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URL of Article. William Alexander Newman Dorland. J Vasc Surg. Segmental hypoplasia of the great saphenous vein and varicose disease. Eur J Vasc Endovasc Surg. Ultrasonography study on the segmental aplasia of the great saphenous vein. There are differences between individuals in terms of the diameter of the GSV in normal limbs that are dependent on several different factors age, exercise of muscles, thickness of subcutaneous cellular tissues and diameters in diseased limbs also very, as has been demonstrated in microscopy studies.
Relationship between the diameter of great saphenous vein and body mass index. J Vasc Bras. A smaller than normal GSV diameter and a GSV that cannot be seen within the saphenous compartment are defined, respectively, as hypoplasia and aplasia and these conditions generally affect specific segments of the vein.
In such cases there is usually a vein outside of the compartment that courses in parallel and where the hypoplasia or aplasia returns to the compartment, connecting the segments of the saphenous vein. Ultrasonographic anatomy of the lower extremity superficial veins. Diagn Interv Radiol. Although aplasia or hypoplasia of the GSV is very common, there are few studies dealing with this anatomic abnormality. This article deals with the term aplasia as used to describe a segment of the GSV that cannot be seen within the saphenous compartment using color Doppler ultrasonography.
This was a prospective, cross-sectional study of a sample of 1, consecutive patients with complaints compatible with venous disease of the lower limbs. The age range of the sample was from 17 to 85 years, 1, of the patients were female and were male. They were examined using color Doppler ultrasonography over a 6-month period. Data collected when taking patient histories and during physical examinations were recorded on a specially designed form. This sample does not represent the general population, but a group of patients with symptomatic chronic venous disease CVD.
Patients were excluded if they had undergone a previous operation for varicose veins, had a history of deep venous thrombosis, were expectant mothers or if they had been classified as CEAP classes 5 or 6, the majority of whom have a prior history of varicose vein operations or deep venous thrombosis. On the basis of clinical assessment, the sample was subdivided into two groups, group A, comprising patients with varicose veins C 2 to C 4a,b , and group B, comprising patients free from varicose veins C 0 -C 1.
Make it easy: duplex examination of the venous system. This evaluation determined whether there was aplasia of the GSV by analyzing its path within the saphenous compartment. Limbs were then analyzed for the presence of varicose veins in other locations, irrespective of the source of reflux, i.
The criterion for definition of insufficiency was a reflux time longer than ms. Definition of venous reflux in lower-extremity veins. For cases that were significant, an analysis of residuals in a table was also performed. A total of 2, lower limbs were examined from a sample of 1, patients, with a predominance of females The classification of GSV aplasia described by Seidel et al. Proposal for classification of the great saphenous vein aplasia by the echo-color Doppler.
This classification includes six types, as follows: Type I - exhibiting aplasia only in the thigh segment; Type II - aplasia in the leg segment; Type III - aplasia in the distal segment of the thigh and proximal segment of the leg; Type IV - vein in the saphenous compartment in the thigh and aplasia of the whole segment in the leg; Type V - vein in the saphenous compartment only in a short proximal segment in the thigh, outside of the compartment distally; and Type VI - vein with a short segment in the saphenous compartment only in the distal leg Figures 1 , 2 3.
The types of aplasia found in the total sample of 2, limbs are detailed in Table 2. This conclusion is confirmed by the analysis of residuals in the table. The results show that in group A there was a larger number of limbs with both GSV insufficiency and GSV aplasia than in group B and, furthermore, that among the overall number of limbs with aplasia in both groups, there was a predominance of reflux in the proximal segment within the saphenous compartment and the epifascial branch Table 3 , Figure 4.
In summary, the totals for each segment with reflux enabled testing of the homogeneity between groups A and B using binomial tests. A doctor can diagnose dysplasia in a developing fetus before birth, and it can cause developmental problems as the child grows. In adults, dysplasia typically refers to the abnormal growth of tissues or cells. These cells can be precancerous and create tumors if they continue to grow. Sometimes, medical professionals may use the same term to describe aplasia or dysplasia that affects a specific area of the body.
For example, they may refer to both radial aplasia and radial dysplasia as radial club hand. They might sometimes also use this term to refer to hypoplasia of the radius. Doctors classify radial club hand into four different types , depending on the specific cause.
This categorization can lead to confusion as to whether it is appropriate to use the terms aplasia and dysplasia interchangeably. However, people should not see the two terms as equivalent. Although they may produce similar effects in the same area of the body and cause conditions with a shared name, aplasia and dysplasia are different. Many types of aplasia will be obvious at birth, but some may not become apparent until later in life.
Learn about DiGeorge syndrome, a disorder of the chromosomes in which one important chromosome is deleted. This causes a range of systems in the body…. Birth defects, now known as congenital anomalies, are conditions that a person has from birth. Examples include cleft lip, Down syndrome, and spina….
A range of factors can determine how tall a child will be, including the height of their biological parents, nutrition, and general health. Learn more. What to know about aplasia. Medically reviewed by Alana Biggers, M. Types Similar conditions Vs. Types of aplasia. Agenesis, hypoplasia, and atrophy.
Difference between aplasia and dysplasia. Latest news Exposure to air pollutants may amplify risk for depression in healthy individuals. Costs associated with obesity may account for 3. Medical Myths: All about lung cancer. Related Coverage. What's to know about DiGeorge syndrome? A guide to height for parents and children.
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