Pituitary adenoma natural history, complications, and prognosis

Patients with pituitary adenoma may progress to develop lethargy, headache, nausea, and vomiting. Common complications of pituitary adenoma include bitemporal hemianopia , anosmia, acromegaly, gigantism and Cushing’s syndrome. Prognosis is generally good, and approximately 18% of patients with macroadenoma require further treatment.

• Pituitary adenomas are generally benign.
• Patients with micoradenoma usually asymptomatic and diagnosed incidentally. At later stage they may show signs and symptoms of hormonal disturbances.
• Patients with macroadenoma usually present with visual field deficits and hormonal disturbances. Macroadenoma grows slowly and invades surrounding structure such as optic chiasm and olfactory tract.
• Females tend to develop symptoms at an earlier stage than males due to menstrual irregularities associated with the disease.

• Complications associated with pituitary adenoma generally arise from either the mass itself or from prolonged hormonal imbalance. Complications may include:^[1][2][3]

• Gigantism
• Acromegaly
• Cushing’s syndrome
• Hyperpituitarism
• Pituitary apoplexy
• Pituitary insufficiency
• Central diabetes insipidus
• Bitemporal hemianopia
• Bilateral anopsia
• Anosmia
• Invasion into the cavernous sinus with occasional compression of the:

• Oculomotor nerve (CN III)
• Abducens nerve (CN VI)

• Hydrocephalus (seen in large adenoma)

• The prognosis of pituitary adenoma is generally good. However, recurrent symptoms require further intervention.

• Approximately 18% of patients with macroadenoma require further treatment.^[4]

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