According to a press release from the Philadelphia 76ers, Markelle Fultz has been diagnosed with Thoracic outlet syndrome:
“STATEMENT FROM PHILADELPHIA 76ERS VICE PRESIDENT OF ATHLETE CARE DR. DANIEL MEDINA:
DEC. 4, 2018 — Markelle Fultz has recently completed a thorough series of consultations with specialists across several disciplines. Thoracic outlet syndrome, which involves compression or irritation in the thoracic outlet (area between lower neck and upper chest), was identified.
Physical therapy was recommended for Fultz before returning to play.
Fultz will begin this physical therapy immediately, is out indefinitely, and further updates will be provided as appropriate.