Plasmocytoma of the Clavicle
THOMAS E. JONES, M.D.
Division of Surgery
JOHN B. HAZARD, M.D.
Department of Pathology
Solitary plasma cell myeloma of the bone is a rare disease, approximately 50 cases so designated having been recorded in the literature. Only 1 instance of myeloma beginning as an apparently solitary lesion in the clavicle is on record1 so far as can be determined. In the case to be presented the lesion appeared to be limited to the clavicle except for possible invasion of the sternoclavicular joint. Considering the difficulty of positively ruling out other osseous involvement, the term plasmocytoma, without further qualification, is considered a more accurate designation than solitary plasma cell myeloma.
The following case presents an interesting example of this type of primary neoplasm of the bone.
A colored housewife, aged 46, entered Cleveland Clinic on August 2, 1946, to consult Dr. T. E. Jones because of pain and swelling of the right shoulder. Three years before entry she had first experienced pain in the right shoulder with radiation up the neck and behind the right ear, and at that time a diagnosis of arthritis had been made. There was transient swelling over the clavicle. After a year the pain became so severe that she had to limit her activities for two weeks. Following this rest, the pain and swelling subsided. During the two years before entry pain had recurred intermittently, and during the year before admission the swelling had gradually increased in size. Following hard work it enlarged temporarily. At the time of entry the patient stated that she had no pain unless. . .