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Machado-Joseph Disease
Macroglossia
Madelung’s Disease
Maffucci Syndrome
Mal de Debarquement
Malaria
Malignant Hyperthermia
Mallory Weiss Syndrome
Mandibuloacral Dysplasia
Mantle Cell Lymphoma
Maple Syrup Urine Disease
Marcus Gunn Phenomenon
Marden Walker Syndrome
Marfan Syndrome
Marinesco-Sjögren Syndrome
Maroteaux Lamy Syndrome
Marshall Smith Syndrome
Marshall Syndrome
Mastocytosis
Maternally Inherited Leigh Syndrome and NARP Syndrome
Maxillofacial Dysostosis
May Hegglin Anomaly
Mayer-Rokitansky-Küster-Hauser Syndrome
McCune Albright Syndrome
McKusick Type Metaphyseal Chondrodysplasia
MCT8-Specific Thyroid Hormone Cell Transporter Deficiency
MDR3 Deficiency
Measles
Meckel Syndrome
MECP2 Duplication Syndrome
Median Arcuate Ligament Syndrome
Medium Chain Acyl CoA Dehydrogenase Deficiency
Medullary Sponge Kidney
Medulloblastoma
Megalencephaly-Capillary Malformation
Megalocornea Intellectual Disability Syndrome
Meige Syndrome
Melanoma, Malignant
MELAS Syndrome
Meleda Disease
Melkersson Rosenthal Syndrome
Melnick Needles Syndrome
Melorheostosis
Menetrier Disease
Ménière’s Disease
Meningitis
Meningitis, Bacterial
Meningitis, Tuberculous
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Meningococcemia
Menkes Disease
Merkel Cell Carcinoma
MERRF Syndrome
Mesenchymal Chondrosarcoma
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Mesothelioma
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Metaphyseal Chondrodysplasia, Schmid Type
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Mevalonate Kinase Deficiency
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Mikulicz Syndrome
Miller Syndrome
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Mixed Connective Tissue Disease (MCTD)
Mixed Cryoglobulinemia
Moebius Syndrome
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Mosaic Trisomy 22
Mosaic Trisomy 9
Mowat-Wilson Syndrome
Moyamoya Disease
Mucha Habermann Disease
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