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On January 22nd I had a major operation. They opened a 13 centimer section of my spinal cord and removed a tumour. The doctors say they have never, in thousands of operations, ever seen a tumour like it.
It looks like a salamander and has clearly defined eyes and a tail. I took a picture of it with my cell phone camera.
Fetus in fetu (or fœtus in fœtu) is a developmental abnormality: a mass of tissue inside the body that more or less resembles a fetus. There are two theories of origin concerning fetus in fetu. One theory is that the mass begins as a normal fetus but becomes enveloped inside its twin. The other theory is that the mass is a highly developed teratoma. Fetus in fetu is estimated to occur in 1 in 500,000 live births.
A fetus in fetu can be considered alive, but only in the sense that its component tissues have not yet died or been eliminated. Thus, the life of a fetus in fetu is inherently limited to that of an invasive tumor. In principle, its cells must have some degree of normal metabolic activity to have remained viable. However, without the gestational conditions in utero with the amnion and placenta, a fetus in fetu can develop into, at best, an especially well-differentiated teratoma; or, at worst, a high-grade metastatic teratocarcinoma.
In terms of physical maturation, its organs have a working blood supply from the host, but all cases of fetus in fetu present critical defects, such as no functional brain, heart, lungs, gastrointestinal tract, or urinary tract. Accordingly, while a fetus in fetu can share select morphological features with a normal fetus, it has no prospect of any life outside of the host twin. Moreover, it poses clear threats to the life of the host twin on whom its own life depends.
A teratoma is a kind of tumor (neoplasm). Definitive diagnosis of a teratoma is based on its histology: a teratoma is a tumor with tissue or organ components resembling normal derivatives of all three germ layers. There are rare occasions when not all three germ layers are identifiable.
The tissues of a teratoma, although normal in themselves, may be quite different from surrounding tissues, and may be highly inappropriate, even grotesque: teratomas have been reported to contain hair, teeth, bone and very rarely more complex organs such as eyeball, torso, and hands, feet, or other limbs. Usually, however, a teratoma will contain no organs but rather one or more tissues normally found in organs such as the brain, thyroid, liver, and lung.
A teratoma is an encapsulated tumor. Sometimes the capsule encompasses one or more fluid-filled cysts and when a large cyst occurs there is a potential for the teratoma to produce a structure within the cyst that resembles a fetus.
Originally posted by aNdReSk
i think i probably have one of those in my stomach cuz i never get fat regardless of what i eat lol