Dr. Jefferson Chen

Neurosurgery
Portland, OR
36 years experience male

Locations

Office

Portland, OR

Address

501 N. Graham # 580, Portland, OR, US
Directions

Insurances accepted

Aetna

BlueCross BlueShield

Medicare

UnitedHealthcare

CIGNA Health Care

Providence Health Plans

LifeWise Health Plan of Oregon

Office

Portland, OR

Office

Portland, OR

About

Bio

My neurosurgery practice is focused at Legacy Emanuel Hospital in the neurosurgery subspecialties of: 1. NeuroTrauma and NeuroCritical Care -Surgical treatment of head injury and specific types of stroke -Neurological ICU management with multimodal brain monitoring (ICP, Brain oxygen, Brain flow, Brain chemistry) 2. Brain Tumors (both primary and metastatic) -Surgical treatment using modern neurosurgical techniques (neuronavigation, Awake Craniotomies, Brainpath) -Radiosurgery techniques using Gamma Knife (framed technique) and Novalis(frameless technique) technologies 3. Normal Pressure Hydrocephalus I actively participate in local and national/international research and clinical trials in these fields. I am active in local supprot groups for these patients.

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Neurosurgery

Doctor Q&A

704 Answers
305 Agrees
The number of answers this doctor has agreed with.
A 21-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Teflon: Generally for a microvascular decompression an inert substance like a sterile teflon pledget is used to pad the nerve. This helps to shield the nerv... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
This varies: The length of time that it takes a pituitary adenoma to grow to 2 cm varies depending on the type of tumor and whether or not it is hormonally active ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 41-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
No: Gliomas arise from brain astrocytes, ependyma cells(lines the ventricles), or oligodendrocytes (cells that make the coverings of nerves). The most com... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Poor survival rate: Brainstem gliomas are primary brain tumors that arise from the glial tissue and are usually astrocytomas (grades 1-4). Diagnosis is by mri. Rarely ar... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Surgery: For the classic large epidural hematoma from an arterial bleed, the treatment is surgery urgently. This involves a craniotomy (opening the skull), eva... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Prevention: The best way to treat brain injury is prevention. For example, wearing helmets and avoid activities where you may hurt your head. If you are inquiring... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 21-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Central & peripheral: That is a big question. When you talk about nerves generically, you could be referring to the neurons or nerves of the brain and spine-ie. The central... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Unlikely if removed: Surgical removal of the avm leads to obliteration of the nidus. If there is angiographic demonstration that this is gone, then it is not likely that i... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Possibly: It sounds like you are losing weight intentionally. This may suggest back and disc disease which leads to the symptoms. With respect to the lumbar dra... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 41-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Surgery is risky: Brainstem cancers are usually intrinsic to the brainstem. That is, they invade the brainstem and are infiltrative. Surgery to remove them is usually v... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Cerebrovascular : Cerebrovascular disease isto disease of the vessels foind in the brain. This is most usually in reference to stroke where there is the buildup of arte... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 17-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
For the best study: For brain tumors, a ct scan of the head without and with contrast best delineates the tumor. To check for an aneurysm, contrast is needed for the ct-a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Mutations: Ionizing radiation such as used in the past for tinea capitis (ringworm of the scalp) has been shown to have an increased incidence of meningiomas. It... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Yes: Memory loss is the most common symptom of alzheimer's. However, alzheimer's dementia refers to a global decline in cognitive abilities. Problems with ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Have it evaluated: It is certainly possible that some of the headaches may be related to surgical healing. However, there are well known long term sequelae from brain an... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Very serious: The seriousness of a brain hemorrhage depends on the size, location and cause. Invariably, there are neurological issues. The degree of recovery is al... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Possibly: Tbi can affect the nerves that control the movement of the eyes. This can lead to double vision. Also double vision can occur because of direct injur... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Guarded, but depends: The hypothalamus is a critical region and a stroke-either hemorrhagic or ischemic can have profound symptoms. It depends on the extent and size of the... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
CT, LP: Start with the clinical symptoms which are usually headache. The classic symptom is the "worst headache" of one's life. Cat scans are very good for de... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
6-8 weeks: Most of the symptoms of a "simple" concussion are usually self-limited to a 6-12 weeks. You may need further evaluation including cts or mris to check... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 35-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Still debated: There is a lot of data that suggests that cavernous malformations are not effectively treated by stereotactic radiosurgery. Surgery is the preferred t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
MRI-brain imaging: Mri(magnetic resonance imaging) uses high magnetic fields to image the head. It is particularly sensitive for imaging the brain and other soft tissues... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Location and size: The location and the size of the intracerebral hemorrhage as well as the interventions done can affect the outcome. Also the co-morbidities (ie. Other... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Can be cumulative: Most patients recover from a single concussion with little neurological sequelae. However, multiple concussions can lead to long term effects such as ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 29-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Long term control: A grade i glioma is low grade. They are more common in the pediatric population. They tend to be indolent and very slow growing. The pilocytic varian... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Check with doctor: This is typically not related directly to the brain tumor. It sounds like this is a reaction either to radiation or chemotherapy. Check with your phys... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Nerves in dura: It is true that there are no nerves in the brain that sense pain. However, there are nerves in the linings of the brain, the dura that have pain modal... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 44-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Non-specific term: Brain lesions is a non-specific term referring to abnormalites seen either on ct scan or MRI scan. These are varied and some can have severe clinical ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Depends on the type: Brain tumors can develop symptoms very rapidly. This depends on the type and the location. A tumor that is near an eloquent area (ie. Controls motor ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Depends on therapy: This would depend on the type of cancer, and the type of treatment. If it is one that required surgery and some healing time, then certainly one needs... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 35-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Generally not: Isolated pituitary tumors generally are not genetic. These are the majority of the pituitary tumors and include prolactin, growth hormone, and non-sec... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 42-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Depends on location: Spinal cancer can refer to a cancer that involves the bones(vertebral bodies) or the spinal cord itself. It it involves the bones, this is usually a ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Sudden headache: Brain aneurysms are usually undetected except when they rupture. When this happens it is cataclysmic with the sudden onset of the "worst headache of o... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
A tough situation: This is a tough situation and a social dilemma. The first thing is to get information about the tumor type. Remember not all brain tumors are lethal.... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Unclear: It depends on the characteristics of the "black holes" that you see on the mri. Although they are in the white matter, there are some characteristic a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Unusual: It is unusual to have headaches for that long a period. A bit more information about the injury-loss of consciousness or external bleeding? Also, one ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Have it checked: There may be local nerve damage if there was a large bruise over the eyebrow. There may also be an underlying skull fracture. Generally this is from ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
No delay: Patients with an an aneurysm usually present acutely with a rupture. Once the rupture occurs, the blood spills out into the brain. The symptoms are in... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Neuro-otology: It is not uncommon for a patient to have balance problems after brain injury. This may be related to damage to the semi-circular canals in the tempor... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 29-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Check with your Dr.: The effects of repeated concussions vary depending on the number and severity. There is the entity of dementia pugilistica reported in boxers. You sho... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 36-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Information: I help with our brain tumor support group. This offers patients a venue to meet other patients and their families. They can discuss their experiences ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 36-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Normalize hormones: Cushing's disease (presumably of pituitary origin) leads to excess cortisol secretion. This leads to hypertension, increased heart size, weight gain, ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 36-year-old male asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Not necessarily: Trigeminal neuralgia or tic douloreux is classically described as facial pain in one of the three distributions of the trigeminal nerve. These three ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Depends cyst size: This would depend on the size and location of the cyst. If it is large, it can compress on the surrounding brain that might lead to some of the headac... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Possibly: Repeated concussions within a short period of time are bad because of the cumulative effect of the concussions. It is well known that the brain is hyp... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 31-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Yes: Benign brain tumors can be very slow growing. They may be undected because of their slow growth or because they are not pressing on anything that may ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Depends on symptoms: The extent of the black eye is important to know. If it encompasses the entire eye (ie. 360 degrees) and if there is double vision or limitation of mo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
See your doctor: This is an unusual symptom. There are brain tumors of the temporal lobe that can lead to olfactory auras or hallucinations. Patients typically descri... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old female asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Possibly: After over 8 years, it is unlikely that memory will improve. However, intense cognitive therapy may help one to recognize and learn to compensate for ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 31-year-old member asked:
Dr. Jefferson Chen
Neurosurgery 36 years experience
Seek medical help: Without knowing specifics, its hard to say. But speaking with your family doctor may help to direct the course of diagnostic studies if any. There are... Read More
Created for people with ongoing healthcare needs but benefits everyone.

Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

10
Recommendations
536
Thank you notes
Apr 24, 2013
Dr. Chen provides an exceptional public service on Healthtap. He is clearly extremely knowledgable about neurosurgery. I learn from reading the information he presents on health tap. I recommend Dr. C...Read More
Apr 22, 2013
Has always taken time for me when I've called to request help off him. Has always treated me as a respected colleague and I'm grateful to know he's there for me should my patients' needs arisenn
Jul 6, 2013
Dr. Chen provides articulate, helpful answers about complicated neurosurgical/neurological topics. He writes calmly and respectfully too. Thank you, Dr. Chen!
HealthTap member
This was very helpful. Thanks! My CT-scan had similar finding and I didn't understand any of it. Your response was very helpful because I do have trouble walking and a difficult time moving my left ar...Read More
HealthTap member
Thank you, your answer was very helpful! Thank you! I was referencing pain that does move around her body, I will definitely schedule and appointment.
HealthTap member
Is there anything I should do or is time the only thing that heals this? I cracked the back of my skull, released from the icu without info.

Education & Training

Medical/Graduate school

Johns Hopkins University School of Medicine
Graduated 1987MD

Medical/Graduate school

Johns Hopkins University School of Medicine
Graduated 1987MD

Residency

University of California San Diego Medical Center

Residency

University of California San Diego Medical Center

Awards

Top Doctors, Portland Monthly Magazine
Thought Leader, Second Place, Portland, OR - Winter
2013
Top Neurosurgeon , Second Place, National - Winter
2013

Affiliations

American College of Surgeons
American Association of Neurological Surgeons / Congress of Neurological Surgeons, Cerebrovascular Section
Society of Critical Care Medicine
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