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| This glossary contains: 19186 medical terms |
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Dissection
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DissectionThe process of cutting apart or separating tissue as, for example, in the study of anatomy or in the course of a surgical procedure.
RELATED TERMS--------------------------------------
Tissue
Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.
Anatomy
The study of form. Gross anatomy involves structures that can be seen with the naked eye. It is as opposed to microscopic anatomy (or histology) which involves structures seen under the microscope.
SIMILAR TERMS--------------------------------------
Dissect
To cut apart or separate tissue as, for example, for anatomical study or in surgery. Also, an artery is said to dissect when its wall is torn, as in a dissecting aneurysm.
Dissection, axillary
Surgery in which the axilla (the armpit) is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment.
Dissection, neck
Surgery in which the neck is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment. A radical neck dissection involves removal of a tumor from the neck with an additional margin of apparently normal tissue of at least 2 cm, as well as removal of the lymph nodes from the neck.
Dissociate
To separate or sunder that which is developing as a unity, or has become one, so that it becomes two or more unrelated or partially related entities. In mental life and its expression, these entities are experienced phenomenologically as trance states, alternative states of consciousness, fugue states, or multiple personalities.
Dissociation
disruption in the usually integrated functions of consciousness, memory, identity, or perception of the environment. The disturbance may be sudden or gradual, transient or chronic.
PREVIOUS AND NEXT TERMS--------------------------------------
Disordered thinking
A failure to be able to "think straight." Thoughts may come and go rapidly. The person may not be able to concentrate on one thought for very long and may be easily distracted, unable to focus attention. The person may be unable to connect thoughts into logical sequences, with thoughts becoming disorganized and fragmented. This lack of logical continuity of thought, termed a "thought disorder," can make conversation very difficult and may contribute to social isolation. If people cannot make sense of what an individual is saying, they are likely to become uncomfortable and tend to leave that person alone. Disorder thinking is a characteristic feature of schizophrenia.
Disorders, lymphoproliferative
Malignant diseases of the lymphoid cells and cells from the reticuloendothelial system (which take up and sequester inert particles). The lymphoproliferative disorders are in contrast to the myeloproliferative disorders which are malignancies of certain bone marrow cells including those that give rise to the red blood cells, the granulocytes (types of white blood cells), and the platelets (crucial to blood clotting).
Disorders, myeloproliferative
Malignant diseases of certain bone marrow cells including those that give rise to the red blood cells, the granulocytes (types of white blood cells), and the platelets (crucial to blood clotting). The myeloproliferative disorders include myelophthisic anemia, erythroblastic leukemia, leukemoid reaction, myelofibrosis, myeloid metaplasia, polycythemia vera, and thrombocytosis. The myeloproliferative disorders are in contrast to the lymphoproliferative disorders which are malignancies of lymphoid cells and cells of the reticuloendothelial system (such as macrophages) which can take up inert particles and sequester them.
Disruption sequence
The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the rubella (German measles) virus.
Dissect
To cut apart or separate tissue as, for example, for anatomical study or in surgery. Also, an artery is said to dissect when its wall is torn, as in a dissecting aneurysm.
Dissection
Dissection, axillary
Surgery in which the axilla (the armpit) is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment.
Dissection, neck
Surgery in which the neck is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment. A radical neck dissection involves removal of a tumor from the neck with an additional margin of apparently normal tissue of at least 2 cm, as well as removal of the lymph nodes from the neck.
Distance healing
Healing in which people seek to help patients simply with the power of the mind. Distance healing can include anything from therapeutic touch -- in which practitioners, without touching their patients, try to alter their energy fields -- to praying for people who are ill. Distance healing is part of the practice of alternative medicine.
Distichiasis
Double rows of eyelashes. The extra eyelashes grow from glands called the Meibomian glands and may protrude into the cornea, producing severe corneal abrasions.
Diverticulitis, bleeding from
Diverticular bleeding typically occurs intermittently over several days. Colonoscopy is usually performed to confirm the diagnosis and exclude bleeding from other causes. Thermal probes cannot be employed to stop active diverticular bleeding. Therefore, surgical removal of the bleeding diverticula is necessary for those with persistent bleeding.
