Hidehiko Matsumoto

Publications (2)1.84 Total impact

• Article: Human papillomavirus is frequently detected in gefitinib-responsive lung adenocarcinomas.

  Michihiro Baba, Andres Castillo, Chihaya Koriyama, Masakazu Yanagi, Hidehiko Matsumoto, Shoji Natsugoe, Karem Y Shuyama, Noureen Khan, Michiyo Higashi, Tetsuhiko Itoh, Yoshito Eizuru, Takashi Aikou, Suminori Akiba
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  ABSTRACT: A number of studies have reported the presence of human papillomavirus (HPV) in lung carcinoma. Interestingly, its detection rate appears to differ histologically and geographically. The present study examined 30 adenocarcinomas and 27 squamous cell carcinomas of the lung in a southern area of Japan, and detected high-risk HPV genome in 9 (30%) adenocarcinomas and 2 (7%) squamous cell carcinomas, using PCR with SPF10 primers and INNO-LiPA HPV genotyping assay. The difference of HPV detection rates in adenocarcinomas and squamous cell carcinomas was statistically significant (P=0.044, Fisher's exact test). HPV-16 was the most prevalent HPV genotype, and was detected in 27% (8/30) of adenocarcinomas and in 7% (2/27) of squamous cell carcinomas. High-risk-HPV positive carcinomas had decreased proportions of pRb (P=0.107) and significantly increased proportions of p16INK4a expressing cells (P=0.031) when compared to HPV-negative lung carcinomas. All HPV-16-positive cases were considered to have an integrated form of HPV-16 but its viral load was low (geometric mean = 0.02 copy per cell). In 20 additional adenocarcinomas treated with gefitinib, a tyrosine kinase inhibitor specific for epidermal growth factor receptor, the presence of HPV was examined. Note that East Asian ethnicity is a predictive factor of gefitinib response. High-risk HPV genome was found in 75% (6/8) of adenocarcinomas with complete or partial response to gefitinib but was not found in the remaining 12, which did not respond to gefitinib. In conclusion, the present study suggests that high-risk HPV may be more strongly related to adenocarcinomas, particularly gefitinib-responsive adenocarcinomas, when compared to squamous cell carcinomas. However, its low viral load makes it difficult to determine the etiological significance of these findings.
  Oncology Reports 04/2010; 23(4):1085-92. · 1.84 Impact Factor
• Article: [A long-term surviving patient with invasive thymoma who underwent radiotherapy and/or resection for chest wall, intrathoracic and intrapelvic recurrent tumors].

  Hidehiko Matsumoto, Masakazu Yanagi, Masaharu Kawabata, Takashi Aikou
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  ABSTRACT: A 49-year-old woman with myasthenia gravis who underwent left panpleuropneumonectomy for an invasive thymoma that disseminated through the left thoracic cavity. After six year, radiotherapy was conducted on the recurrent tumor in the left anterior chest wall. Two years later, the recurrent tumors in the intrapelvic and intrathoracic cavities were resected. It was thought that long-term survival was obtained by combining radiotherapy and surgical treatment in view of the patient's general condition, and of the recurrent invasive thymoma present in this case.
  Nihon Kokyūki Gakkai zasshi = the journal of the Japanese Respiratory Society. 05/2002; 40(4):331-6.