Masanobu Ishiguro

Sentinel lymph node navigation surgery in Paget's disease of the vulva.

A 78-year-old woman with vulvar Pagets disease was examined with lymphoscintigraphy. Neither regional nor distant metastases nor inguinal or femoral lymph node metastases were evident clinically. Sentinel lymph nodes were identified before and during operation in both groin areas. The patient underwent selective sentinel lymph node sampling with a hand-held gamma probe and local vulvectomy. Histopathologic examination of the specimen revealed intraepithelial Pagets disease, and there was no evidence of cancer (stage T2N0M0). Postoperative lymphedema did not occur. The sentinel lymph node procedure for vulvar Pagets disease may be a promising technique for minimally invasive surgery.

Exposure for medical staff from patients during/after ⁸⁹Sr therapy (The 12th International Conference on Radiation Shielding (ICRS-12) and the 17th Topical Meeting of the Radiation Protection and Shielding Division of ANS (RPSD-2012)) -- (Radiation Protections)

89 Sr therapy patients. The Hp(10) for medical workers was measured using personal dosimeters and was found to be <1 μSv during the measurement period. Hp(0.07) for medical workers did not exceed 5 μSv per case during routine work, although the dose on the patients skin surface was about 20 times that on the medical staff. To investigate the contribution of electrons to the measured dose, the dose on the patients skin surface as obtained from uniformly distributed 89 Sr in a similar MIRD phantom was calculated using EGS5 code. The peak energy of the incident photons was approximately 0.6 MeV. The estimated Hp(10) and Hp(0.07) doses for the medical staff were 0.43 and 91 μSv/h, respectively. The contribution of electrons to the calculated Hp(0.07) was approximately 200 times that of photons. Thus, the high Hp(0.07) for medical staff is attributed to the strong contribution of electrons.Personal dose equivalent, Hp(10) and Hp(0.07) doses were measured using an ionization chamber and personal electric dosimeters to estimate the exposure dose for medical staff members and carers as received from Sr therapy patients. The Hp(10) for medical workers was measured using personal dosimeters and was found to be <1 μSv during the measurement period. Hp(0.07) for medical workers did not exceed 5 μSv per case during routine work, although the dose on the patient’s skin surface was about 20 times that on the medical staff. To investigate the contribution of electrons to the measured dose, the dose on the patient’s skin surface as obtained from uniformly distributed Sr in a similar MIRD phantom was calculated using EGS5 code. The peak energy of the incident photons was approximately 0.6 MeV. The estimated Hp(10) and Hp(0.07) doses for the medical staff were 0.43 and 91 μSv/h, respectively. The contribution of electrons to the calculated Hp(0.07) was approximately 200 times that of photons. Thus, the high Hp(0.07) for medical staff is attributed to the strong contribution of electrons.