Abstract
Introduction
Some famous artistic representations rendered throughout the last few centuries can reveal a hidden or mysterious diagnosis of some diseases and these paintings have always drawn the attention of physicians interested in art. An artistic illustration of a child with a malformation or disability can reflect the characteristic appearance of a disease and its historic perspective. Some articles have revealed the definite diagnoses of a child, such as achondroplasia through portraits of dwarfs or some studies which have discussed the secret diagnosis of a crippled child diagnosed as having Pes Equinovarus or poliomyelitis.1–4
The investigation of a drawing depicting a disabled baby or child may encourage an orthopaedic surgeon to introduce an analytical approach using visual cues. 5 These paintings may also enhance observational skills of paediatric orthopaedic surgeons, give information about the historical process of a disease and demonstrate the impact of the disease at the time the painting was created. In this study, we aim to introduce some paintings that reveal musculoskeletal diseases related to paediatric orthopaedics.
Dwarfism and achondroplasia
Achondroplasia is the most common form of skeletal dysplasia, which is a type of rhizomelic dwarfism, and it occurs in one between 15 000 and 40 000 live births. 6 Patients are of short stature and have spinal anomalies, neurologic and craniofacial abnormalities and limb deformities. 7 Genu varum is a common deformity of the lower limb. 7 A mutation in the fibroblast growth factor receptor-3 gene on the short arm of chromosome 4 causes achondroplasia by affecting the maturation of chondrocytes in the growth plate. 6
Dwarfs have been described and portrayed in paintings throughout the ages, and most of these have been diagnosed as having achondroplasia, according to their characteristic appearance with short limbs, a big head, prominent forehead and low nasal bridge.
1
Spanish painter Diego Velasquez (1599 to 1660) included a number of dwarfs in his paintings.
3
In his oil-on-canvas painting titled

El Nino de Vallecas. By Velasquez, Diego Rodriguez De Silva Y (1599 to 1660). (Museo Nacional del Prado, Madrid, Spain).
In another oil-on-canvas painting by Velasquez,

Prince Baltasar Carlos with a Dwarf. By Velasquez, Diego Rodriguez De Silva Y (1599 to 1660). (The Museum of Fine Arts Boston, United States).
Sometimes, our point of view may lead us to a wrong diagnosis. As an example, in their study, Benedicenti and Superti-Furga reported the multiple faces of artwork diagnosis.
10
Poliomyelitis
Poliomyelitis (or polio), also called ‘infantile paralysis’, is a highly infectious and incurable viral disease. 11 Polio was first introduced as a disease of a separate clinical entity by an English physician named Dr. Michael Underwood in 1789, and the first effective vaccination was developed by Dr. John Salk in 1952. 12 Polio has not been eradicated completely despite successful worldwide eradication programmes, thus paediatric orthopaedic surgeons should be aware of the risk of resurgence of the disease. 11 It is possible that this endemic disease may have historic origins. Phillippe Hernigou previously reported on the possible diagnosis of poliomyelitis cases through medieval paintings. 13

Sad Inheritance. By Joaquín Sorolla y Bastida (1863 to 1923). (Private Collection).
One of José Gallegos y Arnosa's (1857 to 1917) earliest paintings is named

Crippled Boy. By José Gallegos y Arnosa (1857 to 1917). (Private Collection).
Beggars have commonly been painted by artists to show human charity. Some of them display no remarkable disability and let us think that they are imitating disability for their own benefit. The poor in these paintings provided an opportunity for the prudent and beneficent wealthy to display their charity. Sir William Beechey's (1753 to 1839) painting
Clubfoot
Archeological studies of ancient Egyptian tombs and mummies by Smith and Warren report the first know depictions of clubfoot. 15 Pes equinovarus or clubfoot, occurs in 0.3 to 7.8 per 1000 births and is one of the most common musculoskeletal abnormalities. 16 Clubfoot may be associated with myelodysplasia, arthrogryposis or multiple congenital anomalies. However, the majority of cases are idiopathic.
The most famous illustration of a child with clubfoot was painted by Spanish artist Jusepe de Ribera (1591 to 1652). In

The Clubfoot. By Jusepe de Ribera (1591 to 1652). (Louvre Museum, Paris, France).
Stahl et al
17
analyzed Ribera's painting and mentioned that hemiplegia and arthrogryposis are the most suitable diagnosis for this child. The authors reported that the boy holds a begging note enscribed
Conclusion
Artists painted children with bone malformations or consequences of diseases that affected the musculoskeletal system in the historical periods when paintings and drawings were the most common means of portraying humans and reflecting social life. Works of art can be used for educational purposes and the development of observational skills. Physicians can learn about the manifestations of the orthopaedic conditions depicted while discussing the painting and suggesting a diagnosis. Works of art may also reflect social environment, attitude and emotions towards sick disabled people or events. However, it is difficult for a physician to conclude on the exact diagnosis of the underlying medical condition shown in paintings of past centuries; the diseases depicted in these paintings hold their mystery. We appreciate all artists who had excellent observation skills and captured many signs of various diseases.
