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30 Possible Causes for Absent Posterior Pituitary Bright Spot

  • Posterior Pituitary Disease

    pituitary bright spot should prompt the consideration of the following (noting it may be absent in normal patients): ectopic posterior pituitary central diabetes insipidus[radiopaedia.org] […] posterior aspect of the pituitary fossa normal measurements (decreasing size with age) 1,2 long axis: 1.2-8.5 mm short axis: 0.4-4.4 mm Related pathology The absence of posterior[radiopaedia.org]

  • Wolfram Syndrome

    Magnetic resonance imaging of the brain was diffuse cerebral degeneration along with absent posterior pituitary bright spot.[cjhr.org] The 24 h urine output, urine osmolality, serum osmolality, urine sodium levels, and formal water deprivation test along with absent posterior pituitary bright spot were suggestive[cjhr.org]

  • Hypothalamic Lesion

    posterior pituitarybright spot” Neurosarcoid Adult with stalk, meningeal lesions Other infectious/inflammatory lesions that can mimic sarcoid Wegener granulomatosis TB,[neupsykey.com] […] predominance in pineal gland) 10% “double” midline lesions (pineal & hypothalamus) DI, diencephalic syndrome, precocious puberty common Thick enhancing stalk, 3rd floor, absent[neupsykey.com]

  • Diabetes Insipidus

    This contrast enhanced dynamic MR shows an absent posterior pituitary bright spot on the pre-enhanced T1WI.[radiopaedia.org] The posterior pituitary bright spot decreases with a prolonged stimulus to AVP secretion and has been variably reported to be absent in other polyuric disorders.[endocrinologyadvisor.com] T1 T1 sagittal images-Note absence of the posterior bright spot.[radiopaedia.org]

  • Basal Ganglia Mass Lesion

    posterior pituitary bright spot Meningioma (left atrium) Metastases, lymphoma Ependymoma (4th ventricle) Subependymoma (rare, 4th ventricle or frontal horn) Choroid plexus[quizlet.com] Vein of Galen malformation Temporal lobe lesion, adult GBM, metastasis Ganglioglioma (young adult, also parietal lobe/cerebellum), DNET HSV Trauma Mesial temporal sclerosis Absent[quizlet.com]

  • Pituitary Dwarfism

    The above case is a non-contrast MRI with an absent posterior pituitary bright spot (yellow arrow), an absent or thin stalk (green arrow), and an ectopic bright spot in the[roentgenrayreader.blogspot.com] posterior pituitary bright spot The exact cause of high T1 signal is uncertain and may relate to neurosecretory granules or high lipid content of the posterior pituitary[radiopaedia.org] An ectopic posterior pituitary lobe can also be seen in cases of pituitary stalk transection and septo-optic dysplasia and as an asymptomatic variant.[roentgenrayreader.blogspot.com]

  • Isolated optic nerve hypoplasia

    absent posterior pituitary bright spot (n   4).[ijpeonline.biomedcentral.com] A non-visualized posterior pituitary bright spot was an isolated finding for three subjects (no DI), and associated with an absent stalk in one subject (no DI).[ijpeonline.biomedcentral.com] Pituitary gland abnormalities included an absent or hypoplastic pituitary gland in (n   18), ectopic posterior pituitary (n   13), absent or truncated stalk (n   13), and[ijpeonline.biomedcentral.com]

  • Central Diabetes Insipidus

    This contrast enhanced dynamic MR shows an absent posterior pituitary bright spot on the pre-enhanced T1WI.[radiopaedia.org] (n 8) 0.6–15.3 y (mean 6.5) Abbreviations: CDI, central diabetes insipidus; PPBS, posterior pituitary bright spot. a P .03 for association between initial stalk thickness[academic.oup.com] T1 T1 sagittal images-Note absence of the posterior bright spot.[radiopaedia.org]

  • Autoimmune Hypophysitis

    LINH can be differentiated from other causes of headache by characteristic symptomatology, and MRI findings (loss of normal posterior pituitary bright spot on T1-weighted[mamcjms.in] T1 affected area is isointense with slight signal heterogeneity normal posterior pituitary bright spot may be absent 8 T1 C (Gd) can variably enhance, usually homogeneously[radiopaedia.org] Figure 2: Coronal T1-weighted post-contrast image showing thickened pituitary stalk Click here to view Figure 3: Mid sagittal T1-weighted image showing absent posterior pituitary[mamcjms.in]

  • Rabson Mendenhall Syndrome

    In patients with LCH, posterior pituitary bright spot is usually absent.[ijem.in] Multiple pituitary hormone deficiency (MPHD), isolated GH deficiency (IGHD), and diabetes insipidus (DI) are the abnormalities associated with absent posterior pituitary bright[ijem.in] Clinically, the patient presents with pituitary dwarfism or idiopathic growth hormone deficiency. [18] , [19] Absence of pituitary bright-spot Absence of posterior pituitary[ijem.in]

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