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Apophallation is the biting off of the penis, known to occur in terrestrial slugs, which are hermaphroditic gastropod mollusks. It has been reported in some species of banana slugs, Ariolimax, and in the distantly related Deroceras laeve. [1] [2] In the mating of banana slugs, the penis is inserted into the body of the partner.
Mast cell tumor on lip of a dog. Veterinary oncology is a subspecialty of veterinary medicine that deals with cancer diagnosis and treatment in animals. Cancer is a major cause of death in pet animals. In one study, 45% of the dogs that reached 10 years of age or older died of cancer. [1]
In the case where one penis is chewed off, this is usually done by the other slug. A replacement penis does not grow back. Apophallation is most widely found in Ariolimax species, [1] which have internal sperm exchange. In these slugs, apophallation is only an occasional occurrence which follows a period of struggle and pulling by the owner.
No cure for cancer in canines exist. [2] Some dog owners opt for no treatment of the cancer at all, in which case palliative care, including pain relief, may be offered. Regardless of how treatment proceeds following a diagnosis, the quality of life of the pet is an important consideration.
The TK canine cancer panel is an indicator of general neoplastic disease. [17] The stage of the disease is important to treatment and prognosis. Certain blood tests have also been shown to be prognostic. The stage of the disease is important to treatment and prognosis. Stage I – only one lymph node or lymphoid tissue in one organ involved.
Banana slugs are hermaphroditic, meaning they are both male and female at the same time. [3] During reproduction, Ariolimax buttoni engages in apophallation - the behavior in which a slug chews off its mating partner's penis. [5] Their mating season is very long, lasting from February to early September. In addition, the copulation itself is long.
A hypothesis suggests these slugs may be able to compensate the loss of the male function by directing energy that would have been put towards it to the female function. [33] In the grey slug , the sharing of cost leads to a spectacular display, where the mates suspend themselves high above the ground from a slime thread, ensuring none of them ...
Hemangiosarcoma is a rapidly growing, highly invasive variety of cancer that occurs almost exclusively in dogs, and only rarely in cats, horses, mice, [1] or humans (vinyl chloride toxicity). It is a sarcoma arising from the lining of blood vessels; that is, blood-filled channels and spaces are commonly observed microscopically.