Malnutrition remains prevalent in many developing countries, where diabetes
mellitus is another common condition. Historically, extraordinarily advanc
ed forms of diabetes mellitus were described in tropical countries (diabete
s type J, type K...). However, these forms account for only a tiny minority
of cases of diabetes mellitus in countries where malnutrition is common. N
oninsulin-dependent diabetes without obesity contributes as many as 20% of
all cases of diabetes in these countries. Although malnutrition probably in
fluences the expression of diabetes mellitus, whether a causal link exists
between the two conditions remains unclear. The role of maternal malnutriti
on in the occurrence of diabetes mellitus is an important issue.