Madelung's Disease: Benign Symmetric Lipomatosis 
Provides an illustrated case study with notes on differential diagnoses.
http://www.idiom.com/~drjohn/Madelung.htmlSoft Tissue Pathology 
Features images of the disease, taken with various scanning techniques.
http://www.cuhk.edu.hk/med/paf/slides/soft/soft.htm
Lipomatosi di Launois-Bensaude (MSL) 
A site, in both Italian and English, providing a historical perspective of Madelung's Disease.
http://digilander.libero.it/camdic/LBS.html
NORD: Madelung's Disease 
The National Organization for Rare Disorders briefly describes this rare disorder (also known as Multiple Symmetrical Lipomatosis, Benign Symmetric Lipomatosis or Lanois-Bensaude Syndrome) and lists further reference information.
http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Madelung%27s%20Disease
Madelung's Disease: Inherited from an Ancient Mediterranean Population? 
Abstract of a case study in the New England Journal of Medicine. Full text available for purchase.
http://content.nejm.org/cgi/content/short/340/19/1481
About Madelung's Disease 
Explains the symptoms and outlines recent advances in treatment.
http://www.aboutmadelungs.com/
OMIM Entry 151800 
Describes the form of Multiple Symmetric Lipomatosis (MSL) characterized by a collar of fat around the neck. The article suggests the cause to be a mitochondrial abnormality.
http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=151800
Osteonecrosis in multiple symmetrical lipomatosis 
The European Association of Radiology presents an illustrated case history from the Royal Liverpool University Hospital.
http://www.eurorad.org/eurorad/case.php?id=1405
www.lipomadoc.org 
Describes several disorders of fatty growths, and includes a link to Madelung's Disease. The site, belonging to Dr. Karen Herbst, describes her research and findings with these diseases.
http://www.lipomadoc.org/index2.html