All Flashcards
What cancers are Pembrolizumab funded for on PBS?
NSCLC Melanoma Bladder GOJ/gastric Head and neck
Why are the ADRs of ipilimumab more severe than those of Pembrolizumab?
Ipilimumab is less specific for cancer cells
- ipilimumab binds the CTLA4 on the activated T cells to prevent CTLA4-B7 binding to the antigen presenting cell
- Pembrolizumab binds the PD1 on the activated T cell to prevent PD1-PDL1 binding to the tumour cell
Thus Pembrolizumab targets cancer cells specifically, vs ipilimumab non-specifically targeting APCs
What percentage of melanoma are BRAF positive?
40-60% melanoma are BRAF positive
- 80-90% of these are V600E (glutamic acid substituted for valine)
Treat with Dabrafabib/Vemurafenib (BRAF inh) with Trametinib (MEK inh)
What are the side effects of Dabrafenib?
Fatigue
Arthrarlgia
Alopecia
Skin SCC
Side effects of Trametinib?
Fever
But lower rate of skin SCC vs BRAF inhibitors
Current breast screening guidelines
Women 50-74 have free 2yrly mammograms
Bowel cancer screening in Australia
5yrly FOBT from age 50-74
If moderate risk/FHx - start screening at 50yo or 10yrs prior to 1st family member diagnosed
Cervical cancer screening
2yrly Pap smears for anyone sexually active 18-70yo
In what percentage of neutropenic sepsis is a causative organism found?
Causative organism only found in 20-30% (gram + > gram -)
What are the common cause of oncological spinal cord compression?
Lung
Prostrate
Breast
Haematological malignancies
Most common cause of SVC obstruction
Lung Ca
NHL
What is the role of bisphosphonates in malignancy?
Treating malignant hyperCa, bony metastasis, osteoporosis
No impact on survival
Increase time to developing a skeletal complication (pain, fracture, osteoporosis)
Mx: Zoledronic acid (for osteoporosis and bony mets); Denosumab approved only for prostate and breast Ca (higher risk of hypoCa)
Toxicity of Antheacyclines (doxorubicin/epirubicin)
Acute: arrhythmias, heart block ventricular dysfunction
Chronic: cardiomyopathy and heart failure
Monitor with 3/12 echo
Toxicity of florouracil/capecitabine
Chest pain due to coronary artery spasm
(High rates of spasm with PO > IV 5-FU)
Mx: stop drug, angio if possible
Toxicity of anti-angiogenic agents (bevacizumab/sunitinib/sorafenib)
Hypertension