RELATED TERMS--------------------------------------
Tissue
Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.
Anatomy
The study of form. Gross anatomy involves structures that can be seen with the naked eye. It is as opposed to microscopic anatomy (or histology) which involves structures seen under the microscope.
SIMILAR TERMS--------------------------------------
Dissect
To cut apart or separate tissue as, for example, for anatomical study or in surgery. Also, an artery is said to dissect when its wall is torn, as in a dissecting aneurysm.
Dissection, axillary
Surgery in which the axilla (the armpit) is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment.
Dissection, neck
Surgery in which the neck is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment. A radical neck dissection involves removal of a tumor from the neck with an additional margin of apparently normal tissue of at least 2 cm, as well as removal of the lymph nodes from the neck.
Dissociate
To separate or sunder that which is developing as a unity, or has become one, so that it becomes two or more unrelated or partially related entities. In mental life and its expression, these entities are experienced phenomenologically as trance states, alternative states of consciousness, fugue states, or multiple personalities.
Dissociation
disruption in the usually integrated functions of consciousness, memory, identity, or perception of the environment. The disturbance may be sudden or gradual, transient or chronic.
PREVIOUS AND NEXT TERMS--------------------------------------
Disordered thinking
A failure to be able to "think straight." Thoughts may come and go rapidly. The person may not be able to concentrate on one thought for very long and may be easily distracted, unable to focus attention. The person may be unable to connect thoughts into logical sequences, with thoughts becoming disorganized and fragmented. This lack of logical continuity of thought, termed a "thought disorder," can make conversation very difficult and may contribute to social isolation. If people cannot make sense of what an individual is saying, they are likely to become uncomfortable and tend to leave that person alone. Disorder thinking is a characteristic feature of schizophrenia.
Disorders, lymphoproliferative
Malignant diseases of the lymphoid cells and cells from the reticuloendothelial system (which take up and sequester inert particles). The lymphoproliferative disorders are in contrast to the myeloproliferative disorders which are malignancies of certain bone marrow cells including those that give rise to the red blood cells, the granulocytes (types of white blood cells), and the platelets (crucial to blood clotting).
Disorders, myeloproliferative
Malignant diseases of certain bone marrow cells including those that give rise to the red blood cells, the granulocytes (types of white blood cells), and the platelets (crucial to blood clotting). The myeloproliferative disorders include myelophthisic anemia, erythroblastic leukemia, leukemoid reaction, myelofibrosis, myeloid metaplasia, polycythemia vera, and thrombocytosis. The myeloproliferative disorders are in contrast to the lymphoproliferative disorders which are malignancies of lymphoid cells and cells of the reticuloendothelial system (such as macrophages) which can take up inert particles and sequester them.
Disruption sequence
The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the rubella (German measles) virus.
Dissect
To cut apart or separate tissue as, for example, for anatomical study or in surgery. Also, an artery is said to dissect when its wall is torn, as in a dissecting aneurysm.
Dissection
Dissection, axillary
Surgery in which the axilla (the armpit) is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment.
Dissection, neck
Surgery in which the neck is opened -- to "dissect" means to "cut apart" -- in order to identify, examine, and sometimes remove structures such as lymph nodes or other tissue for diagnosis or treatment. A radical neck dissection involves removal of a tumor from the neck with an additional margin of apparently normal tissue of at least 2 cm, as well as removal of the lymph nodes from the neck.
Distance healing
Healing in which people seek to help patients simply with the power of the mind. Distance healing can include anything from therapeutic touch -- in which practitioners, without touching their patients, try to alter their energy fields -- to praying for people who are ill. Distance healing is part of the practice of alternative medicine.
Distichiasis
Double rows of eyelashes. The extra eyelashes grow from glands called the Meibomian glands and may protrude into the cornea, producing severe corneal abrasions.
Diverticulitis, bleeding from
Diverticular bleeding typically occurs intermittently over several days. Colonoscopy is usually performed to confirm the diagnosis and exclude bleeding from other causes. Thermal probes cannot be employed to stop active diverticular bleeding. Therefore, surgical removal of the bleeding diverticula is necessary for those with persistent bleeding.
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This dictionary contains 19186 terms.
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