Renal transplantation in Birt-Hogg-Dubé syndrome: should we?

Background

Birt-Hogg-Dubé (BHD) Syndrome is a rare genodermatosis caused by a mutation on folliculin gene, with a strong link to renal cancer. To date few patients with such condition have reached dialysis stage, as nephron-sparing surgery is usually possible at the time of diagnosis. To our best knowledge no patient with BHD syndrome has been submitted to renal transplantation.

Case presentation

We report the case of a woman diagnosed with multifocal bilateral renal cell carcinoma that underwent bilateral radical nephrectomy and was started on a regular hemodialysis program at the age of 29. While on hemodialysis program she was diagnosed clinically with BHD syndrome and molecular testing confirmed an heterozygous mutation on FLCN gene. The patient has been kept on surveillance program for 2 years with no clinical complications from the genetic syndrome and in complete remission from renal cancer. Though there has not been any report of a patient with BHD being transplanted, risks and benefits for this patient were weighted. She has been considered apt by the transplant team and is currently waitlisted for cadaveric renal transplantation.

Discussion

It is a matter of discussion which should be cancer-free period for anephric patients with an inherited cancer syndrome to be candidates for renal transplant. So far BHD syndrome has not been causally associated with any other neoplastic disorder elsewhere. Accepting cancer biology is very complex and knowledge of the behaviour of this genetic syndrome is limited to a few cases reported worldwide, the authors believe that renal transplantation is the best treatment option for this young patient. The choice of post transplantation immunosuppression is debatable, but considering experience in other inherited cancer syndromes a maintenance scheme with mTOR inhibitor will be favoured.

Bilateral fracture of the pedicle of the second cervical vertebra in the young child

We report the cases of five children, six to eighteen months old, who had bilateral fracture of the pedicles of the second cervical vertebra. The children were treated with gentle cervical traction in mild extension or were maintained in near-anatomical reduction in a Minerva jacket or halo cast. The fractures united in four patients. One patient underwent fusion to stabilize the spine.