. Journal of radiology . v Fig. 2—a 19223)—Metastasis noduleswith feathery irregular borders. Page Three PULMONARY METASTASIS—CARMAN three times as often as the most nodules are circum-scribed, they may rarely have afeathery or irregular outline dueto the lessened resistance of thelung tissue and the greater viru-lence of the cancer. Microscop-ically, the periphery of this typeof nodule presents an irregularappearance similar to the infil-trating borders of a primarygrowth (Fig. 2). Aside fromthe foregoing exceptions, the dis-tinctive characteristics of the nod-ular type are the lar

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. Journal of radiology . v Fig. 2—a 19223)—Metastasis noduleswith feathery irregular borders. Page Three PULMONARY METASTASIS—CARMAN three times as often as the most nodules are circum-scribed, they may rarely have afeathery or irregular outline dueto the lessened resistance of thelung tissue and the greater viru-lence of the cancer. Microscop-ically, the periphery of this typeof nodule presents an irregularappearance similar to the infil-trating borders of a primarygrowth (Fig. 2). Aside fromthe foregoing exceptions, the dis-tinctive characteristics of the nod-ular type are the large size, thesharply outlined borders, the mul-tiplicity of nodules, and the in-volvement of both lungs. The miliary type of metastasisis marked by a shower of in-numerable, round or slightly ir-regular, small, discrete areas ofincreased density, varying in size from 4 mm. r 5 mm. to 1 depending on the stage of de-velopment. While they are most-ly discrete, the overlapping oftheir shadows may cause a c

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