Guide to Diagnostic Tests
- β2-M (β2-microglobulin)
- Macroamylasemia
- Macrocytosis
- Magnesium
- Magnesium deficiency
- Magnetic resonance angiography/venography
- Magnetic resonance cholangiopancreatography
- Malabsorption
- MALT lymphoma (extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue)
- Mammogram
- Mantle cell lymphoma
- MCH (mean corpuscular hemoglobin)
- MCTD (mixed connective tissue disease)
- Mean corpuscular hemoglobin
- Mediastinal large B-cell lymphoma
- Mediastinal mass
- Medullary thyroid carcinoma
- MELD (Model for End-Stage Liver Disease) scoring system
- MEN
- Mendelson syndrome
- Meningoencephalitis parasitic
- Merlin gene mutations
- MERS
- MERS-CoV (Middle East respiratory syndrome coronavirus)
- Mesalamine
- Mesenteric angiography
- MetHb (methemoglobin whole blood)
- Methemoglobinemia
- Methicillin-resistant Staphylococcus aureus
- Methylenetetrahydrofolate reductase
- Methylenetetrahydrofolate reductase enzyme deficiency
- Metoclopramide
- Metolazone
- MF (mycosis fungoides)
- Mg2+ (magnesium)
- Mg2+ (magnesium) deficiency
- MIBG (meta-iodobenzyl-guanidine)
- Microalbuminuria
- Microcytosis
- Middle East respiratory syndrome (MERS)
- Middle East respiratory syndrome coronavirus
- Minoxidil
- Mitochondrial antibodies
- Mixed connective tissue disease
- MMA (methylmalonic acid)
- MMR gene mutations (hereditary colorectal cancer)
- Mobitz type I block
- Mobitz type II block
- Model for End-Stage Liver Disease scoring system
- Monkeypox virus
- Monoarthritis
- Monospot
- Morphine
- MPL mutation
- M-protein
- MR (magnetic resonance) enterography
- MRA/MRV (magnetic resonance angiography/venography)
- MRCP (magnetic resonance cholangiopancreatography)
- MRSA (methicillin-resistant Staphylococcus aureus)
- MTHFR (methylenetetrahydrofolate reductase) enzyme deficiency
- MTHFR (methylenetetrahydrofolate reductase) mutation
- Multiple endocrine neoplasia (MEN)
- Mumps
- Murmurs
- MuSK (muscle-specific kinase) antibodies
- Myasthenia gravis
- Mycosis fungoides
- Myelodysplastic syndrome
- Myelography
- Myeloproliferative neoplasms
- Myocardial injury
- Myocardial ischemia
- Myocardial perfusion scan
- Myocarditis infectious
- Myositis
- Myotonic dystrophy
- Myxedema