What are lead lines in xray?
These lines, which are actually growth arrest lines, are not pathognomonic for lead poisoning (see the images below). Lead poisoning. Pica. Plain abdominal radiograph in a 3-year-old patient shows multiple metallic particles due to ingested flakes of lead paint.
What is diaphysis and metaphysis?
The long bone in a child is divided into four regions: the diaphysis (shaft or primary ossification centre), metaphysis (where the bone flares), physis (or growth plate) and the epiphysis (secondary ossification centre). In the adult, only the metaphysis and diaphysis are present (Figure 1).
What are metaphyseal bands?
Dense metaphyseal bands, less commonly known as dense metaphyseal lines, transverse bands, or “lead lines,” indicate radiopaque bone (thicker than the adjacent diaphyseal cortex) at the metaphysis of growing bone, particularly at the wrists and knees (,Figs 1, ,2).
What is metaphyseal sclerosis?
Metaphyseal chondrodysplasia, Schmid type Schmid metaphyseal chondrodysplasia (SMCD) is characterized by progressive short stature that develops by age two years. The clinical and radiographic features are usually not present at birth, but manifest in early childhood with short limbs, genu varum, and waddling gait.
What is lead line?
a line by which a lead is lowered into the water to take soundings: in deep-sea practice, divided into levels one fathom apart, variously treated as marks and deeps.
Is metaphysis part of diaphysis?
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).
What is metaphyseal lucency?
Bilateral metaphyseal lucency was defined as the metaphyseal lucent area in both lower extremities (Fig. 1C). An epiphyseal cortical irregularity was defined as a fragmented appearance at the medial side of the epiphysis in the distal femur (Fig. 2).
What is metaphyseal dysplasia?
Metaphyseal dysplasia, or Pyle disease, is a disorder of the bones. It is a rare disease in which the outer part of the shafts of long bones is thinner than normal and there is an increased chance of fractures.
What is Pycnodysostosis?
Pycnodysostosis is a rare genetic disorder characterized by distinctive facial features and skeletal malformations. Affected individuals may have osteosclerosis, a condition characterized by abnormal hardening and increased density of bone.
What is lead line in a horse show?
Leadline – Leadline is a horse show class for very young children, generally under the age of 7 years.
How long is a lead line?
The most common lengths for groundwork training are 12′ or 14′. The “standard” long line is 22′. I usually have those lengths available at fairs or events. 8 – 9′ is a good length for a rope that will be used mainly for leading/tying.
What is lead lining?
Lead lining is the process of applying lead to sheet metal, plastics or castings. Vulcan GMS uses a variety of contact cements and epoxies based on the application. Lead can be saw cut, router cut or die cut to produce the lead blank needed for the application.
Is lead apron necessary?
Again, although a lead apron is unnecessary for properly performed dental x-ray imaging, a thyroid-protective collar is recommended. An extraoral bitewing x-ray series is likely to be lower in dose than a full view panoramic.
What is a lucent line?
The “Lucent Line Sign” occurs because the prosthesis has rotated within the cement mantle of the fractured proximal femur, creating a gap at the stem-cement interface. For this separation to occur and the gap to appear, a fracture must have occurred. The presence of a lucent line is thus pathognomonic of a fracture.
What is metaphyseal cupping?
Metaphyseal cupping refers to an inward bulging of the metaphyseal profile giving the metaphysis a cup-like appearance. [ from HPO]
What causes metaphyseal Chondrodysplasia?
Causes. MCDS is caused by a mutation of the gene for type X collagen called COL10A1. This gene has been mapped to chromosome 6q21-22.3. MCDS is transmitted as an autosomal dominant trait.