[The interpretation of a negative intradermal reaction to tuberculin in a case of tuberculous lymphadenitis].

This work aims at describing a particular case of tuberculous lymphadenitis with negative tuberculin skin test in a five-year child who has afterwards developed Hodgkin disease. BK presence is initially demonstrated through the examination of a first bioptic sample of a lymph-node, then confirmed by the presence in the serum of mycobacterial antigens on the peripheral lymphocytes and monocytes. Nine months later the second bioptic sample puts in evidence the presence of Reed-Sternberg cells. The follow-up of our patient took place at the Pediatric Department of the University of Rome "La Sapienza" and lasted an overall period of twenty days. The child was hospitalized twice and underwent a large number of radiological and laboratory tests. The therapy consisted only of medical specific treatment. Our study results lead us to evaluate the presence of immunological suppressive mechanisms in some particular tuberculosis cases, justifying the tuberculin skin-test negativity. When Hodgkin's disease has turned up, it has been too difficult to outline a precise temporal sequence of events, we could only advance hypothesis.