18 votes
Accepted

Can N95 face masks filter out benzopyrene, polycyclic aromatic hydrocarbons or formaldehyde?

No. No, no, no. Covid face masks help prevent contagious disease. They are not meant for anything else. Period. End of public health announcement. To be clear, N95 facemasks are particulate ...
David West's user avatar
15 votes
Accepted

Why is there is no screening for Ovarian Cancer?

Screening tests are done across the population of asymptomatic people at risk of a disease (e.g. mammogram to look for breast cancer in all women with breasts) to try to catch disease early in its ...
DoctorWhom's user avatar
  • 5,814
12 votes

CT scans and cancer risk

Every procedure has to be weighed for potential costs and benefits. Cancer is a risk already present and might shorten a life, CT scans on the other hand are done to prolong a life. The exact risks (...
LаngLаngС's user avatar
  • 6,907
11 votes

Is there any health risk in cellular phones?

Exposure to ionizing radiation, such as from x-rays, is known to increase the risk of cancer. However, although many studies have examined the potential health effects of non-ionizing radiation from ...
Refractor's user avatar
  • 139
9 votes

Is a hyperventilation+hypoventilation breathing exercise (Wim Hof Method) more likely to prevent or promote cancer?

Hyperventilation can lead to reduced oxygen transport to cells. As a result, ineffective breathing patterns can cause cell and tissue hypoxia, chronic inflammation, immunosuppression, and many other ...
Taylor's user avatar
  • 958
9 votes

Is Cow Milk unhealthy?

In short: According to several recent systematic reviews of studies, milk consumption is not associated with significant side effects, increased mortality, cancer, osteoporosis, heart disease or ...
Jan's user avatar
  • 15.9k
8 votes

How does the rare cancer mucinous carcinoma respond to radiotherapy?

A retrospective cohort study by Mo et al published in 2022 concluded the following: Among women with T1-2N0M0 (tumor size ≤ 3 cm) pure mucinous breast cancer, the addition of radiotherapy after ...
Chris's user avatar
  • 3,382
7 votes

Safety of using a luggage with the prop. 65 warning

I think the currently accepted answer is incorrect on a number of points. The official California Proposition 65 (aka OEHHA) site FAQ, has more accurate information. There is also another FAQ from the ...
Uniphonic's user avatar
  • 229
7 votes
Accepted

How is hereditary cancer risk estimated?

There are really two distinct questions here, but they are common. Is cancer heritable? Is cancer (or cancer risk) contagious? tl;dr Most cancer cases are not heritable. Some are. Heritable cases ...
De Novo's user avatar
  • 3,178
7 votes
Accepted

The Ethics of extra treatment

You're describing an unexpected intra-operative finding. The possibility of unexpected findings (and their treatment) is usually discussed during the consent for the original procedure. Of course, in ...
De Novo's user avatar
  • 3,178
7 votes
Accepted

Meaning of "Chest wall, Sp, Ps" in a description of tumor recurrence locations

Mr. Hiroyasu Yamashiro wrote an anwer: Thank you for your question about the paper. The meaning of the abbreviations you ask is as follows. Thank you. Sp - Supraclavicular lymph nodes ...
CowperKettle's user avatar
  • 1,630
6 votes

Real dangers of CT Scan made only once at age of 31

CT brain at 31, what's the risk? Short answer: Very little, compared to overall cancer risk* Longer answer: Your girlfriend is concerned about increased risk of brain malignancy due to having a CT at ...
bertieb's user avatar
  • 701
6 votes

Occasional medical tests and imageries

Screening tests such as "blood tests and imaging" have two costs and one benefit: the cost (dollars and possible health problems) of the actual screening, which can in some cases be free the cost (...
Kate Gregory's user avatar
  • 3,919
6 votes

Occasional medical tests and imageries

Great answer above. This is to add on to it: Making a decision on whether to recommend screening tests for the entire population is different from deciding whether to screen an individual patient. ...
DoctorWhom's user avatar
  • 5,814
6 votes
Accepted

Is a hyperventilation+hypoventilation breathing exercise (Wim Hof Method) more likely to prevent or promote cancer?

Apart from monks and nuns who showcase impressive abilities Wim Hof is onto something. One anecdote reads as follows: I’ve also experienced the positive changes myself, […] My cardiovascular and ...
LаngLаngС's user avatar
  • 6,907
6 votes

What study materials can a layperson use to gain a deeper understanding of lung cancer?

