Xanthomatous leiomyosarcoma of the uterine cervix

A 52-year-old woman underwent a hysterectomy for a large tumor of the uterine cervix that was shown to be a xanthomatous leiomyosarcoma (LMS) by histologic examination, the first example of this tumor in this site. Two previous similar tumors have been reported in the uterine corpus.

Adenoid basal carcinoma of the uterine cervix: detection of integrated human papillomavirus in a rare tumor of putative "reserve cell" origin

This study investigated the role of human papillomavirus (HPV) in adenoid basal carcinoma, a rare neoplasm of the uterine cervix. Nine archival paraffin-embedded tumors were analyzed with non-isotopic in situ hybridization (NISH) for HPV types 6, 11, 16, 18, 31, and 33 using digoxigenin-labelled probes. The polymerase chain reaction (PCR) was performed on each of the cases using E6 consensus primers to HPV. A total of 67% of adenoid basal carcinomas harbored the HPV genome with NISH, of which 3 were PCR-positive. Integrated HPV 16 DNA was demonstrated in 4 of the 6 NISH positive cases. Two cases showed integrated HPV 33. HPV DNA was not detected in the three remaining cases. These results show that the integrated high-risk HPV, in particular type 16, is associated with this uncommon cervical tumor.

Exuberant fibroadenomatoid proliferation in a pulmonary mesenchymoma (hamartoma): report of a lesion mimicking a sclerosing pneumocytoma

We report the cytologic and histopathologic features of an unusual peripheral primary lung tumor in a 61-year-old female. The central portion showed features of typical pulmonary chondroid hamartoma (mesenchymoma). Arising from the peripheral margin of this tumor, however, was an exuberant proliferation of papillary mesenchymal structures lined by type 2 pneumocates, mimicking papillary sclerosing hemangioma (pneumocytoma). This extreme example of fibroadenomatoid proliferation shares histologic features with other pulmonary neoplasms characterized by mesenchymal cores lined by type 2 pneumocytes. We propose that such lesions be unified under the term "alveolar mixed tumor".

Immunohistochemical demonstration of progesterone receptor in hepatobiliary cystadenoma with mesenchymal stroma

A case of hepatobiliary cystadenoma with mesenchymal stroma is documented in which unequivocal immunostaining for progesterone receptors was observed in mesenchymal cells. These cells were negative for oestrogen receptor. This suggests that the proliferation of the stromal component may be related to the presence of endogenous progesterone.

Detection of integrated high risk human papillomavirus in adenoid cystic carcinoma of the uterine cervix

AIM

To investigate the role of human papillomavirus (HPV) in adenoid cystic carcinoma of the uterine cervix.

METHODS

Eleven archival, paraffin wax embedded specimens were analysed by non-isotopic in situ hybridisation (NISH) for HPV types 6, 11, 16, 18, 31, and 33 using digoxigenin labelled probes. The polymerase chain reaction (PCR) was carried out on each of the cases using consensus primers to HPV.

RESULTS

A total of eight adenoid cystic carcinomas harboured the HPV genome by NISH, of which five were PCR positive. Integrated HPV 16 DNA was demonstrated in seven of the eight NISH positive cases. One adenoid cystic carcinoma showed integrated HPV 31. HPV DNA was not detected in the three remaining cases.

CONCLUSIONS

Integrated high risk HPV genome, in particular type 16, is associated with this uncommon type of primary cervical cancer.

Langerhans' cell histiocytosis of the eyelid

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Intussusception of appendix with carcinoid tumour. A case report

During an operation for suspected appendicitis, no appendix was found at the confluence of the caecal taeniae. A mobile mass in the caecum was explored and intussusception of the appendix was identified. Histological examination of the specimen revealed carcinoid of the appendix. The diagnosis and management of intussusception of the appendix are discussed.