The Authors refer their experience of a patient operated for adenoma of the inferior parathyroid of left lobe associated to a limphoadenopathy from HD. Diagnostic and therapeutical approach are described. The literature of these last decades reports a single case with similar characteristics, but not with the same association. Numerous neoplasias associated more frequently with parathyroid adenoma are mentioned and the probable causes of this association. Although the associations with other affections of the hemolymphopoietic system are relatively frequent, the causes of the rarity of the association between parathiroid adenoma and HD remain unkown.