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Year : 2019  |  Volume : 36  |  Issue : 2  |  Page : 176  

“Pearl” in the lung: Hydatid membrane

Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Date of Web Publication28-Feb-2019

Correspondence Address:
Dr. Inderpaul Singh Sehgal
Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/lungindia.lungindia_287_18

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How to cite this article:
Baldi M, Dhooria S, Agarwal R, Sehgal IS. “Pearl” in the lung: Hydatid membrane. Lung India 2019;36:176

How to cite this URL:
Baldi M, Dhooria S, Agarwal R, Sehgal IS. “Pearl” in the lung: Hydatid membrane. Lung India [serial online] 2019 [cited 2020 Oct 1];36:176. Available from: http://www.lungindia.com/text.asp?2019/36/2/176/253187


A middle-aged gentleman, nonsmoker, presented with complaints of right-sided chest discomfort for 6 months. There was no fever, cough, expectoration, or hemoptysis. Chest radiograph suggested a mass lesion in the right upper zone. A contrast-enhanced computed tomography demonstrated a well-defined cystic lesion with small air foci at periphery of the lesion (air-bubble sign) and contrast enhancement of cyst wall (ring enhancement sign)[1] [Figure 1]a. Flexible bronchoscopy showed a glistening pearly white membranous structure occluding the lumen of the right upper lobe anterior segment (RB3). For diagnosis, a cryoprobe was used [Video 1], which yielded a portion of the membrane. Histopathological examination revealed a degenerated hydatid cyst. The patient was initiated on albendazole therapy and is scheduled for surgical resection. Endobronchial visualization of hydatid membranes can be seen in about 20% of pulmonary hydatid cases.[2],[3] The imaging and bronchoscopic appearance in the index case is characteristic of an intact hydatid cyst [Figure 1]b. The mechanism of formation of hydatid cyst (hosts reaction to a parasite) is quite analogs to the formation of natural pearls, hence the title.
Figure 1: (a) Computed tomography scan showing well-defined cystic lesion in the right upper lobe; (b) bronchoscopic image demonstrating pearly white membranous structure, suggesting membrane of hydatid cyst

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Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

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Conflicts of interest

There are no conflicts of interest.

   References Top

Garg MK, Sharma M, Gulati A, Gorsi U, Aggarwal AN, Agarwal R, et al. Imaging in pulmonary hydatid cysts. World J Radiol 2016;8:581-7.  Back to cited text no. 1
Jerray M, Benzarti M, Garrouche A, Klabi N, Hayouni A. Hydatid disease of the lungs. Study of 386 cases. Am Rev Respir Dis 1992;146:185-9.  Back to cited text no. 2
Komurcuoglu B, Ozkaya S, Cirak AK, Yalniz E, Polat G. Pulmonary hydatid cyst: The characteristics of patients and diagnostic efficacy of bronchoscopy. Exp Lung Res 2012;38:277-80.  Back to cited text no. 3


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