Lymphopenia

Definition: This means you don't have enough lymphocytes, which are a subset of white blood cells. The word is a combination of lymphocyte, which is a type of infection-fighting white blood cell, and penia, a word ending that means "deficiency."

Lymphocytes are a subset of white blood cells that are one of three main types of blood cells. The overwhelming majority of these cells are the red blood cells (erythrocyte), which bind to oxygen. The second most common, but still relatively few compared to the erythrocytes are the thrombocytes (platelets) that clot the blood. The least common types are the white blood cells (leukocytes), which are essential to the body's immune system. These cells form in the bone marrow and then enter the blood circulation or travel to other parts of the body. Wherever they are, they work to attack or identify parasites, viruses or harmful bacteria.

Reduced production of blood cells can be caused by many conditions, but it's also a common side effect from medication. For example, treatment for chronic viral hepatitis, with peginterferon and ribavirin, sometimes causes suppression of the white blood cells (leukopenia) and sometimes specifically neutropenia (low neutrophils) or lymphopenia.

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Leukemia

The leukemia or leukosis is a whole group of tumors which is characterized uncontrolled proliferation and a different degree of a differentiation hematogenic cells. Leukemic cells thus are descendants, clones of one of mutate cells.

The reason of a leukemia, as a rule, are chromosomal aberrations, i.e. variations in structure of chromosomes as a result of various processes of restructuring of their structure: trans location, deletion, inversions, fragmentation.

According to traditional classification, all leukemia share on sharp and chronic. Such division is connected with various capacity of the given tumors to a differentiation proliferating cells. In case of sharp leukosis the differentiation practically is absent, in blood the huge quantity unripe, nonfunctional blast cells that leads to oppression normal hematosis all fragments collects. The specified signs come to light in blood more than in 80 % of cases. Chronic leukosis (leukemia) gives a population of the differentiated cells, is usual granulocytic, one step at a time replacing normal cells of peripheral blood.

Sharp leukemia can be divided on lymphoblastic and myeloblastosis.

* Sharp lymphoblastic leukosis develops from predecessors B-achroacyte (about 75 % cases) more often.
* Sharp myeloblastosis leukosis (the sharp myeloid leukemia) often refers to «nonlymphoid leukemia» to emphasize its variety and difference from Sharp lymphoblastic leukosis since blasts thus can have a granulocytic origin. Sharp 'nonlymphoid leukosis' histological is classified by the letter of M with figures from 0 up to 7, for example, М7 is a sharp megacaryoblast leukemia.

The diagnosis of a leukemia is put on set of researches of blood, and a bone brain. At diagnostics the clinical picture, and cytogenetics, morphology and immunology revealed blasts has not crucial importance. On parameters revealed at it will depend not only statement of the final diagnosis, but also the forecast, treatment and an outcome of disease.

The forecast at leukemia in whole is more favorable at children's age (1-9 years), as well as depends on a type of a pathology, a type of cells and terms of revealing of disease.

The basis of treatment leukosis is made with chemotherapy. Treatment today legal that is why each type of a pathology and its separate features matter for a choice of the report of treatment. At sharp leukosis treatment is based on poly chemotherapy. Its efficiency above at sharp lympholeukosis reaches 95 %. At sharp myeloleukemia efficiency of chemotherapy exceeds 80 %, but reasonably is often accompanied by complications, and 5-years remission is observed only at 40 % of patients, while relapses at Sharp lymphoblastic leukosis – more a unusual occurrence.

As a whole therapy of leukosis should be spent in specialized branch, with an opportunity of application of the most modern and effective treatment that guarantees both a high probability of full remission, and full of recover after all complex of medical actions.

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Cerebral haemorrhage

The haemorrhage insult results from spontaneous break of an intrabrain vessel and is accompanied by formation of a hematoma. Intrabrain haemorrhages are one of the heaviest forms of vascular defeat of a brain, lethality at which reaches 60—80 %. More often haemorrhages in a brain are observed on a background of hypertonic illness (50—60 %), at pathological changes in vessels of a brain which reason most often is the atherosclerosis. In occurrence of a haemorrhage in a brain great value give to aneurysms of brain vessels (arterial, arteriovenous and, the main thing, miliary).
In some cases to reveal the reason haemorrhage an insult it is not obviously possible. As often direct push to development of a haemorrhage the various physiological or pathological factors defining time increase of arterial pressure serve: the physical and intellectual pressure, convulsive attacks, childbearing, emotional stresses, fluctuations of a body temperature, an alcoholic intoxication, etc. The spontaneous haemorrhage in a brain prevails at women.

