- H1N1 influenza virus, in culture
- Haantan
- Haemophilus, in cultures
- Haemophilus aegyptius, in cultures
- Haemophilus influenzae, in cultures
- Hair, fungal culture of
- Hair preparations, effect on EEG
- Hairy cell leukemia, LAP levels in
- Hallucination
- Haloperidol
- Haloperidol toxicity
- Hamartoma, breast ultrasound for
- Ham’s test
- Hand, MRI of
- Hantavirus, in cultures
- Haptoglobin
- Hartnup’s disease
- Hashimoto’s thyroiditis
- HAV (hepatitis A virus)
- Hay fever
- HCG (human chorionic gonadotropin)
- HCT (calcitonin)
- HDLC (high-density lipoprotein cholesterol)
- HDV (hepatitis D virus)
- Head
- Headache
- Head and neck cancer
- Head injury
- Healing, fracture
- Hearing loss/deafness
- Hearing test
- Heart
- Heartburn. See also Gastroesophageal reflux (GER)
- Heart chamber disorder
- Heart disease
- Heart failure (HF). See also Cardiac failure
- Heart rate, ECG and
- Heart rhythm
- Heart scan, myocardial perfusion
- Heart transplant rejection, cyclosporine for
- Heart valve function, ECG and
- Heart vessel calcium, CT for
- Heat sensitivity, RAIU and
- Heinz bodies
- Helical CT
- Helicobacter pylori antibody
- Helicobacter pylori colonization
- Helicobacter pylori infection
- HELLP syndrome of pregnancy, alanine aminotransferase levels in
- Helmet cell
- Helminths
- Hemangioma
- Hematemesis, UGI series in
- Hematocele, scrotal ultrasound for
- Hematocrit
- Hematologic disorders
- Hematoma
- Hematopoiesis, vitamin B 12 in
- Hematuria
- Heme synthesis
- Hemochromatosis
- Hemoconcentration
- Hemodialysis. See also Dialysis; Renal dialysis
- Hemoglobin
- Hemoglobin A
- Hemoglobin A 2
- Hemoglobin C
- Hemoglobin C crystals
- Hemoglobin C disease
- Hemoglobin C Harlem anemia, sickle cell screen in
- Hemoglobin content
- Hemoglobin D, electrophoresis and
- Hemoglobin E disease, electrophoresis and
- Hemoglobin electrophoresis
- Hemoglobin F,
- Hemoglobin H, electrophoresis and
- Hemoglobin M
- Hemoglobinopathies
- Hemoglobinopathy
- Hemoglobin S
- Hemoglobinuria. See also Paroxysmal nocturnal hemoglobinuria (PNH)
- Hemolysis
- Hemolytic anemia
- Hemolytic disease
- Hemolytic disorders
- Hemolytic jaundice, bilirubin levels in
- Hemolytic transfusion reaction, hemosiderin levels in
- Hemolyzed specimen, as interfering factor in LA testing
- Hemoperitoneum
- Hemophilia
- Hemophilic arthritis, synovial fluid analysis in
- Hemoptysis
- Hemorrhage. See also Bleeding disorders; Blood loss
- Hemorrhagic cystitis, viral culture in
- Hemorrhagic disease of newborn, vitamin K levels in
- Hemorrhagic fever, viral culture in
- Hemorrhagic pericarditis, pericardial fluid analysis in
- Hemorrhoid
- Hemosiderin
- Hemosiderin stain
- Hemosiderosis
- Hemostasis
- Hemostatic platelet plug
- Hemothorax, pleural fluid analysis in
- Hepadnaviridae family
- Heparin, NTx levels and
- Heparin cofactor assay
- Hepatectomy, antithrombin III in
- Hepatic abscess
- Hepatic adenoma, ultrasonography of
- Hepatic carcinoma
- Hepatic coma
- Hepatic cyst
- Hepatic damage
- Hepatic disease. See also Cirrhosis
- Hepatic failure
