\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

SF is a fibrotic lesion with cells positive for CD34 and O13. It shares a common immunoprofile with PF but is distinct from dermatofibroma and other common spindle cell lesions of skin. O13 expression in SF has not been previously described.

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The clinical and histopathological features of 14 cases of so-called sclerosing haemangioma of the lung are described. All developed in Hong Kong Chinese women. Histochemical and ultrastructural study of these tumours indicates an epithelial origin. The term benign sclerosing pneumocytoma is suggested as being more appropriate for this unusual tumour.Liebow and Hubbell in 1956 described seven examples of a rare, benign pulmonary tumour under the term sclerosing haemangioma.' Patients presented with haemoptysis or with a coin lesion. The tumour showed a striking preponderance in women and was characterised microscopically by "vascular channels," sclerosis, papillae, sheets of cells, and haemorrhage in varying proportions. Considerable diagnostic confusion has occurred, however, since some of the reports have included plasma cell granuloma and histiocytic lesions inappropriately under the term sclerosing haemangioma and the reverse has also occurred.2-9 We review the clinicopathological features of 14 "sclerosing haemangiomas" that comply fully with the criteria of Liebow and Hubbell. This is the second largest series to be reported.'-'8 We also report the electronmicroscopic and histochemical findings for several of these tumours. On the basis of these findings we proffer the term benign sclerosing pneumocytoma as being more appropriate for this unusual tumour. MethodsThe 14 cases of "sclerosing haemangioma" studied were taken from the file of the Institute of Pathology, Hong Kong, from 1974 to 1980. Ten of these cases came from the Cardiothoracic Unit, Kowloon Hospital, including four that presented in 1980. The five most recent cases were also examined by electron microscopy from formalin-fixed material.All specimens were fixed in 10% buffered forma-

An effective but simple fixation protocol for the immunocytochemical staining of cytologic smears for estrogen and progesterone receptors, the Ki‐67 antigen (using MIB1 antibody), andc‐erbB‐2protein is described. One hundred twenty‐seven smears from a variety of malignant and benign breast lesions showed good preservation of antigenicity when subjected to the following fixation protocol: Freshly made smears were air‐dried for 20 min to 14 h at 22°C before immersing in 10% buffered formalin for 2–14 h. Immunostaining followed microwave‐stimulated epitope retrieval. There was strong concordance of staining with corresponding tissue sections in 15 cases of malignant tumors (ER: r = 0.7381; PR: r = 0.6684; MIB1: r = 0.7234). Immunostaining staining, when delayed for 5–10 days in about half the smears, showed no noticeable difference in reactivity, attesting to effective storage of the formalin‐fixed smears at room temperature. Diagn. Cytopathol. 17:127–133, 1997. © 1997 Wiley‐Liss, Inc.