Oncology: Chemotherapy Flashcards

1
Q

Define Cure

A

tumour gone, no further therapy needed

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2
Q

Define complete remission (CR)

A

no evidence of tumour on physical exam, haematology, biochemistry, or imaging

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3
Q

Define partial remission (PR)

A

reduction in the sum of the longest diameters of ≥ 30% with no new lesions at 4 weeks

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4
Q

Define stable disease

A

no change at 4 weeks

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5
Q

Define progressive disease

A

increase of 20% or more in longest diameter at 4 weeks, or new lesions

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6
Q

Define induction therapy

A

intensive period to try and reduce the number of cancer cells

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7
Q

Define maintenance chemotherapy

A

less intensive to maintain remission

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8
Q

Define rescue chemotherapy

A

re-induction with non first-line agents when one protocol has failed

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9
Q

Define median survival time

A

(median response duration) = half of patients relapsed or died and half still in remission

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10
Q

Define disease free interval

A

= time to progression after onset of therapy, eg mets after osteosarcoma amputation

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11
Q

Define adjuvant chemotherapy

A

= administered after surgery or radiotherapy, usually to limit metastasis formation

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12
Q

Define neoadjuvant chemotherapy

A

to shrink the mass before surgery or radiotherapy

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13
Q

What is nadir?

A

point at which lowest white blood cell count occurs

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14
Q

Define maximum tolerated dose

A

maximum recommended dose of an agent, either at one time or cumulatively

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15
Q

What tumour types have a high sensitivity to chemotherapy

A

Lymphoma, myeloma and leukaemia

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16
Q

What tumour types have a moderate sensitivity to chemotherapy?

A

Adjuvant therapy of sarcomas and carcinomas

Mast cell tumours

17
Q

What tumour types have low sensitivity to chemotherapy?

A

slow growing sarcomas, some carcinomas, melanomas

18
Q

What are the two classifications of chemotherapeutic drugs?

A

Cell cycle non-specific: E.g. Alkylating agents which disrupt the DNA double helix

Cell cycle specific: E.g. Vinca alkaloids which interfere with spindle formation disrupting mitosis

19
Q

What do anti- metabolites do and give examples

A

Inhibit purine and pyrimidine syntheses
eg. cytarabine and 5-fluorouracil

S-phase specific

20
Q

What are mitotic spindle inhibitors, give examples.

A

aka Vinca alkaloids
eg.Vincristine, vinblastine

M-Phase specific

21
Q

Name the phase-non specific chemotherapy agents

A
  1. Alkylating agent (Disrupt the DNA)
  2. Anti-tumour antibiotic (bind DNA and stop replication)
  3. Other agents eg. cisplatin, carboplatin, L-asparaginase
22
Q

What order pharmacokinetics are cytotoxic drugs?

A

Cytotoxic cell kill is by first order kinetics ( The number of cancer cells killed by a drug is proportional to the dose)
…Therefore use highest possible dose without killing offs all the bone marrow

23
Q

What systems are affected the most by chemotherapy?

A

GI and bone marrow because they have lots of dividing cells

24
Q

What are the side effects associated with:
Cyclophosphamide.
Doxorubicin.
Vincristine.

A

Cyclophosphamide. Sterile haemorrhagic cystitis
Doxorubicin. Cardiotoxicity
Vincristine. Peripheral neuropathy

25
Q

What should you never do with chemo tablets?

A

Break them

26
Q

What is the aim of chemotherapy protocols?

A

Target tumours via as many routes as possible

eg. Combination protocol using cell cycle specific and non specific drugs

27
Q

What is the COP combined protocol?

A

COP (Cyclophopsamide, Vincristine (Oncovin), Prednisolone

28
Q

What is the COPH combined protocol?

A

COPH (Cyclophopsamide, Vincristine (Oncovin), Prednisolone, Doxorubicin (Hydroxydaunorubicin)