When can a tumor be non-cellular or non-neoplastic? And how can some neoplasms be cell free?

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So basically, I've got a bio midterm tomorrow, and so in the process of studying, I realized I completely don't get that! Even my bio friends are like, what....? So if ANYONE can help us out here, that would be fantastic! Thanks!
The word tumor is defined (in Answers.com) as "An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm." So your teacher is playing with semantics here.

The only way a "mass" could be non-cellular would be if it were cystic - - a contained area of fluid. We see this with some ovarian tumors which may be benign or malignant. The benign ones are ovarian serous cystadenomas or mucinous cystadenomas which can be quite large tumor masses. These do contain cells however in the membranous sacs surrounding the fluid
http://www.mypacs.net/cases/MUCINOUS-CYSTADENOMA-OVARY-857115.html  (+ info)

Has anyone heard of Extragonadal Germ Cell Cancer?

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Do you know anyone with it? I know it is rare but my sisters our throwing a benefit for a young adult with cancer and are donating the proceeds to them in our brothers honor. Feel free to contact me if you have any thoughts. Thanks!
http://www.emedicine.com/med/topic759.htm

This says it better than I can, or at least more succinctly.

God bless best wishes  (+ info)

how long can someone live with germ cell cancer?

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my mom has gern cell cancer and i wanna know how long she can live with it
if its malignant and spread.. not very much, (( even if goes to chemo maybe less than year ))

but if it malignant but still ddnt spread .. there is both chances of dying soon or living for a considerable time  (+ info)

When a germ enters the cell, the lymph system reacts by having specilized white blood cells poduce what?

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The lymph system provides nourishment for cells, removes poisons and destroyed bacteria.
Some answer choices. phagocytes, antibodies, antigens, liquids?
antibodies  (+ info)

What is stage 3A germ cell cancer in males?

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Are you asking us to guess the primary site?
Obviously if we guess that everything else is a guess too.

It is probably testicular cancer. Stage 3A means he has nonregional lymph node involvement or pulmonary mets.  (+ info)

extragonadal germ cell tumor?

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My brother was diagnosed with extragonadal germ cell tumor, can anyone explain to me what causes this and what can happen to him? will he die?
95% of all testicular tumors are germ cell tumors. That is, the tumors originate in the sperm forming cells in the testicles (the males gonads) or egg producing cells in the ovary (female gonads). Occasionally, however, germ cell tumors develop elsewhere in the body without any evidence of cancer in the testes. When this happens they are referred to as Extragonadal Germ Cell Tumors (meaning outside of the gonads).

During embryonic development (when you are but a clump of cells), germ cells are first seen outside of the embryo in the yolk sac. At about 4 to 6 weeks of development, these cells migrate into the embryo where they populate the developing testes or ovaries. If these cells miss their destination, they are likely to come to rest in one of a number of midline sites in the body. Extragonadal tumors arise when these cells become cancerous. In some cases, however, an apparent extragonadal tumor turns out to be a metastatic testicular tumor where the primary tumor has "burnt out" or died on its own.

Extragonadal germ cell tumors can take on a variety of tumor types. They can be either benign (teratoma) or malignant. Malignant tumors can be either seminoma [aka germinoma in females] or nonseminoma (embryonal carcinoma, immature teratoma, endodermal sinus tumor [aka yolk sac tumor], choriocarcinoma, and mixed germ cell tumors). Although much more common in males, extragonadal tumors can also occur in females.

The great majority (80%) of these tumors are benign and are handled with surgery alone. Most of the benign tumors occur in children. While benign tumors occur with equal frequency in men and women, malignant extragonadal tumors are much more common in males (9:1). Understand this, though: extragonadal germ cell tumors are rare, accounting for only 1 to 4% of all germ cell tumors.

This type of cancer is aggressive and is usually seen in young adults. Patients with mediastinal nonseminomatous EGC are typically classed as poor risk patients because these cancers often have unusual biological features that diminish cure rates and add additional complexities to treatment. Despite these unusual characteristics, about half of even these patients are cured. Other extragonadal sites do not share these same adverse biological features and are usually classified with an intermediate prognosis. For all extragonadal seminomas, the outlook is identical to metastatic testicular seminomas with the same high prospect of cure.  (+ info)

Germ Cell Cancer on spine, liver, ribs...?

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I got a text message from a friend that said
"She has germcell cancer. It's on her spine, liver, ribs, sternum, femur, and stomach. She starts chemo on Monday for six months. One week of chemo and two weeks off."

How bad is this? Cancer is always bad when it travels to the organs like that, but is germ cell cancer particularly bad?
I tried googling it, but couldn't get a lot of information.
  (+ info)

Can anyone help me with Ideas on an ornament made from biological themes like Germ Warfare,Sickle cell Anemia.?

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I have a College course that is requiring a christmas ornament made of a biological theme.....I would like to do Sickle cell anemia but having issues on what I could do......but willing to hear all Ideas
well ... you could make an ornament in the shape of a sickle cell anemia RBC... it would go perfectly with the Christmas theme being red and all.  (+ info)

What is the first thing in your body to see a invading germ?

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Is a white blood cell the first thing in the body that spots a invading germ? If not, what is it?
http://www.youtube.com/watch?v=Uavteh1nCt0 This animation tells you that its ANY cell that signals that its an invading germ.  (+ info)

Can microwave radiation from cell tower cause cancer ?

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One of my friend is an electrical engineer who is working for a mobile phone company for the last 3 years. His job requires him to service BTS cell towers while they are running. Recently he found out that he has seminoma ( a germ cell tumor of the testis), which is in malignant stage. We were astonished because he is only 27 and its not normal for this age. So we were wondering whether it is due to massive microwave radiation from cell phone tower. For your information my friend is a smoker too.
Actually, seminomas are very common for someone of this age. The typical age of diagnosis is 15-35 years.

http://emedicine.medscape.com/article/437966-overview

He's right in the middle of that age range. There are some websites which say median age is 40. Perez and Brady's principles and practice of radiation oncology (a common reference used by most doctors in radiation therapy for cancer) lists the age in the low to mid 30s as median. Keep in mind that median means MIDDLE. So there are many who are younger and many who are older, and this is normal.

Fortunately, these types of cancers have a very good prognosis. The smoking probably didn't have much to do with it, but people who have already had one type of cancer are more at risk for others later in life, so maybe he should keep that in mind.

I doubt it had anything to do with the cell phone tower - as this is a pretty typical age to get this cancer. It still sucks for him, and I hope everything turns out ok. But, keep in mind, that there is no scientific biological mechanism known by which microwave radiation can cause cacner. That doesn't mean that there is no way that it could, just that there has never been a proven link, and there is no way that anyone can discover that it would even lead to cancer.  (+ info)

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