Elsevier

Joint Bone Spine

Volume 76, Issue 3, May 2009, Pages 296-300
Joint Bone Spine

Case report
Late Mycobacterium bovis spondylitis after intravesical BCG therapy

https://doi.org/10.1016/j.jbspin.2008.10.011Get rights and content

Summary

A 72-year-old man presented with a 6-month history of low back and leg pain. Past medical history revealed transurethral resection of bladder cancer followed by multiple intravesical BCG instillation 12 years ago. Imaging studies of the thoracolumbar spine showed osteolysis of the L3 and L4 vertebrae and the associated intervertebral disc space, and a large soft tissue mass with signal abnormalities suggesting of an abscess. CT-guided needle biopsy showed Mycobacterium bovis infection. A triple anti-tuberculous chemotherapy regimen including isoniazid, rifampicin, and ethambutol was administered for 12 months. Surgical treatment included drainage of the abscess and L2–L5 spinal instrumentation and fusion. Intravesical BCG therapy may be complicated by late disseminated disease to the bone even many years after initial BCG therapy. Patients having BCG therapy should be closely evaluated thereafter for the possibility of hematogenous spread of mycobacteria to distant sites.

Introduction

Bacillus Calmette–Guérin (BCG) is an attenuated derivative of the virulent strain of Mycobacterium bovis. Until its use in current medical practice as a vaccine and for the prevention of superficial bladder cancer recurrence through intravesical instillation, M. bovis was a forgotten pathogen, accounting for less than 0.1% of all mycobacterial isolates [1], [2], [3]. However, since then, its use has not been without complications. The incidence and the variety of these complications depend on the particular strain, dose, and route of administration; although rare, musculoskeletal complications including arthralgias, reactive arthritis and osteoarticular infections have been reported following vaccination and intravesical BCG therapy [1], [4], [5], [6], [7], [8].

In this article, we present a case of late M. bovis spondylitis that occurred 12 years after intravesical BCG treatment in an immunocompetent patient with carcinoma of the bladder.

Section snippets

Case report

A 72-year-old man was admitted to the authors' institution with a 6-month history of low back and leg pain, anorexia and a 5.2-kg of body weight loss. There was no history of trauma, fever, night sweats, or cough. Past medical history revealed degenerative spondylosis of the lumbar spine, benign hyperplasia of the prostate gland, and bladder cancer diagnosed and treated 12 years ago by six cycles of intravesical BCG instillations at weekly intervals. Fifteen months after the initial diagnosis

Discussion

Since its introduction in the 1970s, intravesical BCG immunotherapy has been a major breakthrough for the treatment of superficial bladder cancer and in situ carcinomas, with low risk of adverse effects, most of which are localized and self-limited. The typical scheme of induction chemotherapy for bladder cancer consists of six bladder instillations of 2 h each, administered at weekly intervals [1], [2], [3], [5], [9], [10].

As the application of BCG intravesical immunotherapy continued to

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