Cancer
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![illustration shows the gene-editing tool CRISPR depicted as a large claw-shaped protein complex. CRISPR is snipping into a long DNA molecule](https://cdn.mos.cms.futurecdn.net/pmaBHxrykjXYiA54PJbEtL-320-80.jpg)
CRISPR-edited fat shrank tumors in mice. Someday, it could work in people, scientists say.
By Kamal Nahas published
Genetically modified fat can be transplanted into mice to shrink mouse and transplanted human tumors, but this novel cancer therapy still needs to be tested in human trials.
![close up of a hand holding package of contraceptive pills](https://cdn.mos.cms.futurecdn.net/sr4RR64LdyRhjMkr89GVTX-320-80.jpg)
Hormonal birth control slightly increases breast cancer risk, regardless of type
By Rebecca Sohn published
Hormonal contraceptives slightly raise users' risk of breast cancer, regardless of whether they're combination or progestogen-only.
![microscopic image shows a prostate cancer cell, depicted in purplish blue, against a pink background of other cells](https://cdn.mos.cms.futurecdn.net/bNoH3WghRfxyau9dvrC4ai-320-80.jpg)
Prostate cancer treatments can be avoided or delayed in many cases, huge study finds
By Nicoletta Lanese published
A decades-long study finds that many prostate cancer patients can delay aggressive treatments and instead receive "active surveillance."
![woman holding her breasts to check for signs of cancer](https://cdn.mos.cms.futurecdn.net/SDgeKYTf472THrPXRQxX8W-320-80.jpg)
Breast cancer: Symptoms, treatment and prevention
By Rachael Rettner last updated
Breast cancer is the second most common cancer among women in the United States.
![Patient couple having doctor or psychologist consulting on marriage, fertility treatment for infertility](https://cdn.mos.cms.futurecdn.net/xMsqy7NVUuFNLoPNTdW8Ld-320-80.jpg)
Ovarian cancer: Symptoms, diagnosis and treatment
By Laura Geggel last updated
Ovarian cancer occurs when abnormal cells in the ovaries or fallopian tubes grow and multiply out of control.
![An ant drinking water pooling on a leaf.](https://cdn.mos.cms.futurecdn.net/AQTMy4kwvnULaBeADLQsFi-320-80.jpg)
Ants can detect the scent of cancer in urine
By Jennifer Nalewicki published
Ants use their antennae to sniff out cancer
![illustration depicts close up of two cancer cells, in red, growing atop a tissue depicted in blue](https://cdn.mos.cms.futurecdn.net/vFw6xE4ruCzw7VM6EAMZpQ-320-80.jpg)
Some cancer cells grow stronger after chemo. Research hints at how to kill them.
By Chengsheng Wu published
New research hints at why some cancer cells develop drug resistance, and how to kill them.
![photo of a young smiling girl wearing black-framed glasses and holding a blue teddy bear while sitting up in a hospital bed](https://cdn.mos.cms.futurecdn.net/V3Xpn9WuqzZVWSCMPRLEQJ-320-80.jpg)
A teen's cancer is in remission after she received new cells edited with CRISPR
By Nicoletta Lanese published
A young girl entered remission after receiving an experimental cancer treatment.
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