Category: Medical oncology and care during treatment
ALK-Positive Lung Cancer: A CT Note That Looks Smaller, and a Pause Set by the Oncologist
Quick answer
A smaller-looking CT opacity is a description, not a response category. A 2017 review kept 27 of 635 papers: one radiation visit and several visits gave similar pain relief for uncomplicated painful bone metastases. The pause is that oncologist’s plan. How often an ALK-inhibitor stop causes rapid worsening is unknown.
Symptoms that need the team the same day
- Sudden severe breathlessness, including while sitting still
- Coughing blood
- New severe back pain with leg weakness or numbness, especially in both legs, or new inability to pass urine
- Fever or shaking chills during chemotherapy, or soon after a dose
These sit above a planned bone scan or a planned radiation visit. This page does not set a new temperature cutoff.
One member’s question
One member in a cancer group described ALK-positive lung cancer, a chest CT note that an infiltrative lesion looked smaller, chemotherapy, severe fatigue, a conversation with the doctor about pausing treatment, and a plan for a bone scan and bone radiation. This page answers that question. It is not anyone’s chart, and it does not confirm where the cancer has spread.
1. A sentence on the CT report is not a response category
A note that a shadow looks smaller is the radiologist’s description. It is not a response category.
“Looks smaller” is a description
The radiologist writes what is visible on that study. A note that an infiltrative opacity looks smaller says the shadow in the chest looks reduced compared with the image the reader had in mind. It is not the name of a partial-response category, and it does not measure a percent change.
One person’s scan is not a group rate
Comparing this study with the previous one, measuring lesions, and deciding whether the current drug plan continues belong to the oncology team that holds the full set of images. This page has no response-rate figure for ALK treatment, because that abstract was not used here.
2. A pause is that oncologist’s plan
A pause the oncologist has written belongs to that person. The name treatment holiday does not keep the treatment effect.
Fatigue is a common treatment effect
The NCCN Cancer-Related Fatigue guideline, version 2.2015 (PMID 26285247), defines it as physical, emotional, or cognitive tiredness that is persistent, out of proportion to recent activity, and interferes with usual functioning. It is one of the most common effects during treatment, it can persist afterward, and the guideline calls for routine screening. That abstract does not say fatigue comes from inflammatory signals of a dissolving tumor, and it does not say a pause restores bone marrow, liver, or kidney in every person.
The 2014 ASCO adaptation (PMID 24733803) is for adults who have finished primary treatment. It says every such person should be checked for fatigue, and moderate or severe fatigue needs a search for treatable causes. In that group, physical activity, psychosocial care, and mind-body practices may reduce fatigue. That abstract is not a protocol for someone still in treatment for metastatic lung cancer.
The name treatment holiday does not keep the drug effect
Some people call a physician-set pause a treatment holiday. The name is not evidence that the treatment effect stays. This page does not tell anyone to stop a medicine, and it does not tell anyone to restart it. If the treating oncologist has already written a pause, that plan belongs to that person. Treatable contributors, such as anemia, infection, pain, poor sleep, or overlapping medicines, belong to the same team.
Rapid worsening after an ALK inhibitor was stopped has been reported
One case report (PMID 24019783) describes ALK-positive lung cancer in which crizotinib produced a partial response for 10 months, then the cancer grew. After the drug was stopped the disease worsened rapidly, and restarting it did not reverse that worsening. The authors state that how often this happens is unknown and that it is not possible to predict who will have it. The person in that report had already grown through the drug before it was stopped. That report does not describe every person who pauses for fatigue. New symptoms during a pause need the team the same day.
How urgent do cancer-care signals feel?
Our Advisory team can help sort severity and offer personalized guidance. The score does not read a CT and does not approve stopping a medicine. Sudden breathlessness, coughing blood, back pain with leg weakness, or fever with shaking chills needs emergency care before the score.
3. A bone scan and radiation aimed at pain
A bone scan and radiation are tools for looking at and easing pain in a bone the team selects. They are not a promise that the bone will not break.
A bone scan is not the radiation field
A bone scan is one way a team looks for abnormal bone activity. The scan alone does not choose the radiation field, and it does not mean every bright spot must be treated. The radiation team chooses the site and the number of visits.
Pain relief in the literature is not a fracture promise
A 2017 review (PMID 28249544) kept 27 of 635 search results. Single-fraction and multiple-fraction radiotherapy gave similar pain relief for painful uncomplicated bone metastases. The abstract says the best single-fraction dose is still uncertain. In direct comparisons, 8 Gy was statistically superior to 4 Gy or 6 Gy, and 8 Gy was the most commonly used single fraction. Few studies recorded other doses. This page does not turn those figures into a dose to request. The review does not conclude that a bone will not break, and it does not conclude that walking becomes comfortable for every person.
Spinal cord compression is a different visit
New severe back pain with leg weakness or numbness, or new inability to pass urine, needs the emergency department the same day. It is not a reason to wait for a bone-radiation appointment that is already on the calendar.
4. Three questions that get folded into one
The CT sentence, the pause, and bone radiation are three separate questions.
