[jinx]

Huh. This is interesting.

two patterns of obesity emerge with respect to the cellular character of the adipose tissue mass of these patients: hyperplastic, with increased adipose cell number and normal or increased size, and hypertrophic, with increased cell size alone.

When these different cellular patterns are examined in terms of various aspects of body size, body composition, and the degree, duration, and age of onset of obesity, only the latter uniquely distinguishes the hyperplastic from the hypertrophic: hyperplastic obesity is characterized by an early age of onset, hypertrophic, by a late age of onset. These studies indicate that there are two distinct periods early in life during which hypercellularity of the adipose tissue are most likely to occur: very early within the first few years, and again from age 9 to 13 yr.