Filtering
- Macroglossia
- Macrophage Activation Syndrome
- Maffucci Syndrome
- Malaria
- Mal De Debarquement Syndrome
- Malignant Germ Cell Tumor
- Malignant Hyperthermia
- Malignant Mesenchymoma
- Malignant Mesothelioma
- Malignant Migrating Partial Seizures of Infancy
- Malignant Mixed Mullerian Tumor
- Malignant Peripheral Nerve Sheath Tumor
- Mannosidosis, Beta A, Lysosomal
- Mansonelliasis
- Mantle Cell Lymphoma
- Maple Syrup Urine Disease
- Marburg Hemorrhagic Fever
- Marcus Gunn Phenomenon
- Marfan Syndrome
- Marginal Zone Lymphoma
- Marinesco-Sjogren Syndrome
- Marshall Syndrome
- MASS Phenotype
- Mast Cell Activation Syndrome
- Mastocytosis
- Maternal Hyperphenylalaninemia
- Maternally Inherited Diabetes and Deafness
- Maturity-onset Diabetes of the Young
- Maturity-onset Diabetes of the Young, Type 1
- Maturity-onset Diabetes of the Young, Type 2
- Maturity-onset Diabetes of the Young, Type 3
- Maxillofacial Dysostosis
- May-Thurner Syndrome
- McCune-Albright Syndrome
- Measles
- Meckel Syndrome
- Meconium Aspiration Syndrome
- MECP2 Duplication Syndrome
- Medium-chain Acyl-coenzyme A Dehydrogenase Deficiency
- Medulloblastoma
- Medulloblastoma, Childhood
- Megalencephalic Leukoencephalopathy With Subcortical Cysts
- Meier-Gorlin Syndrome
- Meige Syndrome
- Melioidosis
- Melorheostosis
- Membranoproliferative Glomerulonephritis
- Membranous Nephropathy
- Mendelian Susceptibility to Mycobacterial Diseases
- Menetrier Disease
- Meningioma
- Meningocele
- Meningococcal Infection
- Meningococcemia
- Menkes Disease
- Meralgia Paresthetica
- Mercury Poisoning
- Merkel Cell Carcinoma
- Mesangial Proliferative Glomerulonephritis
- Metachromatic Leukodystrophy
- Metaplastic Carcinoma of the Breast
- Metastatic Squamous Neck Cancer With Occult Primary
- Methemoglobinemia, Beta-globin Type
- Methionine Adenosyltransferase Deficiency
- Methylmalonic Acidemia
- Methylmalonic Acidemia With Homocystinuria
- Methylmalonic Acidemia With Homocystinuria Type cblC
- Mevalonic Aciduria
- Microcephalic Osteodysplastic Primordial Dwarfism Type 1
- Microcephaly
- Microcystic Adnexal Carcinoma
- Microcystic Lymphatic Malformation
- Microencephaly
- Microphthalmia
- Microscopic Polyangiitis
- Microsporidiosis
- Micro Syndrome
- Microtia-Anotia
- Midline Lethal Granuloma
- Mild Phenylketonuria
- Miller-Fisher Syndrome
- Miller Syndrome
- Milroy Disease
- Minimal Change Disease
- Mirizzi Syndrome
- Misophonia
- Mitochondrial Complex I Deficiency
- Mitochondrial Complex II Deficiency
- Mitochondrial DNA-associated Leigh Syndrome
- Mitochondrial DNA Depletion Syndrome
- Mitochondrial Encephalomyopathy Lactic Acidosis and Stroke-like Episodes
- Mitochondrial Genetic Disorders
- Mitochondrial Neurogastrointestinal Encephalopathy Syndrome
- Mitochondrial Trifunctional Protein Deficiency
- Mitral Atresia
- Mixed Connective Tissue Disease
- Miyoshi Myopathy
- Moebius Syndrome
- Mollaret Meningitis
- Molybdenum Cofactor Deficiency
- Mondini Dysplasia
- Monkeypox
- Monoclonal Gammopathy of Undetermined Significance
- Monoclonal Mast Cell Activation Syndrome
- Monomelic Amyotrophy
- Morphea
- Morquio Syndrome B
- Morvan's Fibrillary Chorea
- Mounier-Kuhn Syndrome
- Moyamoya Disease
- Muckle-Wells Syndrome
- Mucoepidermoid Carcinoma
- Mucolipidosis III Alpha/beta
- Mucolipidosis Type 4
- Mucopolysaccharidosis
- Mucopolysaccharidosis Type I
- Mucopolysaccharidosis Type II
- Mucopolysaccharidosis Type III
- Mucopolysaccharidosis Type IIIA
- Mucopolysaccharidosis Type IIIB
- Mucopolysaccharidosis Type IV
- Mucopolysaccharidosis Type IVA
- Mucopolysaccharidosis Type VI
- Mucopolysaccharidosis Type VII
- Mucormycosis
- Mucous Membrane Pemphigoid
- Muenke Syndrome
- Muir-Torre Syndrome
- Mullerian Aplasia
- Multicentric Castleman Disease
- Multicentric Reticulohistiocytosis
- Multicore Disease
- Multicystic Renal Dysplasia, Bilateral
- Multifocal Choroiditis
- Multifocal Fibrosclerosis
- Multifocal Lymphangioendotheliomatosis With Thrombocytopenia
- Multifocal Motor Neuropathy
- Multiple Endocrine Neoplasia Type 1
- Multiple Endocrine Neoplasia Type 2
- Multiple Endocrine Neoplasia Type 2A
- Multiple Endocrine Neoplasia Type 2B
- Multiple Mitochondrial Dysfunctions Syndrome
- Multiple Myeloma
- Multiple Sulfatase Deficiency
- Multiple Symmetric Lipomatosis
- Multiple System Atrophy
- Muscle Eye Brain Disease
- Muscular Dystrophy
- Myasthenia Gravis
- Mycetoma
- Mycobacterium Abscessus
- Mycobacterium Avium Complex Infections
- Mycobacterium Xenopi
- Mycoplasmal Pneumonia
- Mycosis Fungoides
- Myelitis
- Myelodysplastic/myeloproliferative Disease
- Myelodysplastic Syndromes
- Myelodysplastic Syndrome With Excess Blasts
- Myeloid Leukemia
- Myeloid Sarcoma
- Myelomeningocele
- MYH9 Related Thrombocytopenia
- MYH-associated Polyposis
- Myhre Syndrome
- Myocarditis
- Myoclonus-dystonia
- Myoclonus Epilepsy
- Myoepithelial Carcinoma
- Myopathy Congenital
- Myosin Storage Myopathy
- Myotonia Congenita
- Myotonic Dystrophy
- Myotonic Dystrophy Type 1
- Myotonic Dystrophy Type 2
- Myxoid Liposarcoma
- Myxopapillary Ependymoma