It's been nearly three months since we had a new episode of "House" in the house, and his return sparked a debate among the Yahoo! TV team about all of the strange ailments we've seen on our favorite TV shows. Are these diseases fact or entirely fiction? Click through this slideshow to see how our top 10 most memorable TV diagnoses fared under the microscope. You might be surprised.Monday, April, 28, 2008, 11:28 PM

LL Cool J guest starred as a death row inmate who "House" managed to get transferred to the hospital (by breaking every rule) when his racing heart rate wasn't able to pump blood properly. The inmate presented symptoms similar to drug use, but House knew better. House started digging into the criminal's past and questioned him on his lack of motives for his most recent murder charge. This led House to a final diagnosis of Pheochromocytoma, a neuroendocrine tumor that affects the adrenal glands and causes random bursts of adrenaline. In this particular patient, the tumor caused sudden fits of unexplainable rage that resulted in murder. Y! TV DIAGNOSIS: FactFOX/Jamie Trueblood - Monday, April, 28, 2008, 11:28 PM

During the episode "My Favorite Mistake" on "Grey's Anatomy," we were introduced to Mrs. Rogerson who suffered from Fibrodysplasia ossificans progressiva (FOP) which turns body tissue (muscle, ligament, etc.) into bone. FOP is a rare gene mutation that causes tissue to ossify instead of just bruise (for example), essentially locking its victims in a hardened shell. Mrs. Rogerson was frozen from her disease and only able to move her eyes and lips when she was admitted to Seattle Grace for internal bleeding. She ultimately didn't survive the surgery to stop the bleeding, but had already revealed to Izzie that she was ready to die. There are 2,500 known cases of FOP in the world. Y! TV DIAGNOSIS: FactABC/Gale Adler - Monday, April, 28, 2008, 11:28 PM

Because many symptoms can be the result of Lupus, "House" rejects all Lupus diagnoses, saying "it's never Lupus" -- even stashing his Vicodin in a Lupus-related book, figuring nobody would ever crack it open. But in the fall of '07 the writers pulled a wildcard from their sleeves in "You Don't Want to Know" and presented House with a magician (tah-dah) who actually had Lupus, reminding us that "it's never Lupus... except when it is." Lupus is a tricky autoimmune disease that can manifest itself in several curious ways. Y! TV DIAGNOSIS: FactFOX/Adam Taylor/NBC Universal - Monday, April, 28, 2008, 11:28 PM

In "My Musical," the five-time Emmy-nominated musical episode of "Scrubs," Patti Miller (guest star Stephanie D'Abruzzo of "Avenue Q" fame) arrived at Sacred Heart Hospital after she abruptly fell unconscious at the park. When she returned to consciousness, she started hearing everyone's speech as singing. Her CT scan showed a gigantic aneurysm in her temporal lobe. A brain aneurysm is an abnormal bulging of one of the arteries in the brain. It is estimated that up to one in 15 people in the United States will develop a brain aneurysm during their lifetime, women are more likely to have them, and symptoms depend on where the aneurysm is located. The most common symptom associated with a brain aneurysm is a headache, and the only document we found that listed hallucinations associated them with the occipital lobe. Y! TV DIAGNOSIS: Mostly fiction (Sorry, Eli Stone)NBC/Chris Haston - Monday, April, 28, 2008, 11:28 PM

We're pretty sure the episode "Lines in the Sand" caused mothers everywhere to cluck, "I told you so." When a little boy with autism started drawing lines on a chalk board and screaming uncontrollably, his parents rushed him to the hospital. Luckily for them, "House" took the case seriously and eventually made the grossest discovery. With the help of a flashlight directed into the boy's eye, House saw tiny worms squiggling around on the eyeball. Apparently the boy ate sand from his sandbox that contained fecal matter from an animal with a bad case of worms, which resulted in worms swimming around in the boy's lungs, liver and, of course, eyes. Thankfully, worms are treatable. Y! TV DIAGNOSIS: FactFOX/Michael Becker - Monday, April, 28, 2008, 11:28 PM

In "Finding Judas" a young girl was severely inflicted with divorced parents -- that and severe physical pain, a mounting fever and a rash. "House" deduced that she had a flesh-eating bacteria. But before he could have her limbs surgically removed to prevent it from spreading, Chase popped in with an alternate diagnosis that resulted in a not-so-pretty beatdown. Chase insisted that the little girl had Erythropoietic Protoporphyria, a genetic disease that results in a burning sensation when skin is exposed to a light source, and that’s what was causing the fever and rash. Score one for Chase. Y! TV DIAGNOSIS: FactFOX/Isabella Vosmikova - Monday, April, 28, 2008, 11:28 PM

There must've been a full moon in Los Angeles when four little blue girls came to the Oceanside Wellness Clinic of "Private Practice." The girls were not blue as in sad, but they were literally, actually, really, totally the color blue! Cooper couldn't figure out what caused the girls' skin to turn blue until he played with them. The girls took him to their "magic castle," which is a shed in the neighboring yard filled with Ammonium Nitrate from bags of fertilizer. The little girls were inadvertently inhaling the toxic fumes from the fertilizer which in turn caused them to become sick and turn blue. While Ammonium Nitrate can cause blue tinting, according to our research you have to actually ingest it for that result. Y! TV DIAGNOSIS: Fact with slight case of fictionABC/Richard Cartwright - Monday, April, 28, 2008, 11:28 PM

Academy Award nominee Abigail Breslin guest starred in the "Grey's Anatomy" episode called "Sometimes a Fantasy," where she played a girl who claimed to be a superhero who can't feel pain, and proved it by beating Alex at an ice-water pain test. When she says that she got another child to hit her in the stomach with a baseball bat, Alex is concerned, and an MRI scan confirms she has a large amount of internal bleeding. The girl's lack of physical pain is diagnosed as congenital insensitivity to pain. This is a rare chromosomal condition that usually bears no detectable physical abnormality. People who suffer from it can still feel discriminative touch and their cognition and sensation is otherwise normal. Y! TV DIAGNOSIS: FactABC/Karen Neal - Monday, April, 28, 2008, 11:28 PM

In "Merry Little Christmas," "House" met a girl with dwarfism whose lungs mysteriously collapsed. When an X-Ray of her legs showed normal bone growth, they discovered she wasn’t a dwarf and House realized the girl had Langerhans Cell Histiocytosis (LCH), which is a rare disease that affects children and can cause problems in the lungs, liver and kidneys (among other things). In this particular case the LCH affected the girl’s pituitary gland (responsible for regulating human growth hormone), which stunted her growth. Y! TV DIAGNOSIS: FactFOX/Paul Drinkwater/NBC Universal - Monday, April, 28, 2008, 11:28 PM

Many of the most memorable TV maladies have been related to various malfunctions of "private parts," but the woman George and Izzie treated in an episode titled "Yesterday" still has us talking. After a woman in a car accident was rushed to the hospital, witnesses reported that she was screaming and shuddering as if she were having a seizure. Was it epilepsy? Before the woman could respond, she had another one of her "episodes" -- which turned out to be persistent spontaneous orgasms. This is a real but rare problem that can also be a side effect to medication (SSRIs). Y! TV DIAGNOSIS: FactABC/Scott Garfield - Monday, April, 28, 2008, 11:28 PM