Fatal or chronic granulomatous disease of childhood (CGD) is a genetically determined disorder affecting male children, with onset in the early months of life (2–4, 12–14). CGD is a clearly defined clinical syndrome characterized by protracted febrile illnesses, with frequent recurrences and early death. Purulent granulomatous and eczematoid skin lesions, granulomatous adenitis with suppuration, and pulmonary infiltrative disease are common presenting pathologic lesions. Less commonly, osteomyelitis or visceral abscesses are the basis for recurring febrile episodes in these patients. During active disease, appropriate febrile and leukocyte responses occur, and low-grade pyogenic bacteria may be cultured from suppurative lesions. Immunologic analysis of these children reveals that they possess at least normal amounts of each of the immunoglobulins, have normal antibody responses to a variety of antigens, have normal complement and complement components in their serum (6), and possess normal capacity to develop and express cellmediated immune responses (3). Recent investigation of the functional capacity of polymorphonuclear leukocytes (P.M.N.) from these patients revealed a striking and persistent deficiency of intracellular killing of a spectrum of bacteria associated with their suppurative lesions (7, 15, 16). Their leukocytes phagocytize bacteria normally, but certain bacteria are destroyed more slowly by the P.M.N.'s of these patients than they are by the P.M.N.'s of normal persons. Ultrastructural studies appear to indicate that the leukocytes of these patients fail to undergo the usual process of degranulation following phagocytosis (16), and biochemical (8–10) and histochemical abnormalities of these leukocytes have been defined (1, 17). The disease is transmitted as an X-linked recessive trait (14, 17, 18). Examination of the P.M.N.'s of mothers and maternal grandmothers of these patients with respect to biochemical characteristics, histochemical analysis, and killing capacity has revealed a degree of abnormality intermediate between that of boys with the disease and that of normal controls. This disease, although uncommon, is not rare, and it is clear from the series of patients beginning to appear in the literature that these patients will be encountered in significant numbers in all large medical centers. Consequently, it seems important to emphasize clinical and radiologic features of this disease which might suggest the diagnosis. I t is the purpose of this report to describe our radiologic experience with a series of 18 patients, representing 12 families studied at the University of Minnesota Hospitals between 1951 and 1967. Case Reports Seven representative patients are presented to illustrate the spectrum of clinical and radiologic findings which may be encountered.