. The elements of pathological histology with special reference to practical methods . poma or lipo-myxoma. Cysts filledwith liquid fat (oil cysts) occasionally occur in lipomata. Like thefibroma, the lipoma may occur in multiple form. 4. (iii.) Myxoma.—By the name myxomata are understood tumourscomposed of mucous tissue, that is, of a homogeneous, or sometimesalso striated or delicately fibrous, interstitial substance containingmucin, and in which are embedded stellate cells with anastomosingprocesses, together with spindle-shaped and round cells (Fig. 24).The tumours have a mucoid aspect eve
. The elements of pathological histology with special reference to practical methods . poma or lipo-myxoma. Cysts filledwith liquid fat (oil cysts) occasionally occur in lipomata. Like thefibroma, the lipoma may occur in multiple form. 4. (iii.) Myxoma.—By the name myxomata are understood tumourscomposed of mucous tissue, that is, of a homogeneous, or sometimesalso striated or delicately fibrous, interstitial substance containingmucin, and in which are embedded stellate cells with anastomosingprocesses, together with spindle-shaped and round cells (Fig. 24).The tumours have a mucoid aspect even to the naked eye, and shrinkvery greatly in alcohol. Their structure is distinctly alveolar. As mucous tissue is an embryonic form of connective tissue, manyauthorities class the myxoma with the sarcomata (as myxosarcoma),whilst others again allege that myxomata are developed from lipomata 80 TUMOURS OR NEW-FORMATIONS (by disappearance of fat from the cells), or from fibromata (byoedematous swelling of the connective tisssue). .^^0^^^•?:^3?^:?V:L V^<^^)Kj^%V~ /K^^A^•^^y^. ^-r-y^f. ? r Fio. 24.—Myxoma of the Labia, x 285. (sjtaiiicd with ;iluni cochineal.) Mucous tissue is often coupled in tumours with tissues of otherkinds, for example with fibrous or adipose tissue, cartilage, bone, ortissue composed of round or spindle cells, thus forming various mixedtumours which may be benign or malignant according to the characterof the second tissue. 5. (iv.) Chondroma.—This consists of cartilaginous tissue, of w^hichall three varieties may be present, hyaline cartilage being, however,the most frequent. Chondromata always have an envelope of con-nective tissue in which the vessels run, and which also sends processesinto their interior, thus causing a lobulation of the structure. The cells of the chondroma show the same multiplicity of variationsin number, size, and arrangement as those of normal cartilage. Some-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpatholo, bookyear1895
