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[Treatment of pituitary adenoma]
1Service d'Endocrinologie et des Maladies de la Reproduction, CHU de Bicêtre, Le Kremlin-Bicêtre. pchanson@club-internet.fr
Abstract:
RECOMMENDED TREATMENTS: The different therapeutic strategies proposed for pituitary adenomas are relatively well-known thanks to numerous studies evaluating their effect on outcome. Unfortunately, large comparative clinical trials are difficult to construct due to the small number of cases of this rare condition. Therapeutic recommendations are thus generally based on the opinion of recognized experts. MICROADENOMA: Small (< 10 mm) prolactin-secreting adenomas should be treated surgically, generally by transsphenoidal adenomectomy, or medically by dopaminergic agonists: bromocriptin, quinagolide or cabergolin (the two latter drugs are more effective and better tolerated than their parent compound bromocriptin). MACROADENOMA: The expected success rate for surgical treatment of macroadenomas is low and dopaminergic agonists is generally recommended (including cases with visual impairment since the effect can be very rapid). Prolactin levels can be lowered and tumor volume reduced (in > 70% of cases). ACROMEGALY: Surgery is the firs intention treatment for acromegaly. In case of unsuccessful surgery (the criteria for "cure" are much more strict in 1998 than previously), somatostatin analog and/or hypothalamo-hypophyseal radiotherapy are recommended. Slow release formulations of somatostatin analogs can now be given by monthly (octreotide LP) or biweekly (lanreotide LP) injections. CUSHING'S DISEASE: Cure can be achieved in > 80% of cases with surgery, the first intention treatment of choice. If surgery is unsuccessful, radiotherapy can be proposed associated with anticortisol drugs (mitotane), if needed, while waiting for the late effect of radiotherapy. CLINICALLY SILENT ADENOMAS: Non-functional adenomas should be operated. Some propose adjuvant radiotherapy in all cases and others only if residual tissue persists post-operatively.
Insights
Treatment for pituitary adenomas varies by tumor type and size. Surgery and medical therapies like dopaminergic agonists are key options for prolactinomas, while acromegaly and Cushing's disease often require surgery or radiotherapy.
Area of Science:
- Endocrinology and Oncology
- Neurosurgery and Medical Therapeutics
Context:
- Pituitary adenomas are rare tumors, making large comparative clinical trials challenging.
- Therapeutic strategies are largely based on expert opinion and existing studies.
Purpose:
- To outline recommended treatment strategies for various types of pituitary adenomas.
- To provide guidance on managing microadenomas, macroadenomas, acromegaly, Cushing's disease, and clinically silent adenomas.
Summary:
- For microadenomas, surgical transsphenoidal adenomectomy or medical treatment with dopaminergic agonists are recommended.
- Macroadenomas often benefit from medical treatment with dopaminergic agonists, which can reduce prolactin levels and tumor size.
- Acromegaly and Cushing's disease primarily involve surgery, with radiotherapy and medication as secondary options if surgery is unsuccessful.
- Clinically silent adenomas are generally treated with surgery, with adjuvant radiotherapy considered in some cases.
Impact:
- Provides a consolidated overview of current treatment recommendations for pituitary adenomas.
- Aids clinicians in selecting appropriate therapeutic strategies based on tumor characteristics and patient presentation.
- Highlights the importance of medical and surgical interventions in managing pituitary tumors and associated hormonal imbalances.