An abnormal lump made out of fatty tissueIn everyday speech a piece of tissue is a thin sheet of paper, used to wrap a present or, in a slightly different form, to blow the nose, or to be used in the toilet. In biology the word tissue refers to living material made up of cells or groups of cells of similar type or types. We may speak, for example, of nerve tissue or of fatty tissue, of glandular tissue or of connective tissue. Individual organs of the body, such as the brain, the heart, the liver or the kidneys, are made up of several tissue types, almost always including connective tissue.. Lipomas are commonly found in the normal fat layer under the skin, the layer referred to as “subcutaneous fat”. They are also sometimes found inside the brain or the spinal canalThe individual bones that comprise the spinal column are made up of a weight-bearing “body” and other components which, together, form a ring of bone, behind the body. These individual vertebrae, joined together as the spinal column, therefore, create a canal running down the entire length of the spine., as congenitalAn abnormality, structural or otherwise, which is present at birth, although its presence may not become evident until later in life, if at all. abnormalities. This is an abnormal state of affairs because fat is not normally found in these sites. The explanation lies in the embryonic development of the central nervous systemThe brain and spinal cord together make up the central nervous system. Nerves issue from both structures, passing out of the head and spinal canal, to supply all parts of the body, thereby allowing for voluntary movements to take place, various senses to be perceived and for the function of many internal organs to be regulated. Collectively, these nerves make up the peripheral nervous system.. When the neural tubeDuring development in the womb, the central nervous system first begins to form as a strip of tissue running down the back. This strip then rolls itself into a tube which sinks below the surface. The layer which closes over this tube develops into the skin. The neural tube itself then develops into the brain at the head end and, below, into the spinal cord. forms it detaches from the overlying layer of tissueIn everyday speech a piece of tissue is a thin sheet of paper, used to wrap a present or, in a slightly different form, to blow the nose, or to be used in the toilet. In biology the word tissue refers to living material made up of cells or groups of cells of similar type or types. We may speak, for example, of nerve tissue or of fatty tissue, of glandular tissue or of connective tissue. Individual organs of the body, such as the brain, the heart, the liver or the kidneys, are made up of several tissue types, almost always including connective tissue., known as the ectoderm. The ectoderm is destined to develop into the skin, as well as the hair, the nails and the teeth. If a small piece of embryonic ectoderm is carried into deeper layers of the developing body, along with the neural tubeDuring development in the womb, the central nervous system first begins to form as a strip of tissue running down the back. This strip then rolls itself into a tube which sinks below the surface. The layer which closes over this tube develops into the skin. The neural tube itself then develops into the brain at the head end and, below, into the spinal cord., it develops into a piece of skin-like material, within the brain or the spine This may be fatty tissueIn everyday speech a piece of tissue is a thin sheet of paper, used to wrap a present or, in a slightly different form, to blow the nose, or to be used in the toilet. In biology the word tissue refers to living material made up of cells or groups of cells of similar type or types. We may speak, for example, of nerve tissue or of fatty tissue, of glandular tissue or of connective tissue. Individual organs of the body, such as the brain, the heart, the liver or the kidneys, are made up of several tissue types, almost always including connective tissue. or other skin-derived abnormalities such as dermoidThis is a tumour which is made up of skin tissue that has become displaced, during embryonic development, and that has come to lie inside the cranial cavity, or the spinal canal. It is not a growth as such and is not malignant but it does expand slowly, over many years, as skin cells are shed into the centre of the mass. tumours.