[mī′ə-lŏfthĭ-sĭs, -lō-tī-]
  1. Wasting or atrophy of the spinal cord.
  2. Replacement of hemopoietic tissue in the bone marrow by abnormal tissue, usually fibrous tissue or malignant tumors.panmyelophthisis
Related formsmy′e•lo•phthisic (mī′ə-lō-tĭzĭk, -tīzĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.