What causes flask deformity?
This deformity results from defective bone modeling (under-modeling) at the meta-diaphyseal [di-metaphyseal] region leading to straight uncurved [or even laterally bowed] di-metaphyseal borders and cortical thinning giving the appearance of EFD [Castriota-Scanderbeg and Dallapiccola, 2005].
What is Erlenmeyer flask deformity?
Erlenmeyer flask bone deformity (EFD) is a long-standing term used to describe a specific abnormality of the distal femora. The deformity consists of lack of modeling of the di-metaphysis with abnormal cortical thinning and lack of the concave di-metaphyseal curve resulting in an Erlenmeyer flask-like appearance.
What is metaphyseal flaring?
Erlenmeyer flask deformity (EFD), also known as metaphyseal flaring, refers to a radiographic appearance typically on a femoral radiograph demonstrating relatively reduced constriction of the diaphysis and flaring of the metaphysis as a result of undertubulation.
What is an Erlenmeyer flask used for?
MixingErlenmeyer flask / Uses
What is Pyle disease?
Pyle disease is a disorder of the bones. Its hallmark feature is an abnormality of the long bones in the arms and legs in which the ends (metaphyses) of the bones are abnormally broad; the shape of the bones resembles a boat oar or paddle.
What is a Erlenmeyer flask used for?
What does metaphysis mean?
The metaphysis is the region where the epiphysis joins the diaphysis; in a growing bone this corresponds to the calcified layer of the epiphyseal plate together with the interdigitating bone (see Figure 4.19). The interface between the hypertrophic and calcified layers is sometimes referred to as the tidemark.
What is a banana fracture?
A banana fracture refers to a complete, horizontally orientated pathological fracture seen in deformed bones affected by Paget disease. This term is often used to describe incremental fractures that occur in Paget disease as well, which represent a type of insufficiency fracture.
What are characteristics of an Erlenmeyer flask?
An Erlenmeyer flask, also known as a conical flask (British English) or a titration flask, is a type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck. It is named after the German chemist Emil Erlenmeyer (1825–1909), who created it in 1860.
What is the advantage of a flask over a beaker?
Flasks are normally the site of chemical reactions, for the reaction can take place in the large vessel and have low risk of spilling due to the long, narrow neck of the flask. Furthermore, flasks have the ability to be capped or corked, therefore solutions can be held for long periods of time without risk of spilling.
What is Craniometaphyseal dysplasia?
Craniometaphyseal dysplasia (CMD) is a rare disorder that involves the way the bones in the head, arms, and legs grow. The skull is made up of about 20 bones that grow and get larger as people grow. For persons with CMD, the bones of the skull grow too much and push into each other.
When does the Erlenmeyer flask shape describe the distal femur?
The Erlenmeyer flask shape describes the distal femur when the metaphysis is broad and the transition zone of the diaphysis is wide ( Fig. 5.67 ). The Erlenmeyer flask shape is always the result of a pathologic process: either failure of remodeling (bone dysplasia) or expansion of the marrow space (infiltrative processes).
When do distal femur fractures of the knee occur?
Fractures of the thighbone that occur just above the knee joint are called distal femur fractures. Distal femur fractures most often occur either in older people whose bones are weak, or in younger people who have high energy injuries, such as from a car crash.
What’s the difference between a closed and open femur fracture?
(Right) A comminuted fracture that extends into the knee joint and upwards into the femoral shaft. Distal femur fractures can be closed — meaning the skin is intact — or can be open. An open fracture is when a bone breaks in such a way that bone fragments stick out through the skin or a wound penetrates down to the broken bone.
What causes a femur fracture in a younger person?
Cause Fractures of the distal femur most commonly occur in two patient types: younger people (under age 50) and the elderly. Distal femur fractures in younger patients are usually caused by high energy injuries, such as falls from significant heights or motor vehicle collisions.