Biopsy

biopsy
The process of removing tissue to examine it, usually for medical reasons.
stoma ...

Biopsy: The removal and examination of a sample of tissue from a living body for diagnostic purposes.

Needle Biopsy - The removal of tissue or fluid with a needle for examination under a microscope. Also called a fine-needle aspiration.
Nematode - Any of many intestinal roundworms.

Biopsy
A liver biopsy may be needed to obtain a definitive diagnosis. A biopsy is commonly done in conjunction with an ultrasound to determine which part of the liver should be biopsied.

Biopsy samples of the colon are not routinely taken by laparotomy (surgically entry into the abdomen through the abdominal wall), because of the increased risk of bacterial contamination and infection associated with that procedure.
Source: PetWave ...

Biopsy: The way to definitively diagnose hepatic lipidosis is through a liver biopsy or fine needle aspirate.
Is this a treatable disease?

A biopsy is a surgical procedure in which a tissue sample is removed from the body and examined under a microscope. In some cases, only a small sample is removed for analysis.

Endoscopy/Biopsy
This diagnostic procedure is more complicated and expensive than those listed above and would be used only in special circumstances.

These sequelae can occur very quickly. There is nothing that can be done in this stage. And surgery is required for intestion obstructions, as endoscopy in cats is only capable of biopsy in cats stomach.

See also: Veterinarian, Cancer, Bacteria, Inflammation, Parasite