It is possible to divide these types of cancer into three broad groups on the basis of histogenesis that is, by identifying the particular type of tissue (hist/o) from which the tumor cells arise ( -genesis ). These major groups are carcinomas , sarcomas , and mixed tissue tumors.
Carcinomas
Carcinomas, the Largest group , are solid Tumors that are derived from etithelial tissue that lines external and internal body surfaces, including skin , glands , and digestive , urinary , and reproductive organs.
Sarcomas
Sarcomas are less common (less than 5 percent of all malignant tumors ) than carcinomas and are derived from connective tissues in the body, such as bone, fat, muscle, cartilage, and bone marrow and from cells of the lymphatic system.
PATHOLOGICAL DESCRIPTIONS
The following terms are used to descripe the apperance of a maligant tumor, on either gross (visual) or on microscopic examination
Cystic
Forming large open spaces filled with fluid.Mucinous tumors are filled with mucus (thick, sticky fluid ), and serous tumors are filled with a thin, watery fluid resembling serum. The most common site of cystic tumors is in ovaries.
Fungating
Mushrooming pattern of growth in which tumor cells pile one on top another and project from a tissue surface. Tumors found in the colon are often of this type.
Inflammatory
Having the features of inflammation ; that is, redness, sweling, and heat. Inflammatory changes result from tumor blockage of the lymphatic drainage of the skin, as in breast cancer.
Medullary
Pertaining to large, soft, fleshy tumors. Thyroid and breast tumors may be medullary.
Necrotic
Containing dead tissue. Any type of tumor can outgrow its blood supply and undergo necrosis.
Polypoid
Growths that are like projecttions extending outward from a base. Sessile polypoid tumors extend from a broad base, and pedunculated polypoid tumors extend from a stem or stalk. Both benign and maligant tumors of the colon may grow as polyps
Ulcerating
Characterized by an open, exposed surface resulting from the death of overlying tissue. Ulcerating tumors are often found in the sromach, breast, colon, and skin.
Verrucous
Resembling a wart-like growth. Tumors of the gingiva (cheek ) are frequently verrucous.
Carcinomas
Carcinomas, the Largest group , are solid Tumors that are derived from etithelial tissue that lines external and internal body surfaces, including skin , glands , and digestive , urinary , and reproductive organs.
Sarcomas
Sarcomas are less common (less than 5 percent of all malignant tumors ) than carcinomas and are derived from connective tissues in the body, such as bone, fat, muscle, cartilage, and bone marrow and from cells of the lymphatic system.
PATHOLOGICAL DESCRIPTIONS
The following terms are used to descripe the apperance of a maligant tumor, on either gross (visual) or on microscopic examination
Cystic
Forming large open spaces filled with fluid.Mucinous tumors are filled with mucus (thick, sticky fluid ), and serous tumors are filled with a thin, watery fluid resembling serum. The most common site of cystic tumors is in ovaries.
Fungating
Mushrooming pattern of growth in which tumor cells pile one on top another and project from a tissue surface. Tumors found in the colon are often of this type.
Inflammatory
Having the features of inflammation ; that is, redness, sweling, and heat. Inflammatory changes result from tumor blockage of the lymphatic drainage of the skin, as in breast cancer.
Medullary
Pertaining to large, soft, fleshy tumors. Thyroid and breast tumors may be medullary.
Necrotic
Containing dead tissue. Any type of tumor can outgrow its blood supply and undergo necrosis.
Polypoid
Growths that are like projecttions extending outward from a base. Sessile polypoid tumors extend from a broad base, and pedunculated polypoid tumors extend from a stem or stalk. Both benign and maligant tumors of the colon may grow as polyps
Ulcerating
Characterized by an open, exposed surface resulting from the death of overlying tissue. Ulcerating tumors are often found in the sromach, breast, colon, and skin.
Verrucous
Resembling a wart-like growth. Tumors of the gingiva (cheek ) are frequently verrucous.
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