M-c - Mei Mel - Min Mit - Mta Muc - Myo
M-CMTC syndrome
Macrocephaly - Cutis Marmorata Telangiectasia Congenita syndrome see M-CMTC syndrome
Macrocephaly, Multiple Lipomas and Haemangioma see Bannayan-Riley-Ruvalcaba syndrome
Macular degeneration see Macular disease
Macular disease
Macular Dystrophy see Macular disease
MAD see Fatty Acid Oxidation Disorders
Majewski Osteodysplastic Primordial Dwarfism Type II
Male balding see Alopecia
Male pattern hair loss see Alopecia
Male Pseudo-Hermaphroditism see Androgen Insensitivity syndrome
Malignant Atrophic Papulosis see Degos disease
Malignant Histiocytosis see Histiocytosis
Malignant Hyperpyrexia see Malignant Hyperthermia
Malignant Hyperthermia
Mandibulo Dysostosis see Treacher Collins syndrome
Manic depression see Bipolar disorder
Mannosidosis see Mucopolysaccharide diseases and associated diseases
Maple Syrup Urine disease see Organic Acidaemias
Marfan syndrome
Marinesco-Garland Syndrome see Marinesco-Sjögren Syndrome
Marinesco-Sjögren Syndrome
Marinesco-Sjögren-Garland Syndrome see Marinesco-Sjögren Syndrome
Maroteaux Lamy see Mucopolysaccharide diseases and associated diseases
Mastocytosis
Ménière's disease
Möbius syndrome see Moebius syndrome
MCAD see Fatty Acid Oxidation Disorders
McArdle disease see Glycogen Storage diseases
McCune-Albright syndrome
McLeod Neuroacanthocytosis syndrome see Neuroacanthocytosis disorders
McLeod syndrome see Neuroacanthocytosis disorders
MDA see Purine & Pyrimidine Metabolic diseases
MDC1A see Congenital Muscular Dystrophy
MDC1C see Congenital Muscular Dystrophy
ME see Chronic Fatigue syndrome / Myalgic Encephalopathy
MEB see Congenital Muscular Dystrophy
MED see Perthes disease
Mediterranean Anaemia see Thalassaemia Major (ß Thalassaemia)
Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency see Fatty Acid Oxidation Disorders
Medulloblastomas see Brain Tumours
Meige syndrome see Brain Tumours