Diagnostic Imaging of the Pituitary and Parasellar Region

Bladowska, Joanna; Sąsiadek, Marek

doi:10.5772/33871

Cited by 12 publications

(12 citation statements)

References 16 publications

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“…They account for approximately 3% of all intracranial neoplasms and 8% of sellar/parasellar tumors [1,23]. In plain MR craniopharyngiomas (especially in an intrasellar location and with enhancing the solid part of a tumor), may be easily misdiagnosed as pituitary adenomas.…”

Section: Discussionmentioning

confidence: 98%

“…Sellar/parasellar tumors constitute 10-15% of all primary intracranial neoplasms and are the most common causes of pituitary dysfunction and field of view disturbance [1,2]. Therefore, early correct diagnosis and therapy of patients with sellar/parasellar tumors are of high importance in clinical practice.…”

Section: Introductionmentioning

confidence: 99%

“…The most common pituitary tumors are adenomas, which on MR can present various enhancement patterns and other imaging features. About 18% of macroadenomas contain cystic components, about 20% show foci of hemorrhage, which are usually clinically asymptomatic and diagnosed incidentally in MR imaging [1,2]. Calcifications in pituitary adenomas are reported in 0.2-8% of cases [3].…”

Section: Introductionmentioning

confidence: 99%

“…The plain MR appearance of different sellar/parasellar lesions may be very similar, which often leads to misdiagnosis. The proper choice of surgical approach requires the correct preoperative diagnosis of sellar/parasellar tumors [1,4].…”

Section: Introductionmentioning

confidence: 99%

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Usefulness of perfusion weighted magnetic resonance imaging with signal-intensity curves analysis in the differential diagnosis of sellar and parasellar tumors: Preliminary report

Bladowska

Zimny

Guziński

et al. 2013

European Journal of Radiology

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Usefulness of perfusion weighted magnetic resonance imaging with signal-intensity curves analysis in the differential diagnosis of sellar and parasellar tumors: Preliminary report

Bladowska

Zimny

Guziński

et al. 2013

European Journal of Radiology

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“…Currently, MR is the method of choice for imaging of the pituitary gland and the perisellar area. Advanced MR techniques – MR diffusion, MR spectroscopy and MR perfusion – have been increasingly applied [1–12]. …”

Section: Introductionmentioning

confidence: 99%

Are T2-weighted images more useful than T1-weighted contrast-enhanced images in assessment of postoperative sella and parasellar region?

et al. 2011

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SummaryBackgroundThe proper diagnosis and management of patients after surgery for pituitary tumors are of great importance in clinical practice. The purpose of this study was to investigate the magnetic resonance features of the postoperative sella with fast spin echo T2-weighted imaging and to evaluate the benefits of this sequence compared to the classically performed contrast-enhanced T1-weighted imaging at 1.5T unit.Material/MethodsThe study group consisted of 101 patients who underwent resection of pituitary tumors. There were 58 women (57.4%), aged 22 to 75 (mean age, 52.67 years) and 43 men (42.6%), aged 21 to 79 (mean age, 49 years). In all patients preoperative and multiple postoperative MR studies were performed. Post-contrast T1 and pre-contrast T2 images were interpreted by 2 independent readers (neuroradiologists).ResultsContrast-enhanced T1-weighted imaging was significantly superior to T2-weighted imaging in assessment of infundibulum (p<0.05). There was no statistically significant difference for each of readers between T1- and T2-weighted images regarding to the following features: visualization of residual pituitary gland (p=0.062 and p=0.368), contours of pituitary (p=0.959 and p=0.265), optic chiasm (p=0.294 and p=0.843), and visualization of presence of residual tumor (p=0.204 and p=0.169). T2-weighted images were significantly superior to contrast-enhanced T1-weighted imaging with regard to visualization of contours of residual tumors (p<0.05).ConclusionsT2-weighted images may help to discriminate tumorous from non-tumorous involvement of the postoperative sella and the sphenoid sinus. T2-weighted images are also very useful for a long time after the resection in the postoperative evaluation of the implanted muscle with fascia.

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Neuroimaging of central diabetes insipidus—when, how and findings

et al. 2018

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Central or neurogenic diabetes insipidus (CDI) is due to deficient synthesis or secretion of antidiuretic hormone (ADH), also known as arginine vasopressin peptide (AVP). It is clinically characterised by polydipsia and polyuria (urine output > 30 mL/kg/day) of dilute urine (< 250 mOsm/L). It is the result of a defect in one of more sites involving the hypothalamic osmoreceptors, supraoptic or paraventricular nuclei of the hypothalamus, median eminence of the hypothalamus, infundibulum or the posterior pituitary gland. A focused MRI pituitary gland or sella protocol is essential. There are several neuroimaging correlates and causes of CDI, illustrated in this review. The most common causes are benign or malignant neoplasms of the hypothalamic-pituitary axis (25%), surgery (20%), head trauma (16%) or familial causes (10%). No cause is identified in up to 30% of cases. Knowledge of the anatomy and physiology of the hypothalamo-neurohypophyseal axis is crucial when evaluating a patient with CDI. Establishing the aetiology of CDI with MRI in combination with clinical and biochemical assessment facilitates appropriate targeted treatment. The aim of the pictorial review is to illustrate the wide variety of causes of CDI on neuroimaging, highlight the optimal MRI protocol and to revise the detailed neuroanatomy and neurophysiology required to interpret these studies.

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Diagnostic Imaging of the Pituitary and Parasellar Region

Cited by 12 publications

References 16 publications

Usefulness of perfusion weighted magnetic resonance imaging with signal-intensity curves analysis in the differential diagnosis of sellar and parasellar tumors: Preliminary report

Usefulness of perfusion weighted magnetic resonance imaging with signal-intensity curves analysis in the differential diagnosis of sellar and parasellar tumors: Preliminary report

Are T2-weighted images more useful than T1-weighted contrast-enhanced images in assessment of postoperative sella and parasellar region?

Neuroimaging of central diabetes insipidus—when, how and findings

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