The Roadmaps - DI & IM2

The Six Stages of treatment for A.L.L.
Induction (4 weeks) *completed*
Consolidation (4 weeks) *completed*
Interim Maintenance 1 (IM1 - 8 weeks ending 8-07-2014)
Delayed Intensification (DI - 8 weeks beginning approx. 8-08-2014)
Interim Maintenance 2 (IM2 - 8 weeks)
Long Term Maintenance (2.5 years)

* Roadmaps for Induction, Consolidation, IM 1 detailed here. *

Delayed Intensification (DI) 56 days beginning approx. August 8
Jax will have peripheral blood work (from the arm, like a routine blood test) in Duncan, first thing in the morning on August 7 to see if his ANC and Platelets are high enough (ANC @ .75 and Platelets @ 75). Within an hour, we'll know if he reaches those criteria and will then immediately travel to Vancouver to begin Delayed Intensification at BCCH on Friday, August 8.  We need to go to BCCH for this procedure as our Oncologist in Victoria will be away on holidays, and there is no one else in Victoria who can administer the intrathecal methotrexate.  We have to be there for the Pegaspergase on Day 4 (Aug. 11) anyway, so it's not an extra trip - just a weekend at the new 
Ronald McDonald House in Vancouver!

If his counts don't reach the minimum required to begin this phase, we'll try again in another week.

This phase of treatment is aptly named, and likely to be the roughest stretch since the first 6 weeks.  He will receive a cocktail of 8 different chemo medicines over these 8 weeks, in addition to oral antibiotic (Septra) taken every Fri/Sat/Sun for the duration of his three year treatment, to protect against a certain kind of pheumonia that immunocompromised patients are susceptible to. 

He's going to feel really crummy. Two of the eight drugs in this phase are known to severely affect his ANC (immunity), which will reach all-time lows for several lengthy stretches. We will have to be extremely vigilant about any possible exposures to viruses and bacteria. He will most likely lose the rest of his hair. 

Day 1: *count dependant - ANC > 0.75 & Plts > 75 *
IT MTX (Sedated - Intrathecal Methotrexate)

IV VCR (Vincristine)

IV DOXO (Doxorubicin)
This will be a very long day, as the LP for IT MTX takes quite some time and the DOXO requires substantial hydration before, during and after administration, so that his kidneys can properly flush the medicine.

Day 4:

IV PEG-ASP (Pegaspargase)
This drug is known to trigger allergic (and other) reactions, and only certain hospitals have authorization to administer it. He has had it once before, on Day 4 of Induction, with no reaction. However, subsequent doses are more likely to trigger an allergic reaction.

Days 1-7:

Oral DEX (Dexamethasone)
Oral Ranitidine (to protect his stomach lining from the DEX)

Oral Liquid Sweetener ("Orasweet" - to protect his taste buds from the awful taste of the Ranitidine)

Day 8:

IV VCR

IV DOXO

Day 15:

IV VCR

IV DOXO

Days 15-21:

Oral DEX

Oral Ranitidine (to protect his stomach lining from the DEX)

Oral Liquid Sweetener (to protect his taste buds from the awful taste of the Ranitidine)

Day 29: *count dependant - ANC > 0.75 & Plts > 75 *

IT MTX (sedated)

IV CPM (Cyclophosphamide)

IV ARAC (Cytarabine)

Days 30-32 & 36-39

IV ARAC

Days 29-42

Oral TG (Thioguanine)

Interim Maintenance 2 (IM2) 
56 days beginning approx. early October
IM2 is almost identical to IM1, except that it has one additional IT MTX (sedated lumbar puncture/spinal tap).

Day 1 *count dependant - ANC > 0.75 & Plts > 75 *
IT MTX (sedated)
IV VCR
IV MTX

Day 11
IV VCR
IV MTX

Day 21
IV VCR
IV MTX

Day 31
IT MTX (sedated)
IV VCR
IV MTX

Day 41
IV VCR
IV MTX

Long Term Maintenance will begin on Day 57, or when ANC and Platelets reach .75 and 75. More about LTM in another post, as it gets a little bit complicated. He will be on one of four potential treatment protocols.

Standard course of treatment

At this stage in Jaxon's treatment, all indications are that he will follow this protocol, understanding that there may be delays or complications that could arise over the 3 year period.

About treatment, from the Children's Oncology Group website: 

(no longer available online - I'll have to find a new link. RZ 20-Apr-2025)

ALL is a cancer of the blood, so treatment is systemic, meaning it affects the entire body. At the time of diagnosis, the healthcare team will insert a central line to provide treatment.

Chemotherapy is the mainstay of treatment.

• Induction:
 The first phase of treatment usually lasts four weeks. Children receive three or four drugs by mouth, intravenously (into a vein), or into the spinal fluid (intrathecal delivery). The combination of drugs depends upon the leukemia factors as above. The goal of this phase is to kill the leukemia cells and allow normal blood cells to return.

A bone marrow aspirate is performed at the end of this phase. The bone marrow is examined under a microscope, and is expected to show only normal cells. This is called remission. This does not mean that the child is cured, because without further treatment the disease will return. However, it is a very important first step on the road towards being cured. Nearly 98 of every 100 children with ALL enter remission at the end of the first month of treatment. Other tests (such as minimal residual disease) may be performed on the bone marrow and may be more sensitive at finding leukemia cells than looking under a microscope.

• Consolidation:
 The second phase of treatment lasts from 12-16 weeks. Different drugs from those used during Induction are given by mouth and intravenously.

The purpose of the consolidation phase is to kill leukemia cells that may remain after the drugs used in induction. Another main focus is on treating and preventing the growth of leukemia cells within the central nervous system (CNS prophylaxis). To accomplish this, spinal taps with intrathecal chemotherapy (directly into the spinal fluid) are performed weekly. For certain types of leukemia, or if leukemia cells were present in the spinal fluid at the time of diagnosis, radiation therapy may be given to the brain and the spinal column during this phase. In most cases, part of the Consolidation phase will include treatment with the chemotherapy drug methotrexate. Methotrexate is given intravenously, either at lower doses in the clinic or at higher doses that require a 2-3 day stay in the hospital.

• Delayed intensification:
 This 8-week phase of treatment includes medicines similar to those given in Induction and Consolidation. This has been shown to be helpful in preventing leukemia from returning. The exact timing of the doses and the specific drugs used depend upon the individual characteristics of a particular child’s disease.

• Maintenance:
 The final phase of treatment lasts two or three years. Maintenance is much less intensive than the previous treatment and consists mostly of oral medications given at home. There are also intermittent intravenous and intrathecal medications given throughout this phase.