Et Tumor, Brute?

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Et Tumor, Brute? is a side quest in Fallout: New Vegas.

Quick walkthrough

  • Find a way to cure Caesar's brain tumor.
  • To perform surgery using the Auto-Doc in Caesar's tent, it must first be repaired using a diagnostic scanning module. This can be found in Vault 34 only after the quest begins, otherwise the Auto-Doc there indicates there is a salvageable part, but gives no salvage option.
  • Alternatively, a Medicine skill of 75 or a Luck of 9 can be used. This option will also require the use of a doctor's bag, and surgical tools bought from the New Vegas Medical Clinic, or you could steal it from the first aid box in the room left of the counter.
  • In order to use the Luck option, Speech skill of 65 is also required. Otherwise, Caesar is not convinced and he will not allow you to operate on him. Surgical tools will not appear in New Vegas Medical Clinic and you will be forced to retrieve the part in Vault 34.
  • With either of the above methods, you have the option to kill Caesar during the procedure. To remain on good terms with Caesar's Legion after his death, you must pass a skill check (Speech 50, Medicine 50, or a high Legion reputation) when speaking to Lucius.
  • If Arcade Gannon is an active follower, you have the option to sell him into slavery as Caesar's personal doctor (Karma loss), thereby completing the quest. To do so, have him wait outside Caesar's tent. Talk to Lucius inside.

Detailed walkthrough

If you choose to find the diagnostic scanning module, you must go to the radiation and ghoul infested Vault 34. You can find the vault north-northwest of the NCR's Camp Golf or east of the NCR's Sharecropper Farms near New Vegas. It is recommended that you bring a good supply of RadAway and Rad-X. There will be golden geckos on the way in as well as the ghouls inside.

Simply go to the room marked 'Clinic'.

  • As you walk in take your first right to the stairway that will take you to the 'cafeteria'.
  • Drop down the hole, exit the room and turn left.
  • Follow the corridor (and signs for the 'clinic'), until you see the room marked 'Clinic'.
  • You need to go into one of the submerged rooms and search one of the dead vault technicians for the 'Vault 34 Security Terminal Password'.
  • You will need to find a security terminal and go to the option 'System' and then 'Activate Pump Station'.
  • Go through the Clinic and follow the corridor until you reach a door that was previously closed on the right side of the hallway leading to the 'Armory'.
  • Once in the door make the first right and enter the 'Security Station'.
  • Once in there, take a right, and try to sneak if you can. (You may need more Rad-X and RadAway), as there is a lot more radiation down here.


  • Attempting the surgery without the required Medicine 75 or Luck 9 will result in Caesar's death. You must then have either Medicine 50 or Speech 50 to explain to Lucius that Caesar's age was a complication in the procedure, or he will become hostile (unless your reputation with the Legion is "Liked" or higher).
  • In all versions of the game, the broken Auto-doc is in the clinic in Vault 34, not Security Station A.
  • You will not be able to offer Arcade as a slave if you recruited him after you have spoken to Caesar in private.

