In Part 1 of the article, Shimizu wrote about some historical events concerning oral tumor and cancer research at Tokyo Medical & Dental University from 1954 till 1970. By this second description, he has noticed that the range of historical items in Part 1 was a little too short for the past years. Then he read again the materials given from Prof. T. Ueno and Pof. H. Nakamura, both of whom are his teachers. Through that, Shimizu found many important things, which were missed to write in the last article 1. Further, according to the materials of Ueno, who gave the author, in 1986, two books written by Prof. Kanamori, the teacher of Ueno, with advice and a precept with his own writing to Shimizu, the author wrote, this time, several items concerning the history of medico-dental development in the Japanese oral tumor fields from 1900 till 1972,
As for the case, he stressed, especially, the power and influences of Heizo NAKAMURA and Tadashi UENO, who have positively covered the present situation of Japanese oral tumor surgery till now,
Concerning oral cancer therapies after 1970, which were previously noticed in the Part 1, these would be appeared in the Part 3.

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It is well known that a thyroglossal duct cyst and a lateral cervical cyst are diagnosed by the location as well as the histological findings, and they rarely show malignant change.
We report a case of a papillary adenocarcinoma arising in a thyroglossal duct cyst. The patient was a 56-year-old female who had noticed a mass in the right lateral neck for three months. She had a 40×20×15 mm cystic lesion inside the sternocleidomastoideus. We extracted the mass on a clinical diagnosis of it being a lateral cervical cyst. However, histological examination revealed papillary adenocarcinoma in part of the extracted cyst, and immunohistochemical examination was positive for antithyroglobulin antibodies. Thyroid papillary carcinoma has not been observed for eight years since the operation. Thus, the final diagnosis of the tumor was a papillary adenocarcinoma arising in a thyroglossal duct cyst. This finding suggests that immunohistological identification of thyroglobulin is important to differentiate thyroglossal duct carcinoma from branchiogenic carcinoma.

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Primary intra-osseous carcinoma (PIOC) of the jaw is uncommon and must be excludeed, in the differential diagnosis, from such as bone invasion of gingival cancer, metastatic cancer, cystic disease, and osteomyelitis. However, few studies about that have been reported. Thus, we report three cases of PIOC that we treated, and discuss its clinical and pathological features based on the literature.
Case No. 1: A 64-year-old woman was referred to our department because of swelling of her right cheek on October 16, 1995. This case was diagnosed as PIOC of the mandible. A hemi-manidibulectomy with bilateral neck dissection was performed, following chemotherapy (PEP 40mg total dose) . Neither recurrence nor metastasis has been noted during a five-year follow-up period.
Case No. 2 : A 56-year-old man was referred to our department because of continuous pain in the right side of the mandible; he visited our department on September 13, 1989. This case was diagnosed as PIOC of the mandible. Prior to surgery, he received chemotherapy (PEP 67.5mg total dose) and radiotherapy (19.5Gy total dose) . On November 10, 1989, a hemi-mandibulectomy with ipsilateral neck dissection was done. The patient has been free from the disease for five years.
Case No. 3 : A 51-year-old man, who presented with an enlargement of the hard palate, visited our department on August 20, 1999. He was finally diagnosed as PIOC arising from an odontogenic cyst. We performed a partial maxillectomy on October 4, 1999. This patient has been free from the disease for three years and four months.

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Parotid gland hemangioma is considered to be the most common salivary gland tumor in infants, but it is also occasionally encountered in adults. Forty-two parotid gland hemangioma cases have been described in detail in Japanese from 1911 to 2002, and only six of these were adult cases. We encountered and treated a patient with a hemangioma arising in the parotid gland. A case of cavernous hemangioma affecting the right parotid gland, associated with Behcet's disease and Sjogren syndrome, is presented. A 30-year-old woman was referred to our department on April 12, 2000, because of a painless swelling in the right parotid gland. MRI showed high signals on T2-weighted images. The tumor was excised with the parotid gland under general anesthesia. The pathological diagnosis was a cavernous hemangioma.

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