulare Granulomatous arthritis Group B streptococcal septicemia of the newborn Gumma Guttate psoriasis