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Noninvasive MRI Technique Accurately Predicts Mutations in Human Brain Tumors

By MedImaging International staff writers
Posted on 18 May 2009
Investigators were able to accurately predict the specific genetic mutation that caused brain cancer in a group of patients studied utilizing magnetic resonance imaging (MRI).

"The field of cancer research has evolved to the point where the identification of the mutations that cause tumors has changed how we treat patients in a number of cancers,” said Donald O'Rourke, M.D., associate professor of neurosurgery at the University of Pennsylvania School of Medicine (Penn; Philadelphia, USA). "Potentially, we believe we have a method that uses MRI to identify a tumor mutation. Historically, tumor mutations have been identified in only one way: take the tissue out and examine it using one of two laboratory tests to see if the mutation is present. In this study we've done this identification noninvasively. To my knowledge this is the first demonstration that an MRI, or any imaging technique, can accurately predict the type of mutation of a human tumor.”

A particular MRI technique, called relative cerebral blood volume, measures blood flow to the tumor, which very highly correlates with the presence of an important mutation in glioblastoma, a type of brain cancer. The mutation occurs in the epidermal growth factor receptor (EGFR), a well known cancer-related protein that helps tumors form their necessary blood vessels. EGFRvIII, the specific mutation the Penn group studied, is the hallmark of a more aggressive form of glioblastoma.

The researchers compared MRI readings to tumor tissue samples from 97 glioblastoma patients. They discovered that patients with higher relative cerebral blood volume as measured by MRI correlates with the EGFRvIII mutation compared to those who did not have the mutation.

Glioblastoma is a variable disease, and clinicians need help to distinguish one form from another. "All of cancer research is evolving to a point where mutations can facilitate care, so a more accurate diagnosis and treatment course can be better planned by identifying the mutational status of the tumor,” remarked Dr. O'Rourke.

EGFRvIII is an area of intense interest in the field of cancer, because it is linked to more aggressive cancers. Having a noninvasive way to identity patients with the EGFRvIII mutation could allow physicians to enroll these patients into trials using drugs that specifically target this mutation. Penn is part of a multicenter trial that is doing just that.

Another implication of having a noninvasive method to track a specific patient group is for following treatment response. "Currently we identify a tumor mutation by removing a tumor, and then we select a particular treatment and evaluate the response with an MRI to see if the tumor is stable or smaller,” explained O'Rourke. "With this new method we'll be able to show whether a surrogate of the mutation is changing. EGFRvIII correlates with the elevated blood flow to the tumor and if we put a patient on an effective anti-tumor strategy, that blood flow should reduce. We'd be getting a more biological readout to therapy.”

Ongoing research is focusing on utilizing advanced MRI to characterize additional mutations in glioblastoma tumors. The researchers presented their findings the week of April 20, 2009, at the American Association for Cancer Research (AACR) 100th annual meeting.

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University of Pennsylvania School of Medicine




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93 (33.855438232422): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (43.869018554688): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (33.855438232422): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (34.809112548828): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (162.12463378906): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
105 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
106 (68.187713623047): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294723240 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (61.03515625): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294723240 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
109 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
110 (64.13459777832): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294723240 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (633.00132751465): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294723240 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (617.02728271484): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
113 (387.90702819824): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
114 (111.81831359863): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
115 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
116 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
117 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
118 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
119 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
120 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
121 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
122 (317.09671020508): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 20880.937576294): SELECT * FROM jos_deeppockets WHERE jos_deeppockets.cat = 10 AND jos_deeppockets.type = 'deeppockets_item' AND jos_deeppockets.published = 1 AND jos_deeppockets.created + INTERVAL 14 DAY >= NOW() ORDER BY jos_deeppockets.hits DESC LIMIT 7
124 (500.91743469238): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294723240 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294723240 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 8301.9733428955): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
126 (84.877014160156): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
127 (38.14697265625): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
128 (29.087066650391): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
129 (52.928924560547): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
130 (40.054321289062): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
131 (368.11828613281): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
132 (66.041946411133): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
133 (47.922134399414): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
134 (35.04753112793): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
135 (549.0779876709): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (404.83474731445): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (42.915344238281): SELECT name FROM jos_deeppockets WHERE id=212
138 (32.186508178711): SELECT name FROM jos_deeppockets WHERE id=212
139 (702.85797119141): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (664.94941711426): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
142 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
143 (!!!!! 10895.967483521): TRUNCATE TABLE jos_trademed_module
144 (135.89859008789): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294723240 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (81.062316894531): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294723240 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (489.95018005371): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
149 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
150 (!!!!! 1356.1248779297): SELECT jos_item.* FROM jos_item INNER JOIN jos_number ON jos_item.numberID=jos_number.id WHERE 1=1 AND (jos_item.imgMini<>'') AND jos_item.type='L' AND jos_item.numberID= ( SELECT jos_number.id FROM jos_number WHERE jos_number.journalID IN (10) and jos_number.id in (select distinct jos_number.id from jos_number join jos_item on jos_item.numberid=jos_number.id where jos_item.type='P') ORDER BY (CONVERT(SUBSTRING(issue,1,2),SIGNED) + (CONVERT(SUBSTRING(issue,3,2),SIGNED)*100)) DESC LIMIT 0,1 ) ORDER BY RAND() DESC LIMIT 6
151 (84.161758422852): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
152 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
153 (57.93571472168): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294723240 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294723240 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (39.815902709961): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=212 or channel_id is null)
155 (35.04753112793): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=212 or channel_id is null)
156 (48.87580871582): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (73.909759521484): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
158 (49.114227294922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723240 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723240 AND published='1' LIMIT 1
159 (39.815902709961): select jos_twitters.link from jos_twitters where cat=10
160 (28.848648071289): select jos_facebook.link from jos_facebook where cat=10
161 (29.087066650391): select jos_google_plus.link from jos_google_plus where cat=10
162 (29.087066650391): select jos_linkedin.link from jos_linkedin where cat=10
163 (348.09112548828): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1208.0669403076): insert into jos_banners_delta values (14615,'2025-06-29 11:11:58','216.73.216.249','view'),(14202,'2025-06-29 11:11:58','216.73.216.249','view'),(14203,'2025-06-29 11:11:58','216.73.216.249','view')