### condition | illness | tumor:

Ovarian tumor
* Most ovarian tumors arise from the epithelial surface of the ovary.
* are common in female gerbils with poor reproductive performance
  - sometimes difficult to diagnose
  - the most histologically diverse group of tumors
  - usually benign, but a few undergo malignant change
* can produce similar symptoms.
* have four stages.
* takes in the cystic variety, cancer and sarcoma, two malignant tumors.

Papillary tumor
* develop in cells that produce thyroid hormones containing iodine.
* portend a better survival than nonpapillary tumors.

Papilloma
* Some papillomas are near the nipple and are large enough to be felt
  - occur in dogs
* are benign tumors
  - diseases
  - small, wart-like growths in the lining of a mammary duct near the nipple
* have characteristic lobulated gross appearance.
* tend to occur most often along certain regions of the upper airway.

Pheochromocytoma
* are diseases
  - functionally active, catecholamine-secreting tumours of chromaffin tissue
  - part of a larger family of tumors called paragangliomas
  - rare endocrine tumors
* often cause the adrenal glands to make too many hormones called catecholamines.

### condition | illness | tumor:

Pituitary tumor
* Most pituitary tumors are benign
  - sporadic
* Some pituitary tumors cause excess secretion
  - headaches, impaired vision, and decreased pituitary gland function
  - prolactin secretion
* are known to compress the optic chiasm
  - usually benign or noncancerous
* can cause any one or more than one of the symptoms
  - vary in size and behavior
* cause gigantism and acromegaly when hormone secretion increased.
* do respond well to radiation therapy.
* present in many different ways.

Primary tumor
* are most commonly meningiomas and neurofibromas
  - transitional cell carcinoma
  - tumors that begin in the brain and tend to stay in the brain
* grow from tissues in the brain and their cause is unknown.
* produce angiogenic factors in much greater quantities than angiostatic factors.
* tend to occur in younger adults.

Rectal tumor
* are more common in males.
* can develop anywhere in the rectum.

Skin tumor
* Many skin tumors can hide and only be found during grooming and bathing.
* Some Skin Tumors Can Be Deadly.
* are one of the most frequent cancers from which horses suffer.

Small tumor
* are common on eyelids
  - usually asymptomatic and of no clinical significance
* produce hearing loss, tinnitus, and imbalance.

Strawberry hemangioma
* are more common in premature babies and in girls
  - the most common tumors of infancy
* develop after birth, grow rapidly, and usually go away on their own.
* is hemangioma.

Superficial tumor
* Most superficial tumors are well differentiated.
* affect only the bladder lining.
* are usually squamous cell carcinomas that are radiographically occult.
* involve only the lining of the bladder.

Teratoma
* Most teratomas are mature and develop into benign tumors.
* are diseases.
* are the most common germ cell tumor found in the ovaries
  - usually gonadal or midline in sacrococcygeal region, or retroperitoneum
* contain ectodermal, mesodermal, and endodermal elements.
* often contain several recognizable tissues.

Testicular tumor
* Some testicular tumors produce proteins, which can be detected in the blood called tumor markers.
* are extremely rare in pigs and cats
  - one such example
  - very common in older dogs

Viral illness
* Some viral illnesses cause coughs.
* are easier to spread from person to person than the bacterial ones.