In most cases haemorrhages are localized close basal kernels and an internal capsule that speaks earlier development of atherosclerotic changes in vessels of the given area. In a clinical practice it is accepted to distinguish lateralis and medial haemorrhages, border is the internal capsule. Lateralis cerebral haemorrhages settle down on the outside from an internal capsule, is closer to a bark of the big brain, medial — on the inside from a capsule. The third variant is the arrangement of haemorrhages simultaneously on both parties of an internal capsule. Medial haemorrhages are quite often accompanied by break of a hematoma in a cavity lateral or III ventricle.

The haemorrhage insult develops mainly sharply, quite often without any harbingers. The clinic is characterized by sudden loss of consciousness and nidal neurologic symptoms. Sometimes in the beginning it is observed one time or repeated vomiting. The person of the patient becomes purple-red, pulse strained, slow, breath noisy, bubbling, the body temperature soon raises. A head and eyes are often turned aside. From nidal symptoms first of all there are impellent infringements in the form of paresis and paralyses of finitenesses on the party opposite to the center of a haemorrhage, resulting a prelum hematoma of fibres of an internal capsule or vessels feeding it. At rather small haemorrhages impellent infringements are poorly expressed, whereas the massive haemorrhages causing prelum an internal capsules, lead to a rough impellent pathology — hemiplegia.

Revealing of some others nidal symptoms at intrabrain haemorrhages, in particular infringements of sensitivity, hemianopsia, speech disturbance, becomes possible after an output of the patient from a coma and restoration of consciousness. During short time from the moment of occurrence of an insult significant fluctuations of symptoms of infringement of vegetative functions are observed: pallor of the person is replaced hyperemia or, to the contrary, hyperemia — pallor, from time to time the person becomes cyanotic, becomes covered then, distal departments of finitenesses cold, cyanochroic, all is frequent these variations prevail on a side of a paralysis.

Right at the beginning of an insult the most typical happens increase of a muscular tone, more often in finitenesses to the broken impellent function. In some cases there is a proof increase of a muscular tone in the form of seizure — hormetonic, usually bilateral, with capture not only muscles of finitenesses, but also a trunk and a neck. Occurrence of hormetonic — the extremely adverse also specifies a symptom dissociation between a trunk and a spinal cord, on the one hand, and a bark of the big brain — with another. Hormetonic syndrome is more often observed at break of blood in ventricula system. Change of the raised muscular tone by a hypotonia and atony is usually observed in a terminal phase of disease on a background of the general fading of reflex activity.

In diagnostics measurement of pressure of a spinal liquid, research of its structure, as well as such methods, as electroencephalography, echoencephalography, angiography and especially computer tomography have great value. If at persons young and middle age pressure of a spinal liquid happens raised at elderly and especially senile age it can be normal and even lowered is more often. Availability of blood in a liquid — frequent and one of the most authentic signs of hemorrhagic insult. In a liquid are quite often marked the raised content of the fiber, moderated pleocytosis.

Research of bioelectric activity of a brain at a haemorrhage in hemispheres of the big brain enables to define the party of defeat and often share localization. The center of pathological activity is usually shown by presence polymorphic, more high-amplitude fluctuations of potentials or sharp decrease in amplitude of fluctuations in the field of defeat.

Echoencephalography at intrabrain haemorrhages with formation of hematomas in hemispheres of the big brain finds out displacement of a signal of M-echo in the opposite party from the center. The important role in diagnostics belongs angiography. At formation of an intrabrain hematoma on angiogram underpressure of vascular figure, displacement of brain vessels with formation a nonvascular zone corresponding localization of process are defined. By means of angiography in some cases it is possible to define not only localization of an intrabrain haemorrhage, but also the reason of its occurrence. The most informative in an establishment of localization and sizes of a hematoma is the computer tomography (the hematoma is defined in the form of the center of the raised density).