Behind the scenes

  • The title of this quest is a play on Julius Caesar's famous last words,"Et tu, Brute?", from Shakespeare's play Julius Caesar which translates to "And you, Brutus?", showing Caesar's dismay in seeing Brutus taking part in his assassination.
  • The quest is an elaborate allusion to Julius Caesar, who did indeed suffer from an ailment that caused severe headaches and was also a secret from the public. Caesar's headaches were more likely to have been caused by a motor function disorder, causing him to fall regularly ("falling sickness").
  • If after Arcade is given as a slave the player speaks to him and says "The world needs Caesar more than it needs you" Arcade will respond "Victrix causa diis placuit sed victa Catoni" which can be translated as "the victorious cause pleased the gods, but the conquered cause pleased Cato." This is a quote from the Latin poem Pharsalia by Lucan, in which the historical figure of Caesar is portrayed as the main antagonist, and the main hero, the historical figure of Cato Uticensis, is eventually forced to commit suicide, being unable to defeat Caesar.
Main quests
Act 1Ain't That a Kick in the Head · Back in the Saddle · By a Campfire on the Trail · They Went That-a-Way · Ring-a-Ding-Ding!
Act 2Wild Card (Wild Card: Ace in the Hole, Change in Management, You and What Army?, Side Bets, Finishing Touches) · The House Always Wins (I, II, III, IV, V, VI, VII, VIII) · Render Unto Caesar · Et Tumor, Brute? · Things That Go Boom · Kings' Gambit · For the Republic, Part 2 · You'll Know It When It Happens/Arizona Killer
Act 3No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!
Side quests
New California RepublicAnywhere I Wander · Back in Your Own Backyard · Bitter Springs Infirmary Blues · Boulder City Showdown · Can You Find it in Your Heart? · Climb Ev'ry Mountain · Don't Tread on the Bear! · Emergency Radio · Eye for an Eye · Flags of Our Foul-Ups · Hard Luck Blues · I Don't Hurt Anymore · I Put a Spell on You · Keep Your Eyes on the Prize · Medical Mystery · No, Not Much · Pressing Matters · Restoring Hope · Return to Sender · That Lucky Old Sun · The White Wash · There Stands the Grass · Three-Card Bounty · We Will All Go Together · You Can Depend on Me
Caesar's LegionBeware the Wrath of Caesar! · Caesar's Favor · Caesar's Foe · Caesar's Hire · Cold, Cold Heart · I Hear You Knocking · The Finger of Suspicion · We Are Legion
The StripBeyond the Beef · Bye Bye Love · Classic Inspiration · How Little We Know · Pheeble Will · Talent Pool · The House Has Gone Bust! · The Moon Comes Over the Tower
Freeside & Outer VegasBirds of a Feather · Bleed Me Dry · Debt Collector · G.I. Blues · High Times · Someone to Watch Over Me · The Coyotes · Wang Dang Atomic Tango
BoomersAnt Misbehavin' · Sunshine Boogie · Volare! · Young Hearts
Great KhansAba Daba Honeymoon · Cry Me a River · Don't Make a Beggar of Me · Oh My Papa
Powder GangBooted · I Fought the Law · Run Goodsprings Run · Why Can't We Be Friends?
Brotherhood of SteelEyesight to the Blind · Still in the Dark · Tend to Your Business
OtherCome Fly With Me · Crazy, Crazy, Crazy · Ghost Town Gunfight · Guess Who I Saw Today · Left My Heart · My Kind of Town · The Legend of the Star and A Valuable Lesson · Unfriendly Persuasion · Wheel of Fortune
Companion questsED-E My Love · For Auld Lang Syne · Heartache by the Number · I Could Make You Care · I Forgot to Remember to Forget · Nothin' But a Hound Dog · One for My Baby
Unmarked questsA Bit of Slap and Tickle · A Final Plan for Esteban · Access Powers · All Fired Up! · An Ear to the Ground · Andy and Charlie · Arizona Scavenger · Barton the Fink · Bear Necessities · Big Winner (Atomic Wrangler, The Gomorrah, The Tops, Ultra-Luxe, Vikki & Vance) · Bounty Killer (I, II) · Brotherhood Bond (I, II) · Caching in at the Cove · Cajoling a Cudgel · Claws Mended · Claws Out · Dealing with Contreras · Defacing the Humble Stone · Democracy Inaction · Don't Poke at the Bear! · Eddie's Emissary · Exhumin' Nature · Fight Night · Flogging a Dead Corpse · Friend of the Followers · Gland for Some Home Cooking · Harder, Better, Faster, Stronger · Hat's Entertainment · Help for Halford · Hidden Valley computer virus · Highway to the Danger Zone (I, II) · Honorary Rocketeer · I Love Bananas · Iron and Stealing · Keith's Caravan Charade · Laurifer Gladiator · Lenk's Bad Debts · Lily and Leo · Long-Term Care · Malleable Mini Boomer Minds · Maud's Muggers · Meeting an Equal · Missing a Few Missiles · Most Wanted · Not Worth a Hill of Corn and Beans · Old School Ghoul · A Pair of Dead Desperados (I, II) · Papers, Please · Pistol Packing · Playing on the Old Joana · Poor Meat Never Makes Good Soup · Powder to the People · Power to the People · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · Saving (or Savaging) Sergeant Teddy · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · The Star Showdown · Strategic Nuclear Moose · Straus Calls · Strip Search · Suits You, Sarah · Tags of Our Fallen · A Team of Moronic Mercenaries · Thought for the Day · Tourist Traipse · Trudy's Radio Repair · A Trusted Aide · Useless Baubles or Fancy Trinkets? · We Must Stop Beating Like This · We Must Stop Meeting Like This · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman
Add-on quests
Dead MoneySierra Madre Grand Opening! · Find Collars (8: "Dog", 12: Christine, 14: Dean Domino) · Fires in the Sky · Strike Up the Band · Mixed Signals · Trigger the Gala Event · Put the Beast Down · Last Luxuries · Curtain Call at the Tampico · Heist of the Centuries · Big Winner, Sierra Madre
Honest HeartsA Family Affair · Arrival at Zion · Bighorners of the Eastern Virgin · Chaos in Zion · Civilized Man's Burden · Crush the White Legs · Deliverer of Sorrows  · Departing Paradise · Flight from Zion · Gathering Storms · Gone Fishin' · Happy Trails Expedition · Prisoners of War · Retake the Bridge · River Monsters · Rite of Passage · Roadside Attraction · Sanctity of the Dead · The Advance Scouts  · The Treacherous Road · The Grand Staircase · Tourist Trap
Old World BluesAll My Friends Have Off Switches · A Brain's Best Friend · Coming Out of Her Shell · Field Research · He Came... And Went · Influencing People · Midnight Science Fiction Feature! · Old World Blues · On The Same Wavelength · Picking Your Brains · Project X-13 · Sonic Emitter Upgrade · Welcome to the Big Empty · What's In A Name? · When Visitors Attack! · X-2: Strange Transmissions! · X-8 Data Retrieval Test · X-8: High School Horror! · X-13: Attack of the Infiltrator!
Lonesome RoadThe Reunion · The Silo · The Job · The Launch · The Tunnelers · The Divide · The Courier · The End · The Apocalypse

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