“Explore our comprehensive A-Z guide on diseases and conditions. Discover detailed information on definitions, symptoms, causes, and treatments to better understand various health issues.”
- MAC Lung Disease
- Machado-Joseph Disease
- Macrocephaly
- Macrocytic Anemia
- Macrocytosis
- Macroglossia
- Macular Degeneration
- Macular Hole
- Macular Pucker
- Maffucci Syndrome
- Mageirocophobia
- Mal de Débarquement Syndrome (MdDS)
- Malabsorption
- Maladaptive Daydreaming
- Malaria
- Malassezia (Pityrosporum) Folliculitis
- Male Breast Cancer
- Male Infertility
- Male Pattern Baldness
- Male Yeast Infection
- Malignant Hypertension
- Malignant Hyperthermia
- Malignant Neoplasm
- Malignant Peripheral Nerve Sheath Tumor
- Malignant Soft Tissue Tumors
- Mallet Finger
- Mallet Toe
- Mallory Weiss Tear
- Malnutrition
- Malocclusion
- Malrotation in Children
- MALT Lymphoma
- Mammary Duct Ectasia
- Mania
- Mantle Cell Lymphoma
- Maple Syrup Urine Disease
- Marasmus
- Marburg Virus Disease
- Marfan Syndrome
- Marfan Syndrome and Pregnancy
- Marfan Syndrome and the Heart
- Marginal Cord Insertion
- Marginal Zone Lymphoma (MZL)
- Marijuana (Weed) Withdrawal
- Marionette Lines
- Mast Cell Activation Syndrome
- Mastitis
- Mastocytosis
- Mastoiditis
- May-Hegglin Anomaly
- May-Thurner Syndrome
- Mayer-Rokitansky-Küster-Hauser Syndrome
- MCAD Deficiency
- McArdle Disease (GSD5)
- McCune-Albright Syndrome
- MCL Tear
- Measles
- Meatal Stenosis
- Meckel’s Diverticulum
- Meconium Aspiration Syndrome
- Meconium Ileus
- Median Arcuate Ligament Syndrome (MALS)
- Mediastinal Tumor
- Mediastinitis
- Medullary Sponge Kidney (Cacchi-Ricci Disease)
- Medullary Thyroid Cancer (MTC)
- Medulloblastoma
- Megalencephaly (Macrencephaly)
- Megaloblastic Anemia
- Megalocornea
- Megalophobia
- Megaureter
- Meibomian Gland Dysfunction
- Meige Syndrome
- Melanoma
- Melanophobia
- Melanosis Coli
- MELAS Syndrome
- Melasma
- Melioidosis
- Melkersson-Rosenthal Syndrome
- Melorheostosis
- Membranous Nephropathy
- Menarche
- Ménière’s Disease
- Meningioma
- Meningitis
- Meningococcal Disease
- Meningococcemia
- Meningoencephalitis
- Menkes Disease
- Menometrorrhagia
- Menopause
- Menorrhagia
- Menstrual Migraines
- Mental Health Disorders
- Meralgia Paresthetica
- Mercury Poisoning
- Merkel Cell Carcinoma
- Mesenteric Ischemia
- Mesenteric Lymphadenitis
- Mesenteric Panniculitis
- Mesothelioma
- Metabolic Acidosis
- Metabolic Alkalosis
- Metabolic Bone Disease
- Metabolic Dysfunction-Associated Steatohepatitis
- Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD)
- Metabolic Encephalopathy
- Metabolic Syndrome
- Metacarpal Fracture
- Metachromatic Leukodystrophy
- Metastasis (Metastatic Cancer)
- Metastatic Breast Cancer
- Metatarsalgia
- Metatarsus Adductus
- Methemoglobinemia
- Metopic Craniosynostosis (Trigonocephaly)
- Microcephaly
- Microcytic Anemia
- Microcytosis
- Micrognathia
- Microhematuria
- Micropenis
- Microperforate Hymen
- Microphobia
- Microphthalmia and Anophthalmia
- Microscopic Colitis
- Microscopic Polyangiitis
- Microtia
- Microvascular Angina
- Microvascular Coronary Disease
- Microvascular Ischemic Disease
- Middle East Respiratory Syndrome
- Migraine Aura
- Migraine Hangover
- Migraine Headaches
- Migraines in Children
- Mild Cognitive Impairment
- Milia
- Milk Allergy
- Miller Fisher Syndrome
- Miller-Dieker Syndrome
- Mirizzi Syndrome
- Miscarriage
- Misophonia
- Mitochondrial Diseases
- Mitral Valve Disease
- Mitral Valve Prolapse
- Mitral Valve Regurgitation
- Mitral Valve Stenosis
- Mixed Connective Tissue Disease
- Moebius Syndrome
- Molar Pregnancy
- Mold Allergy
- Moles
- Molluscum Contagiosum
- Monoclonal Gammopathy of Renal Significance
- Monoclonal Gammopathy of Undetermined Significance
- Monocytosis
- Monomorphic Ventricular Tachycardia
- Mononeuropathy
- Mononucleosis
- Monteggia Fracture
- Mood Disorders
- Morning Glory Syndrome
- Morning Sickness
- Morquio Syndrome
- Morton’s Neuroma
- Mosquito Bites
- Motion Sickness
- Mouth Breathing
- Mouth Sore
- Mouth Ulcer
- Movement Disorders
- Moyamoya Disease
- Mpox
- MRSA (Methicillin-resistant Staphylococcus aureus)
- Mucinous Carcinoma
- Mucormycosis
- Mucosal Melanoma
- Mucositis
- Muir Torre Syndrome
- Multi-Infarct Dementia
- Multifocal Atrial Tachycardia
- Multiple Chemical Sensitivity
- Multiple Endocrine Neoplasia (MEN)
- Multiple Myeloma
- Multiple Organ Dysfunction Syndrome
- Multiple Sclerosis (MS)
- Multiple System Atrophy
- Multiple System Atrophy with Orthostatic Hypotension
- Multisystem Inflammatory Syndrome in Children (MIS-C)
- Mumps
- Munchausen Syndrome
- Muscle Atrophy
- Muscle Contusion
- Muscle Spasms
- Muscle Strains
- Muscular Dystrophy
- Mustard Allergy
- MUTYH-Associated Polyposis (MAP)
- Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS)
- Myasthenia Gravis (MG)
- Mycoplasma
- Mycosis Fungoides
- Mycotic Nails
- Myelin Oligodendrocyte Glycoprotein Antibody-Associated Disease (MOGAD)
- Myelodysplastic Syndrome
- Myelofibrosis
- Myeloid Sarcoma
- Myelomeningocele
- Myelopathy
- Myeloproliferative Neoplasms
- Myelosuppression
- Myocardial Bridge
- Myocardial Contusion
- Myocardial Ischemia
- Myocardial Rupture
- Myocarditis
- Myoclonic Seizure
- Myofascial Pain Syndrome
- Myopathy
- Myopericarditis
- Myopia (Nearsightedness)
- Myositis
- Myositis Ossificans
- Myotonia
- Myotonia Congenita
- Myotonic Dystrophy
- Mysophobia (Germophobia)
- Myxofibrosarcoma
- Myxoid Cyst
- Myxoid Liposarcoma
- Myxoma