Endochondral Pseudocyst of the Auricle in Chinese

Abstract

\s=b\ Thirty-one patients with endochondral pseudocysts of the auricle were seen over a four-year period in the Department of Surgery at the University of Hong Kong. The lesions chiefly affected Chinese males (90.3%); 80.6% involved the scaphoid fossa on the anterior surface of the pinna. They were usually asymptomatic and static in size. Excision of the anterior wall, followed by contour pressure dressing, gave cosmetically satisfactory results in 90% of the patients, and there were no recurrences. Pathologic studies revealed the absence of an epithelial lining as well as multiple cystic spaces that contained abundant glycosaminoglycans (acid mucopolysaccharides). We postulate that the overproduction of glycosaminoglycans engendered by repeated minor trauma to the cartilage was the primary cause of the pseudocysts. (Arch Otolaryngol 1984;110:792-796) The differential diagnoses of cystic lesions of the auricle include sebaceous cyst, dermoid cyst, hemato¬ ma auris, and pseudocysts. The term

Clinical characteristics and comparative study of different modalities of treatment of pseudocyst pinna

“…It was argued that chronic trauma induced cartilage degeneration due to release of the lysozymal enzymes with progressive dilatation and cyst formation within the auricular cartilage. We strongly support this hypothesis as trauma was seen in most of our cases but this fact was, however, not supported by a study, which disproved any increase in the lysozymal activity in the analysis of aspirated fluid [6]. The second theory hypothesized that congenital embryonic dysplasia of the auricular cartilage as the predisposing factor in the development of pseudocyst.…”

“…The volume of the aspirates was reported to have a range between 0.5 and 10 ml [4,6,18] and we found it between 1 and 3.5 ml.…”

“…This procedure has been found to be the best approach in many studies including ours. Choi et al [6] performed this procedure and the majority of cases they treated by this procedure was successful. In Lim et al [14] series none of the patients had recurrence following excision and compression buttoning of the pseudocyst.…”

“…Histologically, pseudocyst is characterized by an intracartilaginous cavity lacking in epithelial lining (hence the term pseudocyst) [6], and contain thinned cartilage and hyalinising degeneration along the internal border of the cystic space and granulation tissue [1]. Despite its unclear etiology, many investigators believe that repeated minor injuries were responsible for the formation of pseudocysts, particularly in patients with pre-existing congenital intracartilaginous defects associated with lymphatic and vascular channels while some believe that the cause is cartilaginous degeneration caused by the release of chondrocyte lysosomal enzymes [5].…”

Pressure appliance to prevent the recurrence of auricular seroma: A new clinical trial

“…As the etiology is obscure, various treatments are followed such as needle aspiration, curettage following incision and drainage and subsequent contour pressure dressing, deroofing procedure or insertion of a small drainage tube into the pseudocyst with a guide needle. 2 However, pressures dressing based on traditional methods are large and incumbent for the patient. We present a clinical trial of auricular seroma managed with an innovative double helical pressure appliance which is effective and does not pose embarrassment for patient to apply.…”