Tumor Location

As indicated, certain bone tumors have a typical appearance with imaging, especially if low grade. Certain tumors also have predilection for specific bones and a specific location along a bone (epiphysis, metaphysis, diaphysis) (Figure 32.4). Most of these are benign.

In the realm of malignancy, the round cell tumors stand out in that they have both favorite locations and a typical appearance25,26; this includes both primary lymphoma of bone and Ewing sarcoma-PNET. These tumors are characteristically found along the shaft (diaphysis) of long bones, or on flat bones including the ilium, scapular body, and ribs. Their appearance is that of a lesion that permeates the cortex circumferentially in a manner similar to a sieve rather than causing focal cortical destruction. These tumors are almost uniformly associated with a large soft tissue mass, another feature not typically seen with other malignant bone tumors.

figure 32.4. Edema around a proximal tibia osteosarcoma. (A) The tumor is confined to the focal low signal area in the medial metaph-ysis. The heterogeneous marrow signal lateral and distal to the tumor represents edema. (B) With inversion recovery imaging (similar to fat-suppressed T2), edema in the surrounding marrow becomes high figure 32.4. Edema around a proximal tibia osteosarcoma. (A) The tumor is confined to the focal low signal area in the medial metaph-ysis. The heterogeneous marrow signal lateral and distal to the tumor represents edema. (B) With inversion recovery imaging (similar to fat-suppressed T2), edema in the surrounding marrow becomes high

A Disquistion On The Evils Of Using Tobacco

A Disquistion On The Evils Of Using Tobacco

Among the evils which a vitiated appetite has fastened upon mankind, those that arise from the use of Tobacco hold a prominent place, and call loudly for reform. We pity the poor Chinese, who stupifies body and mind with opium, and the wretched Hindoo, who is under a similar slavery to his favorite plant, the Betel but we present the humiliating spectacle of an enlightened and christian nation, wasting annually more than twenty-five millions of dollars, and destroying the health and the lives of thousands, by a practice not at all less degrading than that of the Chinese or Hindoo.

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