He was gravely ill with multiple myeloma and was spending time at the Mayo Clinic.
One of the hardest plot decisions was what to do after actor Jim Davis, who played Jock Ewing, died in 1980 from multiple myeloma.
The death of actor Jim Davis from multiple myeloma in 1980 shook up the Dallas family.
multiple myeloma n.
A malignant proliferation of plasma cells in bone marrow causing numerous tumors and characterized by the presence of abnormal proteins in the blood.