grand rounds conference tala kassm do august 21 st, 2015 university of louisville department of...
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Grand Rounds Conference
Tala Kassm DOAugust 21st, 2015
University of LouisvilleDepartment of Ophthalmology and
Visual Sciences
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Subjective CC: “My side vision is worse.”
HPI: 67 year old white male complains of progressive decreased peripheral vision OU over 3-4 months. He denies flashes, floaters, scotoma or eye pain.
Review of Systems: positive for headaches, general fatigue, increased fluid intake, aches and pains. Negative for weight loss or sexual dysfunction.
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History
POH: none
PMH: hypertension, COPD
Family Hx: noncontributory
Meds: Albuterol, amlodipine, metoprolol
Allergies: azithromycin, niacin, clindamycin
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Clinical Exam
OD OS
VA(cc,D): 20/20 20/25(plano +3.25x178)
(+1.75+1.00x170)
Pupils: 4->2 no rAPD 4->2
IOP: 13 17EOM: FULL FULL
CVF: bilateral temporal defect, worse OD than OS
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Clinical Exam
SLE: OD OSExternal/Lids WNL WNLConj/Sclera white & quiet white & quietCornea clear clear Ant Chamber deep & quiet deep & quietIris WNL WNLLens 1-2+ NS 1-2+ NSVitreous Clear Clear
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Clinical Exam
Dilated Fundus Exam:
OD: ON c/d 0.4, pink and sharp M/V/P: WNL
OS: ON c/d 0.5, pink and sharp M/V/P: WNL
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HVF 24-2 OS
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HVF 24-2 OD
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HVF 24-2 OU
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MRIMRIT1
Sagittal
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MRIMRIT1
Transverse
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MRIT2
Transverse
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Lab results
Prolactin T3, T4, TSH Cortisol, ACTH stimulation test LH, FSH Serum osmolarity Testosterone and IGF-1 all within
normal limits
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Assessment 67 year old male with progressive
temporal vision loss over 3-4 months. MRI revealed a pituitary mass.
Diagnosis: Nonsecreting Pituitary Macroadenoma
Differential includes: meningioma, craniopharyngioma, internal carotid artery aneurysm
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Plan
Given that the tumor is non secreting, medical management with bromocriptine was thought to be ineffective.
Patient was referred to neurosurgery for endonasal endoscopic tumor resection.
Surgery date pending.
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Pituitary Adenoma
Benign epithelial tumor Most common sellar mass,
composing 10-15% of all intracranial tumors
Incidence is 1-7 cases per 100,000 Rare in childhood Age-linked – increase with each
decade By 80th decade, small adenomas
found in more than 20% of pituitary glands
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Classification
Size Microadenoma: <1cm Macroadenoma: >1cm
Activity Functional (74%) Non-functional (26%)
95% present as macroadenomas 2/3 of these patients have visual field
defects
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Presentation
Functioning Lactotroph (Prolactin): amenorrhea,
galactorrhea Somatotroph (Growth hormone):
gigantism and/or acromegaly Corticotroph (ACTH): Cushing’s
syndrome Thyrotroph (TSH): weight loss,
tachycardia, diarrhea Non-functioning
Headache VF defects
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Presentation
Impaired vision is the most common symptom that leads a patient with a nonfunctioning adenoma, to seek medical attention.
Due to suprasellar extension of the adenoma, leading to compression of optic chiasm.
Leads to bitemporal hemianopsia Diminished visual acuity with more
severe optic chiasm compression
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Anatomy
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Treatment
Observation Medical: Bromocriptine for
prolactinomas Surgery: transfrontal or
transsphenoidal approach Radiotherapy
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Post Treatment
Vision recovery rapid after surgical resection of tumor, even with severe vision loss Onset of improvement within 24 hours
Slower improvement with medical management of tumor
Prognosis is poor if retinal nerve fiber layer thickness is less than 75 microns, by OCT scan
First sign of recurrence may be vision loss
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Associated Syndromes
Multiple Endocrine Neoplasia Type 1 Pituitary Adenomas (prolactinomas) Parathyroid Pancreatic Islet cell tumor
Pituitary Apoplexy Acute hemorrhage or infarction of a
pituitary tumor Potentially life threatening Sudden onset of severe headache,
nausea, altered consciousness, vision loss, diplopia, and/or ptosis
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Other causes of parasellar tumor
Meningiomas Middle-aged women Often produce asymmetric bitemporal
vision loss Craniopharyngiomas
Common in children but may present at any age
Second incidence peak in adulthood Arise superiorly, produce inferior
bitemporal visual field loss Internal carotid artery aneurysms
(supraclinoid region) Markedly asymmetric chiasmal syndrome Optic nerve compression on side of
aneurysm
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The time course of visual field recovery and changes of retinal
ganglion cells after optic chiasmal decompression
Investigated the time course of visual field recovery and changes of retinal ganglion cells after chiasmal decompression.
Prospective analysis – 19 patients, pre op, then 1, 3 and 6 months after surgery
Used standard automated perimetry, optical coherence tomography, photopic negative response (PhNR).
Compared to 20 controls with normal eyes Pre operatively, all parameters worse in
affected eyes as compared to control
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The time course of visual field recovery and changes of retinal
ganglion cells after optic chiasmal decompression
After surgery, visual field significantly improved by 3 month.
Retinal nerve fiber layer (RNFL) thickness and ganglion cell complex (GCC) area were significantly reduced at three months
At six months post op: average RNFL thickness, GCC area and PhNR/b-wave ratio showed significant improvement
Visual fields were significantly correlated with RNFL thickness and GCC area.
VF recovery preceded demonstrable retinal regeneration
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The time course of visual field recovery and changes of retinal
ganglion cells after optic chiasmal decompression
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References BCSC: Neuro-Ophthlamology. Pgs 146-151 Pituitary Tumors: adenoma, craniopharyngioma, cysts. Mayfield
Clinic and Spine Institute. Feb 2013. pgs 1-6 Danesh-Meyer HV, Papchenko T. In vivo retinal nerve fibery layer
thickness measured by optical coherence tomography predicts visual recovery after surgery for parachiasmal tumors.
Ferrante E, Ferraroni M, Castrignano T, Menicatti L, Anagni M, Reimondo G, et al. Non-functioning pituitary adenoma database: a useful resource to improve clinical management of pituitary adenomas. Eur J Endocrinol 155: 823-829, 2006.
Galal A, Faisal A. Determinants of postoperative visual recovery in suprasellar meningiomas.
Loeffler JS, Shih HA. Radiation therapy in the management of pituitary adenomas.
Moon CH, Hwang SC, Ohn YH, Park TK. The Time course of visual field recovery and changes of retinal ganglion cells after optic chiasmal decompression. Invest Ophthalmol Vis Sci. 2011 Oct 10;52(11):7966-73.
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Thank you for listening!