Light-chain (AL-) amyloidosis is a very rare monoclonal plasma cell disorder with poor prognosis. Rarity of disease has precluded performance of randomized controlled trials comparing various possible treatment modalities. In general, treatment of AL amyloidosis has been adapted from myeloma (MM) therapy. There is large experience with allo SCT in MM. Based on small series of patients and case reports allogeneic transplant has emerged as potentially effective. However, more formal proof of concept of using allogeneic hematopoietic transplantation for treatment of AL Amyloidosis is lacking.

Therefore, given the limitations of conventionally collected registry data (dubious follow-up information and extreme heterogeneity), we developed the: "EBMT non-interventional prospective study on allogeneic transplantation in AL Amyloidosis" which means that transplant centers that already do perform allogeneic transplants for AL Amyloidosis will be encouraged to register their patients with AL Amyloidosis very timely with the EBMT, followed by mandatory submission of EBMT MedB and follow-up forms. The diagnosis of AL Amyloidosis would be based on uniform criteria. All EBMT centres performing allogeneic transplants for Amyloidosis will be invited to participate in this study and centres will be asked to report all AL Amyloidosis cases referred for transplantation using a simple registration form and then to submit Amyloidosis MED B forms for each transplanted patient and follow-up forms as necessary. In conclusion, it should be possible to largely improve the usual quality of registry-based data and to generate scientifically sound knowledge on HSCT in an orphan disease such as AL Amyloidosis.

Short description of the study:

We plan to select those centres within the EBMT that in the past have performed any allogeneic transplant for amyloidosis and ask them to participate by completing a centre registration form. When they have a patient they want to include in this study, the centre will notify the CLWP data office of the planned allogeneic transplant the day before the transplant takes place. For this, the centre can use a patient registration form. Once a patient is included, MED B and regular follow-up are mandatory. Data entry of MED B forms and follow up will be performed in the way that is usual for the centre (either by the centre itself, by the national registry or by the Paris data office). The CLWP data office will keep track of the data submitted.

Research design:

This study is designed as a non-interventional prospective study.

Study Population:

Male or female subjects, 18 years to 60 years, with AL amyloidosis who will receive allogeneic transplantation.

Data to be collected/analysed:

The primary endpoint of this study is efficacy (best hematological remission and organ response) of allogeneic SCT in patients with AL amyloidosis. The secondary endpoints are acute and chronic GvHD, TRM and event-free and overall survival.

Purpose of the non-interventional prospective study request:

The main purpose of this non-interventional prospective study is the evaluation of the effectiveness of allogeneic transplant for AL Amyloidosis. It is planned that results will be presented on scientific symposia and that they will suffice for at least one publication (original article).

Inclusion Criteria:

• AL Amyloidosis, allogeneic HSCT after November 2009, between 18-60 years at time of transplant.

Exclusion Criteria:

• other diagnoses than AL Amyloidosis, auto transplant, transplant before November 2009, younger than 18 or older than 60 at time of transplant.

Male or female subjects, 18 years to 60 years, with AL amyloidosis who will receive allogeneic transplantation