Respir Case Rep. 2013; 2(2): 82-85 | DOI: 10.5505/respircase.2013.20592

Spontaneously Regressing Thymic Cyst

Dildar Duman¹, Tülin Kuyucu¹, Dilek Ernam¹, Emine Nur Koç¹, Fatma Merve Tepetam^2
1Sureyyapasa Chest Disease And Thoracic Surgery Research And Training Hospital, Department Of Pulmonology, Ýstanbul
²Sureyyapasa Chest Disease And Thoracic Surgery Research And Training Hospital, Department Of Allergy, Ýstanbul

Thymic cysts are uncommon lesions, constituting 1- 3% of all mediastinal masses. Most of these cysts are asymptomatic and found incidentally through routine chest roentgenograms. Our patient was asymptomatic, and a routine chest x-ray revealed mediastinal widening. A mediastinal mass, 6x4 cm in dimension, was detected by computed tomography. The lesion was hypodense, well defined, and cystic in nature. Magnetic resonance imaging of the thorax revealed a typical cyst expanding from the rudimentary thymus tissue. Although total excision of the cyst is the preferred treatment modality in these patients, close radiological follow-up of our patient revealed total remission. In conclusion, asymptomatic thymic cysts can be radiologically monitored and spontaneous remission can be observed.

Keywords: Mediastinum, thymic cyst, magnetic resonance imaging.

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Spontan Gerileyen Timik Kist

Dildar Duman¹, Tülin Kuyucu¹, Dilek Ernam¹, Emine Nur Koç¹, Fatma Merve Tepetam^2
1Süreyyapaþa Göðüs Hastalýklarý Ve Göðüs Cerrahisi Eðitim Ve Araþtýrma Hastanesi, Göðüs Hastalýklarý Kliniði, Ýstanbul
²Süreyyapaþa Göðüs Hastalýklarý Ve Göðüs Cerrahisi Eðitim Ve Araþtýrma Hastanesi, Allerji Kliniði, Ýstanbul

Timik kistler nadir görülen, mediastinal kitlelerin %1-3 ünü oluþturan patolojilerdir. Genellikle asemptomatiktir ve rutin akciðer grafilerinde saptanýr. Herhangi bir yakýnmasý olmayan olgumuzda tarama amacýyla çekilen akciðer grafisinde mediastinal geniþleme izlendi. Bilgisayarlý tomografide 6x4 cm çapýnda, hipodens, kistik yapýda mediastinal lezyon saptandý. Manyetik rezonans görüntüleme ile kistin rudimentar timus dokusundan uzandýðý görüldü. Diðer timik kist olgularýnda tercih edilen tedavi yaklaþýmý kistin total eksizyonudur, ancak olgumuz radyolojik takibe alýndý ve total remisyon izlendi. Sonuç olarak, semptomu olmayan, radyolojik olarak timik kist kabul edilen olgular takibe alýnabilir ve takiplerinde spontan remisyon görülebilir.

Anahtar Kelimeler: Mediasten, timik kist, manyetik rezonans görüntüleme.

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