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Synchronized Sound and Motion Offer New Insight Into Autism

Toddlers with autism spectrum disorders (ASDs) are frequently preoccupied with synchronized sound and motion, such as the precise matching of audiovisual presentation that occurs during the act of speaking. Children with ASDs tend to focus on a person’s mouth when they are speaking, whereas children unaffected by ASDs focus on socially meaningful movements of the human body, such as gestures and facial expressions.

Autism spectrum disorders (ASDs) affect social interaction and communication, which can cause delays or difficulties in developing fundamental skills from infancy to adulthood. Autism is the most common form of ASD with an estimated three to six children out of each group of 1,000 being diagnosed with the condition. In addition, males have a four times greater likelihood of being autistic than females. Unusual, repetitive, or severely limited activities and interests, in addition to having impaired social interaction and difficulties with verbal and nonverbal communication, characterize autism. Other ASDs include Asperger syndrome, Rett syndrome, childhood disintegrative disorder, and pervasive developmental disorder not otherwise specified.

According to Ami Klin, Ph.D., and colleagues at Yale University School of Medicine, the surprising discovery that children with ASDs are attracted to the synchronization of sound and motion may lead to earlier diagnosis of autism as well as a better understanding of the origin and development of the condition. The report can be found in the online journal Nature.

In a statement, Dr. Klin said, “Typically developing children pay special attention to human movement from very early in life, within days of being born.” However, children with autism don’t follow human movement, which causes them to miss social information that is communicated through motion, which is “likely to adversely affect the course of their development.”

The Yale team studied reactions of a group of toddlers that included 21 who had ASDs, 16 who were developmentally delayed but non-autistic, and 39 who were typically developing children. Using a technique known as motion capture, in which a video figure wears lights on parts of its body that capture the path of the figure’s movement, the researchers observed the children’s focus of attention on light patterns in conjunction to the figure’s voice. The image was played normally on one side of the screen while it was played upside-down and in reverse on the opposite side of the screen. A total of four light patterns were played to the children. The results showed that those with autism spent approximately 50 percent of their time watching both the upright figure and the inverted one while the other two groups of children spent about 60 percent of their time watching the upright figure.

When a fifth pattern was played, depicting the figure playing the common childhood game of pat-a-cake that included the sound of a clap as the hands of the figure came together, the autistic children showed a significant preference for it by watching it almost 66 percent of the time. The synchronous sound and motion only occurred on the upright side of the screen since the motion was both backward and upside-down on the opposite side. The reaction to this new pattern by the two control groups was unchanged at around 60 percent.

In a second analysis, the researchers introduced two new patterns to 10 children with autism that confirmed their theory that toddlers with autism would prefer the patterns having synchronous motion and sound. Regarding the results of the studies, co-author Warren Jones, Ph.D. stated, “Audio-visual synchronies accounted for about 90 percent of the preferred viewing patterns of toddlers with ASD and none of unaffected toddlers.” He then added, “Typically-developing children focused instead on the most socially relevant information.”

The researchers concluded that the results developmentally “mark an important, early point along an alternative path of neural and behavioral specialization.” The finding could lead to educational practices that may help young autistic children to build social referencing skills.

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Burkitt Lymphoma

Burkitt’s lymphoma (or Burkitt Lymphoma) is an uncommon type of Non-Hodgkin Lymphoma (NHL). Burkitt’s lymphoma commonly affects children. It is a highly aggressive type of B-cell lymphoma that often starts and involves body parts other than lymph nodes. In spite of its fast-growing nature, Burkitt’s lymphoma is often curable with modern intensive therapies.

Two types of Burkitt's lymphoma:

There are two broad types of Burkitt’s lymphoma – the sporadic and the endemic varieties. There is a very high incidence of this disease in equatorial Africa, and disease in this region is called endemic Burkitt’s lymphoma. Disease in other regions of the world is much less common, and is called sporadic Burkitt’s lymphoma. Though they are the same disease, the two forms are different in many ways.

Endemic Burkitt’s lymphoma:

In equatorial Africa, about half of all childhood cancers are Burkitt’s lymphoma. The disease involves children much more than adults, and is related to Epstein Barr Virus (EBV) infection in 95% cases. It characteristically has a high chance of involving the jawbone, a rather distinctive feature that is rare in sporadic Burkitt’s. It also commonly involves the abdomen.

