Attention is called to the occurrence of a form of acute bone atrophy seen in young adults, usually after fixation of a limb for fracture. This phenomenon has also been seen by the author in four cases after disuse because of non-purulent infection in neighboring joints, and in two cases of tumor formation in the limb. This type of atrophy takes the form of a broad translucent band of bone resorption on the diaphyseal side of the epiphyseal line, parallel to the axis of the neighboring joint. This band occupies the same position as does a similar band of radiolucency in scurvy, which is sometimes called "Trümmer Zone " "Trümmerfeld Zone" (Baetjer-Windberger-King), or "Gerüstmarkzone" (Harris-Lehndorf). This peculiar form of atrophy should not be mistaken for fracture or acute disease.