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[A rare cause of posterior mediastinal tumors: mediastinal hydatid cyst]. 2016

Hicham Souhi, and Adil Zegmout, and Hicham Janah, and Hanane El Ouazzani, and Ismail Abderrahmani Rhorfi, and Ahmed Abid
Service de Pneumologie, Hôpital Militaire d'Instruction Mohammed V, Rabat, Maroc.

Mediastinal hydatid cyst is extremely rare even in endemic areas, representing 0-4% of all hydatid cyst locations. We report the case of a 50-year old patient admitted to our Department with a mass in the left dorsal paraspinal region; chest X-ray showed posterior left basal opacity. Chest CT scan showed posterior mediastinal mass located in the left costovertebral gutter extending from D9 to D11. MRI confirmed the existence of a posterior mediastinal mass with endocanalar extension and spinal cord compression, first evoking cystic schwannoma. These radioclinical data were consistent with a neoplastic origin; a transparietal biopsy was performed which showed a paucicellular specimen composed of translucent eosinophilic material with appearance just barely compatible with hydatid cyst. Hydatic serology was positive. The diagnosis of hydatid cyst was retained and the patient underwent thoracotomy which revealed mediastinal hydatid cyst, confirmed by histologic examination. The postoperative course was uneventful. Mediastinal location of hydatid cyst is very rare and poses a problem in differential diagnosis with other mediastinal tumors.

UI MeSH Term Description Entries
D008279 Magnetic Resonance Imaging Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques. Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D008297 Male Males
D008476 Mediastinal Cyst Cysts of one of the parts of the mediastinum: the superior part, containing the trachea, esophagus, thoracic duct and thymus organs; the inferior middle part, containing the pericardium; the inferior anterior part containing some lymph nodes; and the inferior posterior part, containing the thoracic duct and esophagus. Pericardial Cyst,Thoracic Cyst,Thymic Cyst,Tracheal Cyst,Cyst, Mediastinal,Cyst, Pericardial,Cyst, Thoracic,Cyst, Thymic,Cyst, Tracheal,Cysts, Mediastinal,Cysts, Pericardial,Cysts, Thoracic,Cysts, Thymic,Cysts, Tracheal,Mediastinal Cysts,Pericardial Cysts,Thoracic Cysts,Thymic Cysts,Tracheal Cysts
D008479 Mediastinal Neoplasms Tumors or cancer of the MEDIASTINUM. Cancer of Mediastinum,Mediastinal Cancer,Cancer of the Mediastinum,Mediastinum Cancer,Mediastinum Neoplasms,Neoplasms, Mediastinal,Cancer, Mediastinal,Cancer, Mediastinum,Cancers, Mediastinal,Cancers, Mediastinum,Mediastinal Cancers,Mediastinal Neoplasm,Mediastinum Cancers,Mediastinum Neoplasm,Neoplasm, Mediastinal,Neoplasm, Mediastinum,Neoplasms, Mediastinum
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D003937 Diagnosis, Differential Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures. Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D004443 Echinococcosis An infection caused by the infestation of the larval form of tapeworms of the genus Echinococcus. The liver, lungs, and kidney are the most common areas of infestation. Cystic Echinococcosis,Cysts, Hydatid,Hydatid Cyst,Hydatidosis,Echinococcus Granulosus Infection,Echinococcus Infection,Hydatid Disease,Cyst, Hydatid,Cystic Echinococcoses,Echinococcoses,Echinococcoses, Cystic,Echinococcosis, Cystic,Echinococcus Granulosus Infections,Echinococcus Infections,Granulosus Infection, Echinococcus,Granulosus Infections, Echinococcus,Hydatid Cysts,Hydatid Diseases,Hydatidoses,Infection, Echinococcus,Infection, Echinococcus Granulosus,Infections, Echinococcus Granulosus
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013902 Radiography, Thoracic X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs. Thoracic Radiography,Radiographies, Thoracic,Thoracic Radiographies
D013908 Thoracotomy Surgical incision into the chest wall. Thoracotomies

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