Dermatomyositis associated with invasive thymoma

Tetsuro Ago, Minoru Nakamura, Isao Iwata, Hiroyuki Murai, Kazu Okuma, Tomomi Tsuru, Yoshikazu Kaji, Kazuhiro Hayashida, Yoshiyuki Niho

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We report a case of dermatomyositis (DM) associated with invasive thymoma in a 22-year-old woman who was admitted to our hospital complaining of dyspnea which required ventilation support. The reddened elevated scaly eruptions were prominent over the extensor surfaces. Chest X-ray and computed tomography showed mediastinal masses, which were diagnosed as mixed type thymoma. Muscle and skin biopsy specimens were compatible with DM. She was treated with methylprednisolone pulse therapy followed by extended removal of the anterior mediastinal tumor and subsequent radiotherapy. She has had a good clinical course without recurrence of thymoma or DM for more than 3 years. The role of thymoma in the development of DM is discussed. (Internal Medicine 38: 155-159, 1999).

Original languageEnglish
Pages (from-to)155-159
Number of pages5
JournalInternal Medicine
Issue number2
Publication statusPublished - Feb 1999

All Science Journal Classification (ASJC) codes

  • Internal Medicine


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