There are multiple definitions:

1. phrenic motor neuron(English)

   • specialized nerve cell in the cervical spinal cord (levels C3–C5) that controls the diaphragm, the primary muscle of respiration. They act as the vital relay between the brainstem’s breathing centers and the diaphragm
   • DRG
   • Neurons, Respiratory system, Spine (or spinal cord)
   • https://doi.org…esp.2011.02.014

2. polymorphonuclear neutrophil(English)

   • ANC
   • Hematology, Clinical chemistry, Infection, Orthopedics
   • https://doi.org…rth.2023.08.073

3. pre-metastatic niche(English)

   • refers to application of liquid biopsy for clinical diagnosis, prognosis, and treatment
   • CTC, CFDNA
   • Oncology, Diagnostics, Biopsy
   • https://doi.org…mmu.2022.958360