Watchful waiting for some children with a mediastinal mass: the potential role for ¹⁸F-fluorodeoxyglucose positron emission tomography: a case report and review of the literature.

Abstract:

BACKGROUND:Benign hyperplastic thymus is a rare but important differential diagnosis of anterior mediastinal lesions. Histological and radiological criteria are used to distinguish this benign condition from other malignant diseases but have their limitations, and biopsy of mediastinal masses can be risky. We report for the first time the diagnostic value of fluorodeoxyglucose 18F positron emission tomography for patients with incidentally identified anterior mediastinal masses to avoid biopsy in some cases. CASE PRESENTATION:A 2 year old girl presented with new onset of emesis and constipation leading to the incidental discovery of an anterior mediastinal mass on radiograph. Chest computed tomography revealed cystic components within the mass concerning for a malignancy. Biopsy of the lesion and bone marrow aspiration and biopsy were negative but there was concern that the mediastinal biopsy may have missed the malignant component of the lesion. Hence, a positron emission tomography scan was obtained that showed mild homogeneous fluorodeoxyglucose 18F avidity within the mass similar to that of normal thymus. The diagnosis of benign hyperplastic thymus was made. CONCLUSION:The differential diagnosis of an incidentally found anterior mediastinal mass includes malignancy, but benign lesions such as benign hyperplastic thymus must also be considered, particularly when the complete blood count and biochemical profile are normal. Fluorodeoxyglucose 18F positron emission tomography can help guide a clinician's decision for further interventions and treatment.

journal_name

BMC Pediatr

journal_title

BMC pediatrics

authors

Nguyen R,Coleman JL,Howard SC,Metzger ML

doi

10.1186/1471-2431-13-103

subject

Has Abstract

pub_date

2013-07-10 00:00:00

pages

103

issn

1471-2431

pii

1471-2431-13-103

journal_volume

13

pub_type

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