This table separates questions. It does not decide one person’s plan.
| Question | A sentence on the CT | That oncologist’s pause | Bone radiation |
|---|---|---|---|
| What it is | A description that a shadow looks smaller | A stop the treating oncologist has written | Radiation to a bone site the team selects |
| What this page does not conclude | It does not prove the cancer is dissolving | It does not keep the treatment effect, and it is not a self-stop order | It does not prevent fracture in every person |
| Who decides | The oncology team with the full images | The treating oncologist | The radiation team |
What to tell the team, and what this page does not replace
| Topic | What to do with the team | What this page does not replace |
|---|---|---|
| Fatigue | Report how severe it is and how it changes daily activity | It does not mean the tumor is dissolving |
| Food | Follow the plan the cancer nutrition team already set | This page sets no protein grams and no water volume |
| New symptoms | Breathlessness, coughing blood, back pain with leg weakness, or fever with chills: contact the team the same day | The score does not replace the emergency department |
Numbers the abstracts actually give
The four rows below are figures from those abstracts. Each row is that study’s result, not the result of the person reading this page.
Figures from the abstracts, and the limit on using them for one person
| Source | Figure in the abstract | Limit |
|---|---|---|
| Bone radiation, 2017 | 27 of 635 papers. One visit and several visits gave similar pain relief. In direct comparisons, 8 Gy beat 4 Gy or 6 Gy. The best dose was still uncertain. | Not a dose to request, and not fracture prevention |
| Drug-stop report, 2013 | Partial response for 10 months, then growth. Rapid worsening after the stop. Frequency unknown. | One person whose cancer had already grown. Not every fatigue pause. |
| NCCN, 2015 | Tiredness that persists and is out of proportion to recent activity. Screen routinely. | No claim about inflammatory signals from a dissolving mass, and no claim that a pause restores marrow |
| ASCO, 2014 | Check everyone after primary treatment. Moderate or severe fatigue needs a search for treatable causes. | Not a protocol during treatment for metastatic lung cancer |
What this page takes from the abstracts
Reviewed by Asst. Prof. Dr. Norawit Raatpiboon. Cancer-related fatigue, in the 2015 NCCN definition, interferes with daily life, is common during treatment, and is not a marker that a mass is dissolving. Bone radiation in the 2017 review, which kept 27 of 635 papers, is a pain tool for painful uncomplicated bone metastases, with similar relief from one visit or several. The 2013 report is one person whose partial response lasted 10 months, after which the cancer grew and then worsened rapidly once the drug was stopped. The frequency is unknown.
Frequently asked questions
The six answers below come from four abstracts. They do not read one person’s scan.
Does a CT note that an infiltrative opacity looks smaller mean the cancer is dissolving?
It is a sentence in the radiology report. It is not a formal response category, and it does not prove the cancer is dissolving. Comparing this scan with the previous one belongs to the oncology team.
Does a pause for severe fatigue keep the treatment effect?
This page has no such finding. The pause is that oncologist’s plan. In one report, crizotinib produced a partial response for 10 months, then the cancer grew. After the drug was stopped the disease worsened rapidly, and restarting it did not reverse that. How often this happens is unknown. This page does not tell anyone to stop or restart a medicine.
Does severe fatigue mean the cancer cells are dying?
The 2015 NCCN definition calls cancer-related fatigue a persistent tiredness, out of proportion to recent activity, that interferes with usual functioning. It is one of the most common treatment effects, and the guideline calls for routine screening. That abstract does not say fatigue means the tumor is dissolving.
Will a bone scan plus radiation stop fractures and make walking comfortable?
A 2017 review kept 27 of 635 papers. Single-fraction and multiple-fraction radiotherapy gave similar pain relief for painful uncomplicated bone metastases. In direct comparisons, 8 Gy was statistically superior to 4 Gy or 6 Gy, and the best single-fraction dose was still uncertain. This page does not turn those numbers into a dose to request, and it does not conclude that a bone will not break.
Which symptoms need emergency care the same day?
Sudden severe breathlessness, coughing blood, new severe back pain with leg weakness or numbness, especially in both legs, or new inability to pass urine, and fever or shaking chills during or soon after chemotherapy.
Can the score on this page approve a treatment pause?
No. The score does not read a CT and does not approve stopping a medicine. Red-flag symptoms need emergency care before the score.
Sources
These four abstracts are the sources of the figures on this page.
- NCCN. Cancer-Related Fatigue, Version 2.2015. PMID 26285247
- ASCO adaptation. Fatigue in adult survivors after primary treatment. 2014. PMID 24733803
- Disease flare after discontinuation of crizotinib in ALK-positive lung cancer. 2013. PMID 24019783
- Single-fraction radiotherapy for painful uncomplicated bone metastases: systematic review. 2017. PMID 28249544
Medical disclaimer
This page is general education. It does not read anyone’s scan, and it is not an order to stop or start a medicine. The drug plan, the radiation plan, and any pause belong to the treating oncologist. Red-flag symptoms need emergency care the same day.