Sporadic Burkitt’s lymphoma :

The type of Burkitt’s lymphoma that affects the rest of the world, including Europe and the Americas is the sporadic type. Here too, it's mainly a disease in children. The link between Epstein Barr Virus (EBV) is not as strong as with the endemic variety, though direct evidence of EBV infection is present in one out of five patients. More than the involvement of lymph nodes, it is the abdomen that is notably affected in more than 90% of the children. Bone marrow involvement is more common than in the sporadic variety. Jaw involvement is extremely rare.

Treatment of Burkitt’s lymphoma:

Burkitt lymphoma is a highly aggressive tumor, and often life threatening. But it is also one of the more curable forms of lymphoma. With current aggressive forms of chemotherapy that uses drugs in high doses, and with the availability of new measures to support individuals during intensive treatment, this lymphoma is curable in many patients. Nearly 80% of those with localized disease and more than half the children with more widespread disease are cured. Late relapses are hardly seen.

See Also

The types of Non-Hodgkin Lymphoma (NHL)

Tests for Lymphoma

How does Chemotherapy work?

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Anemia

Anemia is a condition at which in blood the content of functionally adequate red cells (erythrocytes) is lowered. The anemia develops owing to the varied reasons, accompanies set of diseases and frequently is only their symptom. Quantitatively it is expressed by a degree of reduction of concentration of hemoglobin – a ferriferous pigment erythrocyte, giving to blood red color. At diagnostics of an anemia it is necessary to consider normal fluctuations of concentration of hemoglobin depending on a sex and age.

The anemia arises in all the periods of human life not only at various diseases. Progress of an anemia can be connected with the climacteric period, hormonal infringements, character of a feed, diseases of a digestive path, a liver, kidneys, infringement resorption, autoimmune conditions, operative intervention and other factors. Quite often the anemia is an independent or accompanying symptom of many internal diseases, infectious and oncological illnesses.

Hematolytic anemia. Erythrocatalysis occurs under influence of antibodies. It can be the antibodies of mother directed against erythrocytes of the child at incompatibility of the child and mother on a Rhesus factor-antigene and much less often on antigenes of system AVO. Antibodies against own erythrocytes can be active at usual temperature or only at cooling. They can appear for no apparent reason or in connection with fixing on erythrocytes incomplete antigenes-hapten alien for an organism.

Aplastic anemia. Disease described by pancytopenia circumferential blood and reduction of a content of cells of a bone brain. It is connected basically with a cytopenia syndrome and depends on its depth.

Treatment of anemia

Therapy depends factors which have by nature caused an anemia. The best results are observed at introduction of separate missing substances, for example iron at iron-deficient anemias, vitamin B12 at pernicious anemias and a folic acid at aphthous cachexia (the disease, described by infringement of processes resorption in intestines and accompanied an refractory megaloblastic anemia).

The anemia caused by decrease of production erythrocytes and arising at such chronic diseases as a cancer, infections, an arthritis, to illness of kidneys and hypothyroidism, it is frequently poorly expressed and does not demand special treatment. Treatment of the basic disease should affect salutarily and an anemia. In some cases happens the cancelling of the preparations overwhelming hematosis, – antibiotics or other chemotherapeutic means is necessary.

Blood transfusions, as a rule, are shown only in the urgent cases requiring restoration of volume of circulating blood and quantity of hemoglobin, as well as at aggravations of a chronic anemia for the lack of other medical means. At heavy forms hematolytic illnesses of newborns for prevention of the jaundice, capable to lead to defeat of a brain (bilirubinic encephalopathies), apply exchange transfusion (replacement of blood of the child by the blood which is not containing the factor of destruction of erythrocytes). Blood transfusions are interfaced to a number of severe hazards, such, as sharp the hematolytic reactions of incompatibility leading nephritic insufficiency, virus infection of a liver (hepatites) and illness of adjournment of iron (bronzed diabetes).

At the some people with hematolytic conditions surgical removal of a spleen is needed; it is especially effective at congenital annulocyte anemias as leads to disappearance of all clinical symptoms though does not influence hereditary infringement of structure erythrocytes.

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Aphasia and Apraxia

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