Indian Journal of Nuclear Medicine
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CASE REPORT
Year : 2011  |  Volume : 26  |  Issue : 1  |  Page : 34-35

Incidental detection of clinically occult follicle stimulating hormone secreting pituitary adenoma on whole body 18-Fluorodeoxyglucose positron emission tomography-computed tomography


1 Department of Nuclear Medicine and PET-CT, Jaslok Hospital and Research Centre, Mumbai, India
2 Department of Radiology, Jaslok Hospital and Research Centre, Mumbai, India

Correspondence Address:
Prathamesh Joshi
Department of Nuclear Medicine and PET-CT, Jaslok Hospital and Research Centre, Worli, Mumbai - 400 026
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-3919.84611

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A 73-year-old man, known case of Hodgkin's lymphoma, underwent 18-Fluorodeoxyglucose positron emission tomography-computed tomography (18-FDG PET-CT) for post-chemotherapy evaluation of the disease status. The scan revealed focal increased FDG uptake in pituitary fossa. The CT images showed homogenously enhancing pituitary lesion causing expansion of the sella. A possibility for the presence of pituitary adenoma was raised in the report. Hormonal assay of the patient showed raised follicle stimulating hormone (FSH) level of 18 IU/ml (normal range for males up to 5 IU/ml). All the other pituitary hormones were within the normal range. Nuclear magnetic resonance (NMR) imaging of brain showed a pituitary lesion with expanded sella pushing the optic chiasma superiorly. NMR findings confirmed the presence of pituitary macroadenoma. A final diagnosis of FSH secreting pituitary macroadenoma was made.


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