- Hepatic injury. See also Hepatic damage
- Hepatic insufficiency, testosterone in
- Hepatic jaundice, bilirubin levels in
- Hepatic metastasis, RF ablation of
- Hepatic necrosis, amino acids in
- Hepatic obstruction
- Hepatic porphyria, urine porphyrins in
- Hepatic transplantation, antithrombin III in
- Hepatic tumor. See also Hepatic carcinoma
- Hepatitis
- Hepatitis A antibody
- Hepatitis B antigen/antibody
- Hepatitis C antibody
- hepatitis d antibody
- Hepatitis E antibody
- Hepatobiliary scan
- Hepatobiliary system disorders
- Hepatobiliary ultrasonography
- Hepatoblastoma, AFP levels in
- Hepatocellular carcinoma
- Hepatocellular disease/disorders
- Hepatolenticular degeneration, calcium levels in
- Hepatoma
- Hepatomegaly, ultrasonography in
- Hepatosplenomegaly, in infectious mononucleosis
- Hepatotoxic drugs, BUN and
- Heptacarboxylporphyrin
- HER-2 (human epidermal growth factor receptor 2)/neu oncoprotein, in breast cancer
- HER-2-NEU gene
- Hereditary angioedema, C4 levels in
- Hereditary atransferrinemia, transferrin levels in
- Hereditary elliptocytosis, hemoglobin levels in
- Hereditary hyperoxaluria, oxalate levels in
- Hereditary hypophosphatemia, LAP levels in
- Hereditary methemoglobinemia, Hgb M levels in
- Hereditary persistence
- Hereditary spherocytosis
- Hereditary telangiectasia, bleeding time in
- Hernia
- Hernia repair, inguinal, antisperm antibodies after
- Herniated disk
- Heroin abuse
- Herpangina, viral culture in
- Herpes
- Herpes infection, platelet count in
- Herpes simplex virus (HSV)
- Heterophil antibody test
- Heterophoria, intraocular muscle function in
- Heterotropia, intraocular muscle function in
- Heterozygous alleles
- Heterozygous biochemical enzyme defect
- HEV (hepatitis E)
- Hexacarboxylporphyrin (porphyrin)
- Hexosaminidase A and B
- Hexose monophosphate shunt
- Hiatal hernia
- High altitude
- High-altitude hypoxia, erythropoietin level in
- High-density lipoprotein cholesterol (HDLC)
- High-fat diet, . See also Fatty diet
- High-frequency hearing loss, SRT in
- High-protein diet, ketones and
- High-risk medications, visual field test in patient using
- High-stress lifestyle, cardiac scoring for
- Hip
- Hirschsprung’s disease, barium enema in
- Hirsutism
- Histidine
- Histoplasma, lung biopsy for
- Histoplasma capsulatum, fungal antibodies in
- Histoplasma capsulatum, in cultures
- Histoplasmosis
- HLA-B27 (human leukocyte antigen B27)
- HLA typing
- Hodgkin’s disease
- Holter monitor
- Homocysteine
- Homocystine
- Homocystinuria
- Homovanillic acid (HVA)
- Homozygous alleles
- Hookworm, in stool culture
- Hookworm infection
- Hordeolum, slit-lamp biomicroscopy in
- Hormonal disturbance, radiography in
- Hormonal therapy, breast biopsy in
- Hormones, effects on LH levels
- Horseshoe kidney
- Howell-Jolly bodies
- HP (haptoglobin)
- HPV (human papillomavirus)
- HSV (herpes simplex virus), in cultures
- HTLV-I/HTLV-II (human T-lymphotropic virus, type I and II)
- Human chorionic gonadotropin (HCG)
- Human epidermal growth factor receptor 2 (HER-2)/neu oncoprotein, in breast cancer
