In the young, a UBC is near the epiphyseal plate, migrating distally in time to abut or involve the diaphysis.
A UBC tends to have a conical shape, with a wider or "ice cream cone" base paralleling the epiphyseal plate.
Classically, ABC is a lytic, "blow-out," intramedullary bony lesion exhibiting explosive growth with eccentric expansion with its transverse diameter wider than the epiphyseal plate.
We also captured 52 individuals with cartilaginous epiphyseal plates in their finger joints.
Although cartilaginous epiphyseal plates were not visible in finger joints, its unworn teeth indicate that it was probably a young of the year (we compared tooth wear with teeth of a known volant young of L.
13) Most lesions are localized to the metaphyseal region; however, these lesions may involve the diaphysis and, in individuals with closed epiphyseal plates
, may also extend into the epiphysis.
A premature closure of the epiphyseal plates
before completion of the normal growth cycle will result in stunted growth - which is not reversible.
At the end of puberty the epiphyseal plates
close, terminating the ability of the bones to lengthen.