How will you differentiate dwarfism by body ratio?

Based on upper and lower segment ratio dwarfism is classified as follows
Upper segment = Lower segment is seen in 

• Hereditary.
• Constitutional
• Pituitary dwarf.

Upper segment > Lower segment is seen in 

• Achondroplasia.
• Cretinism
• Juvenile myxoedema.

Upper segment < Lower segment is seen in 

• Spinal deformities

You should always remember that short stature may be associated with features of delayed puberty.