Hydatid cyst is a zoonotic disease that is common in the Mediterranean region. Thoracic wall, rib or extrapulmonary intrathoracic localization of the cysts is very rare. Giant extrapulmonary intrathoracic hydatid cysts can lead to both diagnostic and treatment difficulties and can be confused with tumor. We present a case of a hydatid cyst with thoracic wall involvement mimicking tumor. We confirmed diagnosis only by surgical exploration and histopathological examination because radiology is not conclusive .Surgical treatment involved the total extirpation of cyst together wide debridement and resection of affected tissue. Primary thoracic wall closures were performed. In thoracic wall localization of cyst, post-operative course of albendazole for 6 weeks associated with surgery can help in sterilizing the cyst and reduce the recurrence rate. In this article, we presented a thoracic wall hydatidosis which is very uncommon asymptomatic presentation of hydatid cyst disease with its surgical management.

H emangiomas are proliferative lesions that are characterized by increased proliferation of vascular endothelial cells and are usually identified after birth. Mediastinal hemangioma is a rare entity that was first reported in 1914 by Shannon. [1] They comprise about 0.5% of all mediastinal tumors. [2] Preoperative diagnosis is difficult because, although there are characteristic findings in radiologic imaging studies, they are present in less than 20% of the cases. [3] Hemangiomas are predominantly seen in the anterior mediastinum. Fewer than 25 cases of posterior mediastinal hemangioma (PMH) have been reported in the English literature, none of which are from Turkey.

ÖZParatiroid kistler, mediastende son derece nadir kistik oluşumlardır. İlk tanımlandığından bu yana, İngilizce literatürde yaklaşık 150 olgu bildirilmiştir. Hastalar genellikle kitlenin basısına bağlı semptomlar ile başvurmakla birlikte, hiperparatiroidi bulguları olguların yalnızca %20 ila %40'ında mevcuttur. Hastalığın ön tanısında paratiroid sintigrafisi faydalı olabilmekle birlikte, tanı genellikle cerrahi numunelerin ameliyat sonrası patolojik incelemesi ile konur. En uygun cerrahi işlem, kitlenin total rezeksiyonu olup, cerrahi seçenek lezyonun boyutuna ve yerine göre torakotomi veya median sternotomi olabilir. Bu yazıda, mediastinal kitlenin sağ hemitoraksa uzandığı 67 yaşında bir erkek olgu sunuldu.Anah tar söz cük ler: Kist; mediastinal; paratiroid. ABSTRACTParathyroid cysts are extremely rare cystic formations in the mediastinum. Since the first described case, there have been approximately 150 cases reported in the English literature. Patients often present with symptoms related to compression of the adjacent tissues, while only 20 to 40% of cases have an evidence of hyperparathyroidism. For preliminary diagnosis, parathyroid scintigraphy can be helpful, although most cases are diagnosed by postoperative pathological analysis of surgical samples. The most optimal surgical procedure is total excision of the mass, where the surgical approach of choice can be either thoracotomy or median sternotomy according to the size and localization of the lesion. Herein, we report a 67-year-old male case of a mediastinal mass extending to the right hemithorax.

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