- Human Genome Project
- Human growth hormone
- Human immunodeficiency virus/HIV infection
- Human leukocyte antigen (HLA)
- Human leukocyte antigen B27 (HLA-B27)
- Human papillomavirus (HPV)
- Human T-lymphotropic virus type I and II antibodies
- Huntington’s chorea
- HVA (homovanillic acid)
- Hyaline casts, in urinalysis
- Hyaline membrane disease, amniotic fluid analysis and
- Hyaline membrane disease, plasminogen level in
- Hydatidiform mole
- Hydration, rapid, A/G ration in
- Hydrazine exposure, vitamin B 6 levels in
- Hydrocele, scrotal ultrasound for
- Hydrocephalus
- Hydrocephaly, CT in
- Hydrocortisone
- Hydrogen breath test, lactose intolerance in
- Hydronephrosis
- Hydrops fetalis, parvovirus B19 in
- Hydrosalpinx, pelvic CT in
- 3-Hydroxy, 3-methylglitaric aciduria
- 5-Hydroxyindoleacetic acid (5-HIAA)
- Hydroxylysine
- Hydroxyproline
- Hymenolepiasis infection, O & P in
- Hyperaldosteronism
- Hyperalimentation, magnesium level and
- Hyperalimentation therapy
- Hyperbaric oxygenation, blood gas analysis in
- Hypercalcemia
- Hypercalciuria, oxalate levels in
- Hypercapnia, blood gas analysis in
- Hypercapnic state
- Hyperchromia
- Hyperchromic cell
- Hypercortisolism, NTx levels in
- Hypereosinophilic syndrome
- Hypergammaglobulinemia, anion gap in
- Hypergastrinemia, calcitonin stimulation test in
- Hyperglycemia
- Hyperhomocysteinemia
- Hyperhomocystinuria
- Hyperinsulinemic hypoglycemia, insulin levels in
- Hyperinsulinism, phosphorus levels in
- Hyperkalemia
- Hyperlipidemia
- Hyperlipoproteinemia
- Hypernatremia
- Hyperopia, refraction in
- Hyperoxaluria
- Hyperparathyroidism
- Hyperphosphatemia
- Hyperpituitarism, hGH levels in
- Hyperprolactinemia
- Hyperpyrexia, semen analysis in
- hypersensitivity pneumonitis serology
- Hypersensitivity reaction, bone marrow biopsy in
- Hypersplenism
- Hypertension
- Hypertensive retinopathy, FA in
- Hyperthermia
- Hyperthyroidism
- Hypertriglyceridemia
- Hypertrophic anal papillae, proctosigmoidoscopy for
- Hypertrophic cardiomyopathy, TEE in
- Hyperventilation
- Hypervitaminosis D, alkaline phosphatase levels in
- Hypervolemia
- Hypoalbuminemia
- Hypoaldosteronism
- Hypocalcemia
- Hypocalciuric hypercalcemia, blood calcium levels in
- Hypochloremic state, blood gas analysis in
- Hypochlorhydria, vitamin B 12 and
- Hypochromia
- Hypochromic anemia
- Hypochromic cell
- Hypofibrinogenemia
- Hypoglycemia
- Hypogonadism
- Hypokalemia
- Hypolipoproteinemia
- Hypomagnesemia
- Hyponatremia
- Hypoparathyroidism
- Hypophosphatasia, alkaline phosphatase levels in
- Hypophosphatemia, LAP levels in
- Hypopituitarism
- Hypoproteinemia
- Hypoprothrombinemia, vitamin K levels in
- Hypospadias, perineal, retrograde urethrography in
- Hypotension, catecholamine levels in
- Hypothalamic disorder/dysfunction
- Hypothermia
- Hypothyroidism
- Hypoventilation
- Hypovolemia
- Hypoxemia
- Hypoxemic state, gynecologic laparoscopy and
- Hypoxia
- Hypoxic shock, CK-MM in
- Hypoxic state, abdominal laparoscopy and
- Hysterogram
- Hysterosalpingography
- Hysteroscopy