[Adverse reactions to skin tests and immunotherapy in the practice of Mexican allergologists].

Background: Immunotherapy is the only curative treatment recommended for allergic rhinoconjunctivitis and asthma, in which small amounts of allergen are administered sublingually or subcutaneously until the maximum tolerated dose has been reached. However, local or systemic adverse reactions (AR) -rarely even fatal- an occur. In Mexico there is no nationwide data on adverse reactions.

[Perianal Paget's disease].

Perianal Paget's disease is a rare entity and often the recognition is delayed because of previous erroneous diagnoses. Biopsy is the only means that provides diagnosis. Treatment should be radical as the disease often recurs and is associated with other malignancies.