title: Bone and soft tissue tumors presenting as sciatic notch dumbbell masses: A critical differential diagnosis of sciatica.
abstract: OBJECTIVE
  To study the clinical findings and characteristic features in sciatic notch dumbbell tumors (SNDTs).
  
  
  METHODS
  We retrospectively reviewed the clinical outcomes and characteristic features of consecutive cases of SNDTs (n= 8).
  
  
  RESULTS
  Buttock masses occurred in three patients with SNDT (37.5%). Severe buttock tenderness and pain at rest were observed in seven patients with SNDTs (87.5%). Remarkably, none of the patients with SNDTs experienced back pain. Mean tumor size was 8.4 ± 2.0 cm (range, 3.9 to 10.6 cm) and part of the tumor mass was detected in 2 patients in the sagittal view of lumbar magnetic resonance imaging (MRI).
  
  
  CONCLUSIONS
  The clinical information regarding to SNDTs is scarce. The authors consider that above mentioned characteristic findings may facilitate the suspicion of pelvic pathology and a search for SNDT by MRI or computed tomography should be considered in patients presenting with sciatica without evidence of spinal diseases.
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Yoshihiro
authors: Y
authors: Matsumoto
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Tomoya
authors: T
authors: Matsunobu
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Katsumi
authors: K
authors: Harimaya
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Kenichi
authors: K
authors: Kawaguchi
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Mitsumasa
authors: M
authors: Hayashida
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Seiji
authors: S
authors: Okada
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Toshio
authors: T
authors: Doi
authors: Yoshihiro Matsumoto, Tomoya Matsunobu, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Seiji Okada, Yukihide Iwamoto, Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
authors: Yukihide
authors: Y
authors: Iwamoto
keywords: Bone and soft tissue tumor; Differential diagnosis; Dumbbell masses; Sciatic notch; Sciatica