_M_
_M_
M-komponent (Serum-Proteinelektroforese)
Magnesium
Magnesium i urin
Malariautstryk
MCH
MCHC
MCV
Metanol
Methemoglobin
Metotreksat (MTX)
Metylmalonsyre (MMA, metylmalonat)
Monocytter
Monoklonal komponent i urin
MSI (Mikrosatelitt instabilitet)