Author(s)

Masatoshi Morimoto, Mitsuhiko Takahashi, Nori Sato, Toshihiko Nishisho, Seiko Kagawa, Eiji Kudo, Shoichiro Takao, Natsuo Yasui

Department of Human Pathology, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan.
Department of Orthopaedic Surgery, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan.
Department of Radiology, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan..

A foreign body granuloma is a mass lesion consisting of a foreign body with host reaction. Its diagnosis is not always easy in respect of its similarity to soft tissue sarcoma. The most common foreign body is surgical sponge which can be detectable macroscopically. We present a foreign body granuloma in the left buttock caused by microscopic surgical materials that developed into a large lesion. An 80-year-old man with a history of surgery for dislocation of the left hip 20 years earlier, presented with a slowly growing mass that had expanded rapidly over the preceding 2 months. Histological examination revealed organizing granulation tissue surrounding the scattered foreign materials. One should be aware of foreign body granuloma at previously operated sites even without a retained macroscopic gauze sponge.

Expanding Hematoma; Foreign Body Granuloma; Histologic Examination; Magnetic Resonance Imaging

M. Morimoto, M. Takahashi, N. Sato, T. Nishisho, S. Kagawa, E. Kudo, S. Takao and N. Yasui, "Expansively Hemorrhagic Foreign Body Granuloma at the Pelvis Caused by Microscopic Materials," Open Journal of Orthopedics, Vol. 2 No. 1, 2012, pp. 1-5. doi: 10.4236/ojo.2012.21001.