Epidermoid Cyst—A Rare Mediastinal Mass
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Abstract :
A 39-year-old male was referred to our service for treatment of an asymptomatic mediastinal mass. The mass was detected on a routine pre-employment chest X-ray. CT scan showed a well-defined soft tissue mass measuring 7.5?×?5.5?×?5.3 cm in close relation to the right border of the heart. A CT-guided biopsy proved to be inconclusive as necrotic tissue was obtained. At exploratory thoracotomy, a well-defined cyst was found attached to the right side of the pericardium. The cyst was totally excised and sent for histopathological examination which came back with a surprise diagnosis of epidermoid cyst.

Case :
A 39-year-old asymptomatic man was referred to our service for evaluation of a mediastinal mass found incidentally on a pre-employment chest X-ray [Fig. 1a]. Further evaluation with CT scan showed a well-defined, smooth-outlined soft tissue mass in the anterior mediastinum measuring 7.5?×?5.5?×?5.3 cm. The lesion was closely related to the right heart border [Fig. 1b]. Lung fields were normal. There was no mediastinal lymphadenopathy. A CT-guided biopsy was attempted but proved inconclusive as only necrotic tissue was obtained. A decision to surgically excise the mass was made.....

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4425790/
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