A much better episode of House this week. While it wasn’t quite up to the standards of the first two seasons, there were definite that classic House was trying to break through.

Sarah is a 29 year old teacher of special needs children who suddenly begins to cough up blood during class and then collapses. She is admitted to the hospital under House’s care. The team’s initial differential diagnosis includes ulcer, leukemia, von Willebrand’s disease (a blood clotting disorder), or a thoracic tumor. House agrees with Foreman that the problem is likely within the patient’s blood and orders a bleeding time test. The test is abnormal, showing that her blood is not clotting correcting. A check of her clotting factors is normal, but her platelets turn up abnormal. The differential diagnosis now includes lymphoma and ITP (idiopathic thrombocytopenic purpura), with the latter being more likely. House elects to start her on methotrexate (which really isn’t a recommended treatment for ITP), but he also wants to treat her with total body irradiation (which is also not a recommended treatment for ITP, only it can have even nastier side effects than methrotrexate). In actuality, House has no intention of using the radiation but is just trying to test Cameron’s limits. She calls his bluff and allows the procedure, so now House and his team pretend have to pretend to use it. In the meantime, the methotrexate has shown no benefit, so House doubles the dose and adds Prednisone (a steroid, and the actual recommended treatment for treating ITP). During the (fake) radiation treatment, Sarah mentions that she has to pee. When she tries to get off the table, she collapses and is found to be pulseless. Thirteen and Taub rapidly pull out the defibrillator and shock her back into a normal rhythm.
The team meets again to discuss the latest findings. Tests, including a transthoracic echocardigram and a bubble test, show no structural defects of Sarah’s heart. Thirteen suggests a high vagal tone from urinating may have caused her to develop an arrhythmia and collapse. The rest of the team half-heartedly suggest heavy metal poisoning, toxin exposure, drug use, or alcohol use. Thirteen then mentions cold agglutinin disease, which seem to fit the case. House wants to put Sarah in an ice bath to test the diagnosis, but Cameron wants him to test some of the blood first. Reluctantly House agrees. The blood clots when exposed to the cold, confirming the presence of cold agglutinins, so Sarah is put into a three minute ice bath. The test, though uncomfortable, is normal (so while she may have some cold agglutinins — and most people do at various levels — she doesn’t have the disease; but please note this is not the recommended way to diagnose the condition).
House now decides that Sarah’s offhand story of transposing the digits of her room number, combined with her need to urinate during the radiation treatment, are signs of a brain lesion — a left hippocampal lesion to be precise. He thinks it is most likely multiple sclerosis (MS), and wants to perform a brain biopsy to confirm his diagnosis. Kutner thinks she has a pancreatic tumor and wants to perform an ERCP instead, but House wins — sort of. Cameron won’t let him go through with a brain biopsy, wanting an MRI first. Reluctantly, House orders the MRI, but it is normal, so Sarah doesn’t have MS. Kutner performs his ERCP and it is normal, but Sarah starts to have problems breathing during the test. She is found to have pleural effusions (fluid build up around the lungs), which are drained (off camera). House now decides that Sarah has equine encephalitis, a mosquito-borne disease caused by a picornavirus (there are actually several types of equine encephalitis, but none that I can find are caused by a picornavirus), which is causing conduction problems in her brain. He wants to test nerve conduction tests along the surface of her brain. This, of course, requires removing the top of her skull and thus needs approval from Cameron. She declines. Meanwhile, Kutner now thinks that she has a lymphoma of her spleen and wants to perform a splenectomy (surgically remove the spleen). House has Thirteen and Foreman search the classroom for evidence of encephalitis, but they turn up nothing significant. Nevertheless, Cameron allows him to perform the nerve conduction study and even assists. The test is going smoothly until Kutner tattles by calling Cuddy. She demands to speak with House and is placed on speakerphone. In the background, her baby Rachel is crying, and the sound is annoying Sarah quite a bit. Her reaction is paradoxical, though, in that her blood pressure drops while she is annoyed (it should rise). The team ends the test and puts her skull back together. House is puzzled and cannot figure out what is going on with Sarah. Puzzled, that is, until Cuddy and Rachel stop by. The baby spits up on House which leads him to start a monologue about evolution which leads him to have his Eureka! moment and diagnose Sarah with a PDA (patent ductus arteriosus).
This one requires a little explanation and hand-waving: During the fetal period, the baby doesn’t need to breathe — no air around, after all — and so the fluid-filled lungs are short circuited by the ductus arteriosus which allows the baby’s blood flow to bypass the lungs. Normally, it closes shortly after birth, but in Sarah’s case, it remained open. After birth, the pressure differentials shift, and the ductus arteriosus now shunts some oxygenated blood away from the arterial circulation and into the venous circulation. If I understand what House is implying, Sarah’s PDA isn’t open all the time, but just under periods of stress, which causes her systemic blood pressure to rise. During these periods, enough oxygenated blood is lost so that the brain doesn’t get as much as it needs (but apparently this affects just the left side of Sarah’s brain) and this is what causes the dropping blood pressure in her brain and her neurological symptoms. The shift in pulmonary blood flow led to her lung symptoms. The abnormal turbulence from this can tear up platelets, so this is most likely what led to her abnormal platelets and bleeding problems. A stretch certainly, but no worse than many other House diagnoses.
As usual, major complaints are in red, minor in blue, nit-picking in green:
Even though the PDA may not have been open when the heart was scanned, the fact that the duct still existed (it should have withered away) should have been evident.
Why would only the left part of her brain been affected?
Apparently no one in the hospital likes to run CT scans or MRIs (this week anyway). Most of the diagnoses mentioned (MS, lymphoma, tumor) would have shown up and not required brain biopsy, ERCP, etc.
A blood test for cold agglutinins is not simply a “cool the blood and see if it clots” test, but a test to see how much it clots.
An ice bath is by no stretch of the imagination a good test for cold agglutinin disease, if they have it, you’ve just done the patient a major disservice as systemic clotting is not a good thing.
ITP, by definition, has low platelet numbers — which were never mentioned, just abnormal looking platelets (though her red blood cells should have looked chewed up as well).
MTX is not a treatment for ITP. It has been investigated, and continues to be investigated, but hasn’t shown a lot of promise. IV steroids are first line.
There seems to be confusion among the team about heart attacks (myocardial infarctions) and cardiac arrest. The terms are not synonymous.
Shocking a pulseless patient? How about — at least — some CPR first, if not checking the rhythm before shocking?
If I were the doctors I would have taken a closer look at the vitals during the test. Her resting oxygen saturation was 97% — on oxygen. That’s not normal. Nor is a heart rate of 116 , even though they called it “normal”. It didn’t change at all during her ice bath, when it should have shot up. Sure, I know the fancy vital sign machine was just there as a prop, but at least put in a little effort to make it authentic, prop people.
It would have been nice if they had run labs on the fluid they pulled out of the effusion. It would have helped to rule out cancer and pancreatic disease at least.
On another note, parent/baby bonding is often delayed in adoption situations and post-adoption depression in common, so what Cuddy was feeling was fairly normal. I’m glad to see she did not give up Rachel because of it.
The medical mystery started out weak (coughing up blood? That’s it?), but got better earns a B. The final solution was a stretch, but at least it fits more symptoms and seems more logical than usual and thus deserves a B+. The medicine had too much jumping from diagnosis to diagnosis while overlooking the most common and useful testing, so can’t really be considered anything more than average: C. The soap opera was subdued this week, but that felt appropriate, and earns a B.
Last week’s House review
A list of all prior House reviews
This week’s House Challenge results have been posted.