Macrocytic anemia
Macrocytosis
Macroglossia
Macrosomia
Macrostomia
Macrothrombocytosis
Macular edema
Maculopapular rash
Madelung deformity
Magnesium, increased
Malar hypoplasia
Mastalgia
Mean platelet volume, decreased
Mediastinal enlargement
Mediastinal shift
Mee's lines
Megacolon
Megaureter
Menorrhagia
Metabolic alkalosis
Metamorphopsia
Methemoglobinemia
Microangiopathic hemolytic anemia
Microcephaly
Microcytic anemia
Microcytosis
Microphthalmos
Miscarriage
Monocular diplopia
Monocytosis
Mood alteration
Muscle atrophy
Muscle cramps
Muscle fasciculations
Muscle weakness
Muscular hypertrophy
Muscular rigidity
Myalgia
Mydriasis
Myoclonus