Three types of fracture of the base of the first metacapal bone (thumb) are distinguished by eponyms.

The Gehweiler classification divides fractures of the first cervical vertebra into five types. Type III is also refered to as Jefferson fracture. The classical Jefferson fracture is a four part fracture, where both the anterior and the posterior arch is fractured twice, but fractures with two or three fracture parts may also occur.

Letournel and Judet classification of acetabular fracture is a modification of the original 1964 Judet classification. It divides acetabular fractures into 5 simple patterns and 5 complex patterns. Complex fractures are more common and are composed of ≥2 simple fracture patterns.

Harris and Coupe classification was published in 2004. It is based on axial CT images of pelvis and has four basic types. Type II has four subtypes.

The Anderson and Montesano classification was published in 1988. It divides occipital condylar fractures into three types according to their morphology and mechanisms of injury.

Epiphyseal fractures are fractures that involve the epiphyseal growth plate in children and teenagers. Classificaton by Salter and Harris that was published in 1963 divides them into five types. It is a modification of previous classifications by Poland (1898) and Aitken (1936). Later, several other rare types of epiphyseal fractures were appended by other authors. Epiphyseal fractures may result in growth disturbances. A mnemonic "SALTR" can aid in memorizing the types for the purporses of examination.

Crowe et al. classified adult developmental dysplasia of the hip (DDH) into four grades according to the extent of underlying subluxation on AP x-ray of the pelvis.

The Pfirrmann classification was developed in 2001 and was based on previous systems. It was validated on 60 MRI examinations of the lumbar spine assessed by three independent observers. The imaging protocol included sagittal T1 weighted spin-echo, T2 weighted fast spin echo (FSE) in sagittal and axial plane.

In 2007, Watanabe et al. published grading of degenerative changes of the intervertebral disc by MRI. It is based on T2 weighted axial sections.

Brooker classification divides heterotopic ossifications that form following total hip replacement to four classes. It was published in 1973 by Brooker et al.