Cancer can be one of the most complicated concepts in medicine, not only because of the pathophysiology of cancer, but the complicated statistics involved in the epidemiology of the diseases and ...
DoctorWhom's user avatar
  • 5,814
6 votes
Accepted

Isn't "epithelial carcinoma" a tautological term? Are there non-epithelial carcinomas?

You are correct that carcinoma refers to types of cancer arising from epithelial tissue. Definition of carcinoma: Cancer that begins in the skin or in tissues that line or cover body organs. ...
Chris's user avatar
  • 3,382
6 votes

Why is there is no screening for Ovarian Cancer?

It's interesting that you picked this one specific example, because it happens to have been studied by Gigerenzer, a prominent expert on risk perception. It also showcases that one shouldn't insist ...
rumtscho's user avatar
  • 2,793
6 votes

Can N95 face masks filter out benzopyrene, polycyclic aromatic hydrocarbons or formaldehyde?

TL;DR - The specific answer is "NO, N95 masks cannot reliably protect one from the questioned chemicals/compounds". But there's so much more to consider... This supplemental answer is more ...
zombiefeeder's user avatar
6 votes

How does the rare cancer mucinous carcinoma respond to radiotherapy?

In addition to Chris's answer. I see the following article in Pubmed: Di Saverio S, Gutierrez J, Avisar E. A retrospective review with long term follow up of 11,400 cases of pure mucinous breast ...
bob1's user avatar
  • 3,486
6 votes
Accepted

Why is this cancer biomarker not used clinically?

Here are some general ideas regarding factors affecting implementation of biomarkers into a clinical setting. Biomarker performance biomarkers are often discovered with specific experimental designs,...
jkd's user avatar
  • 176
5 votes
Accepted

Accelerated tumor growth after stopping prednisolone?

I am not a veterinary so I can't answer your question in particular. Though, maybe following points on the mechanisms of action of prednisolone might perhaps bring some clarifications: Prednisolone ...
M. Arrowsmith's user avatar
5 votes

Is hemp oil the same as CBD oil?

Hemp oil is made from the seeds of the cannabis plants. These typically contain almost no cannabinoids, like THC or CBD. CBD-oil is any oil, not only hemp oil, enriched with CBD. The industry seems to ...
LаngLаngС's user avatar
  • 6,907
5 votes
Accepted

How do you filter out Benzene?

VOCs are one of the most prevalent indoor air pollutants. They are released by many common materials, from foams to carpets to paints. House air circulation is not very conducive to adequate ...
DoctorWhom's user avatar
  • 5,814
5 votes

Why are airplane pilots more likely to have skin cancer?

A recent study confirmed the increased risk of airline pilots of a certain type of skin cancer (basal cell carcinoma or "BCC"). Incidence of cancer among licenced commercial pilots flying North ...
Dr SD's user avatar
  • 81
5 votes
Accepted

Can ear cancer occur?

Yes, there is ear cancer, both middle / inner ear and outer ear. See Cancer of the ear. Most of these are types of skin cancer. The most common type of cancer of the ear is squamous cell carcinomas....
Dijkgraaf's user avatar
  • 269
5 votes
Accepted

Why can't Jane give blood?

I presume she is at risk for developing bowel malignancy at some time in the future. So, unless she is screened very regularly, then if she is accepted as a blood donor, she might be donating blood ...
Graham Chiu's user avatar
  • 13.3k
5 votes
Accepted

Is Cow Milk unhealthy?

There are several issues regarding dairy that have to be taken into consideration. One is the link between casein and cancers. I have heard a presentation from the author of some of the prominent ...
DoctorWhom's user avatar
  • 5,814
5 votes

Does a cancer survivor have a higher than average risk of future cancer?

The first part of your question is very difficult to answer for the reasons mentioned in Narusan's comment: Specifically, comparing cancer incidence rates between many different groups of cancer ...
Bruce Kirkpatrick's user avatar
5 votes

Does Nicotine cause Cancer?

There is not enough evidence either in support or in rebuttal... EFFECTS OF CHRONIC OR REPEATED EXPOSURE: Nicotine is a teratogen (capable of causing birth defects). Other developmental toxicity ...
Narusan's user avatar
  • 6,911

Only top scored, non community-wiki answers of a minimum length are eligible