Tumor of the pituitary gland is called a pituitary tumor.The pituitary gland plays a major role in the production of some of the hormones such as adrenocorticotropic and thyroid-stimulating hormone which also is responsible for the simulation of other glands. Most of the time pituitary tumors (pituitary adenomas) are benign tumors. Therefore, these tumors do not spread around and do not get to the point in which they threaten the patient’s life. Therefore, sometimes surgeons decide not to perform the removal since in such cases the Surgery's benefits might be less than its complications.
There are two general categories of pituitary tumors, determined by their size:
• Microadenomas – adenomas of a size smaller than 1 cm.
• Macroadenomas – adenomas bigger than 1 cm.
Also, adenomas can be classified with accordance to their type of pituitary hormones which production is affected by them. Adenomas might influence the level of hormone production; it might decrease or increase production. These changes may cause some medical conditions which are not life-threatening, such as Cushing’s disease and other hormone-related syndromes. In addition, macroadenomas might influence the patient’s sight.If their influence is too great to be limited in non-invasive ways, doctors decide for a pituitary tumor removal.
Patients who have big adenomas (macroadenomas) which affects their hormones and/or sight significantly, can be the candidates for pituitary tumor removal. Other kind of pituitary tumor treatment is thought to be ineffective in such cases.
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