Manual of pathological anatomy . s these outgrowths must be clearly distinguished the truecartilaginous tumour (chondroma or enchondroma) which nevergrows from a pre-existing cartilage. Enchondroma,—This name was applied by Miiller to certaintumours essentially consisting of cartilaginous structure, whosereal nature was first discovered by him. Enchondroma formsusually a globular tumour,with a smooth or somewhattuberiform surface. Internallya section displays a structurewhich difiers much in differentcases, and is homogeneous, ex-cept in quite small some parts
Manual of pathological anatomy . s these outgrowths must be clearly distinguished the truecartilaginous tumour (chondroma or enchondroma) which nevergrows from a pre-existing cartilage. Enchondroma,—This name was applied by Miiller to certaintumours essentially consisting of cartilaginous structure, whosereal nature was first discovered by him. Enchondroma formsusually a globular tumour,with a smooth or somewhattuberiform surface. Internallya section displays a structurewhich difiers much in differentcases, and is homogeneous, ex-cept in quite small some parts aregelatinous, or almost liquid,and others are composed offibrous and vascular tissue. Some are composedof dense fibre-cartilage; inother cases this is replaced byan amorphous, firm intercel-lular substance, similar to hya-line cartilage. In fact, everyvariety of normal cartilage maybe met with in these tumours ;which occasionally present eventhe peculiar form of cartilagewith stellate anastomosing cells Fig. Enchondroma composed of fibro-cartilage;microscopic structure. (After Lebert.) found as a normal structure only in the The cartilage is in general arranged Hi^tokf^* ^^^^^^^ Pathology, second edition, p. 183; Wedl. Pathological+ Pagets ? Surgical Pathology, second edition, p. 495. 142 NEW GROWTH OF CARTILAGE. Fig. 20. in numerous lobules, not larger than a pea or a bean, surroundedand separated by fibrous partitions, which contain arrangement illustrates the physiological law that a non-vascular tissue cannot be nourished at more than a certaindistance from its blood-supply, and therefore cannot grow be-yond a certain size. It is saidthat a cartilaginous lobule some-times becomes vascular in itscentre, and then grows, by thecontinuous addition of layers ofcartilage to the outside; butthis arrangement is certainlyexceptional. The cells varysize, from -^T^th to
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