1978 年 17 巻 1 号 p. 95-100
A case of multiple myeloma of the rib and thoracic vertebrae in a 75-year-old man is presented, together with the results of cytologic and light microscopic examinations.
The specimens were obtained by needle aspiration biopsy from the bone marrow of the sternum and the lesion of the rib. The M-G stain of the specimen obtained from the bone marrow revealed that the tumor cells had the features of myeloma cells.
The cytological findings of myeloma cells stained by the method of Papanicolaou have rarely been reported. The examination of the smears after Papanicolaou stain of the lesion of the rib in the present case revealed the following features ; the cells were round to oval; the cytoplasma was faintly stained by light green and had granules; the nuclei were all eccentric, and mostly had coarse granules and prominent nucleoli.