Surgically excised cystic ECT
We identified 79 cases (78 patients, 1 bilateral) of a surgically excised cystic ECT (Table 4).4-6, 12, 17, 18, 20-28, 30-36, 39, 40, 42, 49, 51, 55, 57, 59-61, 63, 64, 66-69, 73 The majority (80%) of lesions were found in the neck. More than one modality of imaging was performed in 17 (30%).
Pre-operative diagnoses were reported in 49 cases and none of these included an ECT as a possible diagnosis. Pre-operative diagnoses include: neuroblastoma, tuberculosis, lymphatic malformation, branchial remnant, lymphadenopathy, dermoid cyst. Eleven patients underwent a FNAC/biopsy before definitive excision: diagnosis was ECT in 3 cases, inconclusive in 1 case and incorrect in 7 cases (3 branchial cysts, 1 benign retention cyst, 1 infected dermoid cyst, 2 lymphadenopathies). A normal mediastinal thymus was reported in 5 patients: no information was available in 73 patients.