Changes

*In horses

*In horses

*Often associated with [[Bones Developmental - Pathology#Angular limb deformity|angular limb deformity]]

*Often associated with [[Angular Limb Deformity|angular limb deformity]]

*Also called '''epiphysitis''' and '''physeal dysplasia'''  

*Also called '''epiphysitis''' and '''physeal dysplasia'''  

*Problem of [[Bone & Cartilage Development - Anatomy & Physiology|endochondral ossification]]

*Problem of [[Bone & Cartilage Development - Anatomy & Physiology|endochondral ossification]]

**Excessive activity

**Excessive activity

**Growth spurts

**Growth spurts

*Histologically: (appearance similar to [[Bones Developmental - Pathology#Angular limb deformity|angular limb deformity]])

*Histologically: (appearance similar to [[Angular Limb Deformity|angular limb deformity]])

**Lateral aspect of radius

**Lateral aspect of radius

***Thickened metaphyseal part of physeal cartilage

***Thickened metaphyseal part of physeal cartilage

***Tension

***Tension

***-> Transverse [[Bones Fractures - Pathology|fractures]] and repair

***-> Transverse [[Bones Fractures - Pathology|fractures]] and repair

**Laxity of periarticular attachements in young foals allows [[Bones Developmental - Pathology#Angular limb deformity|angular limb deformity]]; not occuring in older foals and young horses

**Laxity of periarticular attachements in young foals allows [[Angular Limb Deformity|angular limb deformity]]; not occuring in older foals and young horses

**(Sustained trauma produces similar lesions)

**(Sustained trauma produces similar lesions)