MAC Lung Disease
Macrocephaly
Macrocytic Anemia
Macrocytosis
Macroglossia
Macular Degeneration, Age-Related
Macular Hole
Macular Pucker
Madarosis
Maffucci Syndrome
Mageirocophobia (Fear of Cooking)
Magnesium Rich Food
Mal de Débarquement Syndrome (MdDS)
Malabsorption
Maladaptive Daydreaming
Malaria
Malassezia (Pityrosporum) Folliculitis
Male Breast Cancer
Male Infertility
Male Pattern Baldness (Androgenic Alopecia)
Male Yeast Infection
Malignant Hypertension
Malignant Hyperthermia
Malignant Neoplasm
Malignant Soft Tissue Tumors
Mallet Finger
Mallet Toes
Mallory Weiss Tear
Malnutrition
Malocclusion
Malrotation
MALT Lymphoma
Mammary Duct Ectasia
Mania
Mantle Cell Lymphoma
Maple Syrup Urine Disease
Marasmus
Marburg Virus Disease
Marcus Gunn Pupil
Marfan Syndrome
Marginal Zone Lymphoma (MZL)
Marionette Lines
Mastitis
Mastocytosis
Mastoiditis
Mayer-Rokitansky-Küster-Hauser Syndrome
May-Thurner Syndrome
MCAD Deficiency
McArdle Disease (GSD5)
McCune-Albright Syndrome
MCL Tear
Measles
Meatal Stenosis
Meconium Aspiration Syndrome
Meconium Ileus
Median Arcuate Ligament Syndrome (MALS)
Mediastinal Tumor
Mediastinitis
Mediterranean Diet
Medullary Sponge Kidney (Cacchi-Ricci Disease)
Medullary Thyroid Cancer (MTC)
Medulloblastoma
Megalencephaly (Macrencephaly)
Megaloblastic Anemia
Megalocornea
Megalophobia
Megaureter
Meibomian Gland Dysfunction
Meige Syndrome
Melanoma
MELAS Syndrome
Melasma
Melena (Black Stool)
Melioidosis
Melkersson-Rosenthal Syndrome (MRS)
Melorheostosis
Membranous Nephropathy
Membranous Urethra
Memory Loss
Ménière’s Disease
Meningioma
Meningitis
Meningococcal Disease
Meningococcemia
Meningoencephalitis
Menkes Disease
Menopause
Menstrual Migraines (Hormone Headaches)
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
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
Microphthalmia and Anophthalmia
Microscopic Colitis
Microscopic Polyangiitis (MPA)
Microtia
Microvascular Angina
Microvascular Coronary Disease (Small Vessel Disease)
Microvascular Ischemic Disease
Middle East Respiratory Syndrome (MERS)
Migraine Aura
Migraine Hangover (Postdrome)
Migraine Headaches
Migraines in Children
Mild Cognitive Impairment
Milia
Milk Allergy
Milk Bleb
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
Monocytosis
Monomorphic Ventricular Tachycardia
Mononeuropathy
Mononucleosis
Mood Disorders
Mood Swings
Morning Glory Syndrome
Morning Sickness
Morquio Syndrome
Morton’s Neuroma
Motion Sickness
Mottled Skin
Mouth Sore
Mouth Ulcer
Movement Disorders
Moyamoya Disease
Mpox
MRSA (Methicillin-resistant Staphylococcus aureus)
MS Hug
Mucinous Carcinoma
Mucormycosis
Mucosal Melanoma
Mucositis
Muir Torre Syndrome
Multifocal Atrial Tachycardia
Multi-Infarct Dementia
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 (Factitious disorder imposed on self)
Muscle Cramps
Muscle Pain
Muscle Stiffness
Muscle Strains
Muscular Dystrophy
Musculoskeletal Pain
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 (Myelodysplasia)
Myelofibrosis
Myeloid Sarcoma
Myelomeningocele
Myelopathy
Myeloproliferative Neoplasms
Myelosuppression (Bone Marrow Suppression)
Myocardial Bridge
Myocardial Contusion
Myocardial Ischemia
Myocardial Rupture
Myocarditis
Myoclonic Seizure
Myoclonus (Muscle Twitch)
Myofascial Pain Syndrome
Myopathy
Myopericarditis
Myopia (Nearsightedness)
Myositis
Myositis Ossificans
Myotonia
Myotonia Congenita
Myotonic Dystrophy
Mysophobia (Germophobia)
Myxofibrosarcoma
Myxoid Cyst
Myxoid Liposarcoma
Myxoma