Biomedical subjects

Yumi Honda

Publications and source records attributed to Yumi Honda.

4 recordsLinked to original sources

PubMed2005

Simultaneous human papillomavirus 6 (HPV 6) -positive condyloma acuminatum, HPV 31-positive Bowen's disease, and non HPV-associated extramammary Paget's disease coexisting within an area presenting clinically as condyloma acuminatum.

An 83-year-old Japanese man presented with multiple verrucous papules clustering on a plaque located on the frontal aspect of the scrotum. Histologically, there were three distinct epithelial changes compatible with condyloma acuminatum, Bowen's disease, and extramammary Paget's disease (EMPD). By in situ hybridization, the zone of condyloma acuminatum was positive for HPV 6 and well demarcated from HPV 31-positive Bowen's disease. EMPD was negative for targeted HPV 6/11/16/18/31/33 probes. Immunohistochemically, Paget's cells expressing cytokeratin 7 were distributed as scattered single cells or clusters mainly in the lower part of the HPV 6/31-positive epithelium. To the best of our knowledge, this is the first reported case of the occurrence of condyloma acuminatum, Bowen's disease, and EMPD within the same lesion.

Aged, 80 and over↗

PubMed2005

Extramammary Paget's disease not only mimicking but also accompanying condyloma acuminatum. A case report.

Although its significance remains unknown, it has recently been reported that epidermal papillomatous hyperplasia could be frequently found in extramammary Paget's disease (EMPD). The simultaneous occurrence of EMPD and various human-papillomavirus (HPV)-associated neoplasms has also been reported. We report a case of a perianal EMPD with multiple verrucous papules on its surface. Histologically, the verrucous papules consisted of two distinct histological patterns; one showed numerous Paget's cells within the hyperplastic epidermis with papillomatosis, and the other showed the features compatible with condyloma acuminatum (CA). HPV-6 DNA was demonstrated in koilocytic keratinocytes of the CA by in situ hybridization. No positive signal was obtained for targeted HPV type 6/11/16/18/31/33 DNA in either the verrucous or plaque EMPD. Since the verrucous papules were localized on the plaque of EMPD, our case suggests that some undetermined EMPD-related factors may contribute to the development of epithelial hyperplasia, including HPV-associated neoplasms.

Aged↗

PubMed2004

Differential expression of basement membrane type-IV collagen alpha1, alpha2, alpha5 and alpha6 chains among the histological subtypes of adenoid cystic carcinoma.

Six distinct alpha(IV) chains in the basement membrane (BM) of adenoid cystic carcinoma (ACC) of the salivary gland were immunohistochemically examined by anti-alpha(IV) chain-specific antibodies, and their expressions were compared with the histological subtypes and the expressions of cytokeratin 19 (CK19), cytokeratin 14 (CK14) and alpha-smooth muscle actin (alpha-SMA) and Ki-67. In the BM of normal salivary ducts, alpha1(IV), alpha2(IV), alpha5(IV) and alpha6(IV) chains were continuously stained, but alpha3(IV) and alpha4(IV) chains were negative. In the tubular and cribriform subtypes of ACC, tubules with continuous staining of alpha5(IV) and alpha6(IV) chains showed the biphasic-staining pattern among the expressions of CK19, CK14 and alpha-SMA. However, in cancer-cell nests with discontinuous or negative staining of alpha5(IV) and alpha6(IV) chains, the biphasic pattern was ambiguous. In the solid subtype, the staining of alpha1(IV) and alpha2(IV) chains was discontinuous, the staining of alpha5(IV) and alpha6(IV) chains was negative and the biphasic-staining pattern was unclear. The mitotic activity of cancer cells analyzed by the Ki-67 labeling index was significantly related to the expression of alpha5(IV) and alpha6(IV) chains in the cribriform subtype. These results suggest that BM irregularity with the differential expression of alpha(IV) chains in ACC closely relates to cell proliferation, cell differentiation and histological structure.

Adult↗

PubMed2002

Multiple palmar epidermoid cysts.

Implantation of epidermal fragments into the dermis has been pointed out as the cause of common epidermal cysts. However, some palmoplantar epidermoid cysts have been reported to be caused by human papillomavirus (HPV) infection or to be derived from eccrine ducts. A 65-year-old left-handed woman presented with extraordinary multiple epidermoid cysts on the palm and volar aspect of the fingers of her left hand. HPV infection was not detected by immunohistochemistry, in situ hybridization and polymerase chain reaction. Histological investigation revealed syringeal structures within the cyst wall and in the cyst cavity. Carcinoembryonic antigen was observed in these syringeal structures but was not specifically stained in the cyst wall cells by immunohistochemistry. The cytokeratin composition of the cyst wall cells was similar to that of the nonadnexal epidermis.

Aged↗