Sarcoid reaction associated with Merkel cell carcinoma revealed by fluorodeoxyglucose positron emission tomography: a case report

IntroductionAlthough the association between cancer and sarcoidosis or sarcoid reaction is known, sarcoid reaction associated with Merkel cell carcinoma is rare.Case presentationWe report the case of a 57-year-old Japanese woman with Merkel cell carcinoma inthe inguinal area associated with sarcoid reaction. Fluorodeoxyglucose positron emission tomographydemonstrated elevated fluorodeoxyglucose uptake by mediastinal lymph nodes and at the carcinoma site.Histopathologically, the mediastinal lymph nodes contained no Merkel cell carcinoma components.

Sarcoid lesions were identified. Systemic examinations returned no sarcoidosis-specific findings.

Conclusion: Fluorodeoxyglucose positron emission tomographic scans can be used to assess neoplasticlesions and depict sarcoidosis.

Sarcoid reactions must be considered in the interpretation of fluorodeoxyglucose positron emission tomographic scans.

Author: Yuko HigashiKentaro MeraMitsuyoshi ShimokawaMitsuhiro HisadomeAtsunori BabaShigeto MatsushitaMasakazu YanagiTakuro Kanekura
Credits/Source: Journal of Medical Case Reports 2011, 5:282

Published on: 2011-07-05

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