### activity | operation:

Cryosurgery
* Cryosurgeries are operations.
* appears to have significantly lower local recurrence rates in high risk patients.
* can be safer, cheaper, less painful and more effective than scalpel surgery
  - effectively remove warts
* destroys tissue by application of extreme cold in the form of liquid nitrogen.
* has a significantly lower rate of urinary and fecal incontinence
  - much lower complication rates in radiation failures than radical prostatectomy
* involves freezing the prostate
  - to remove excess or harmful tissue
  - much less removal of the normal liver than traditional surgery
* involves the placement of a stainless steel probe into the center of the tumor
  - same process, but the depth of freezing is much greater
* is an ablative treatment that destroys abnormal tissue by freezing
  - painful and often requires multiple treatments
  - the destruction of abnormal tissue using sub-zero temperatures
  - used extensively for treatment of both primary and metastatic liver tumors
* is used for clinically well defined in situ tumors
  - local control of the tumor and as an adjunct to hormone therapy
  - utilized for solar keratoses, and well-defined basal and squamous cell carcinomas
  - widely available in gynecologists' offices for the treatment of cervical neoplasias
* kills the cancer by freezing it.
* leaves little or no scar.
* method of killing tumor cells with extreme cold temperatures using liquid nitrogen.
* produces better results than podophyllin or trichloroacetic acid.
* surgical technique that uses liquid nitrogen to freeze the skin.
* technique that uses cold temperatures with cryoprobes to destroy prostatic tissue.
* treatment option that involves the freezing of tissue.
* type of surgery that kills the cancer by freezing it.
* uses ultrasonic monitoring to direct a cold probe into the liver tumor.
* utilizes extremely low temperatures to destroy abnormal tissue containing cancers.

Curettage
* is an operation
* often fails to remove endometrial polyps because of the mobility of their body and tip.

Enucleation
- removal of the eye
  - still the best treatment for large tumors
* is the removal of the eye from the orbit while preserving all other orbital structures
  - treatment of choice
* remains the most frequent treatment for retinoblastoma.
* removes all of the eye's content and covering by detaching the eye muscles
  - the entire eye

Exponentiation
* has a higher precedence than multiplication or division.
* is an operation
* shorthand notation for repeated multiplication.

### activity | operation | exponentiation:

Modular exponentiation
* basic transformation of majority of public key cryptoalgorithms.
* mathematical operation that is at the heart of public-key cryptography.

### activity | operation | eye surgery:

Vitrectomy
* can be very effective, particularly when combined with intraoperative laser treatment
  - lead to complications, most commonly an increase in how fast cataracts develop
* is an outpatient surgery performed in the operating room under local anesthesia
  - another surgical method to treat some types of retinal detachment
  - eye surgery
* means to remove the vitreous humor.
* remains an operation performed only on eyes in which no other treatment is useful.
* removes the blood-filled vitreous and replaces it with a clear solution.
* when used for pathological conditions is frequently sight-saving.

Fenestration
* Refers to the placement of windows upon an elevation.
* are medical procedures
  - placements
* rare congenital vascular anomaly in which the artery is divided into two channels.
* refers to an opening in a building to admit light or air.

Flop
* are descents
  - failure
* is an operation

### activity | operation | gastrectomy:

Total gastrectomy
* Total gastrectomies mandate connecting the esophagus directly to the small intestine.
* means removal of the whole stomach.