Parrot's sign
Parrot's Sign
Parrot's sign (pronunciation: /ˈpærəts saɪn/) is a medical term named after the French pediatrician, Jean Baptiste Octave Landry de Thézillat Parrot. It refers to a specific clinical sign in infants suffering from congenital syphilis, characterized by the presence of symmetrically distributed, painless swellings over the long bones.
Etymology
The term "Parrot's sign" is derived from the name of the French pediatrician, Jean Baptiste Octave Landry de Thézillat Parrot (1821–1883), who first described this clinical sign in the late 19th century. Parrot was a pioneer in the field of pediatrics and made significant contributions to the understanding of various childhood diseases, including congenital syphilis.
Clinical Presentation
Parrot's sign is characterized by the presence of symmetrically distributed, painless swellings over the long bones, particularly the femur and humerus. These swellings, also known as "Parrot's pseudoparalysis", are caused by periostitis, an inflammation of the periosteum, the layer of connective tissue that surrounds the bones. Infants with Parrot's sign may also present with other symptoms of congenital syphilis, such as snuffles, skin rash, and failure to thrive.
Related Terms
- Congenital syphilis: A severe, disabling, and often life-threatening infection seen in infants. A pregnant mother who has syphilis can spread the disease through the placenta to the unborn infant.
- Periostitis: Inflammation of the periosteum, a dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
- Snuffles: A term used to describe a condition where the baby has a runny nose. In the context of congenital syphilis, it refers to a profuse nasal discharge that is highly infectious.
- Jean Baptiste Octave Landry de Thézillat Parrot: A French pediatrician who made significant contributions to the field of pediatrics in the 19th century.
External links
- Medical encyclopedia article on Parrot's sign
- Wikipedia's article - Parrot's sign
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