Most likely it's Drug-induced thrombocytopenia
✓Your mother is on multiple long-term drugs:
Letrozole,Zoledronic acid
,Magvastin (statin)
Statins, bisphosphonates, and even cancer-related hormonal therapy can suppress bone marrow or cause immune platelet destruction.
Next Steps
✓Platelet count 30,000 = high bleeding risk
Immediate Actions
Consult oncologist / physician URGENTLY
Health Tips
✓Repeat CBC with peripheral smear from a good clinical lab ,to Confirm true platelet count, rule out lab error.
✓
Vitamin B12 & Folate level needs to be checked
Deficiency causes isolated low platelets.