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autologous blood and marrow transplantation - Blog Science ...

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306 Chapter 6: Breast Cancer<br />

patients who had a complete response in all visceral <strong>and</strong>/or nodal sites but had<br />

residual bone scan abnormalities with a negative positron emission tomography<br />

(PET) scan were defined as CR (+bone scan).<br />

Apheresis procedure<br />

The apheresis procedure has been previously described. 17<br />

Briefly, apheresis was<br />

initiated when the PB CD34 count exceeded 5X10 6<br />

/L. By employing this trigger<br />

point for initiating apheresis, patients were harvested 8-16 days after mobilization.<br />

For patients mobilized with G-CSF alone, apheresis was commenced on day 5.<br />

Apheresis was continued until sufficient cells to support three separate cycles of<br />

high-dose therapy had been collected, i.e., a minimum target of 4.5 X 10 6<br />

/kg (three<br />

cycles of high-dose therapy, each with a minimum of 1.5X10 6<br />

/kg CD34 +<br />

cells).<br />

Repeat PBPC collection was performed if the initial set of collections was deemed<br />

inadequate (i.e., initial total collection

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