Prader-Willi syndrome is an uncommon multisystem genetic disorder caused by defects of chromosome 15 (15q11-q13)

The yellow nail syndrome is an uncommon condition characterised by dystrophic nails, pulmonary disturbances and lymph oedema. In Brazil as well as in India, this syndrome has been scarcely described, at least in part due to diagnosis pitfalls related with darker skin pigmentation. A case of adnexal malignancy developing several decades after initial signs of yellow nail syndrome is reported in a 61-year-old Brazilian female admitted for evaluation of peripheral oedema. She reported recurrent sinusitis and bronchitis, and three antecedent pneumonias. Physical examination showed yellow thickened nails and lower limb oedema, and a painless huge adnexal mass. Diverse tumours have been described associated with yellow nail syndrome; however, associations can also occur by chance. The present report attempts to raise the awareness about casual co-existence of malignancy and the syndrome.

Background: Hantavirus pulmonary syndrome (HPS) is an emerging rodent-borne disease in the American continent, characterized by acute respiratory distress and a high case-fatality ratio. The present work describes a case of HPS, with favorable outcome, whose initial features were mistaken for leptospirosis or other less severe acute infections. Methodology: The case of a 32-year-old male with an uneventful course of HPS is reported. He was inadvertently infected at work by exposure to a rodent-contaminated environment in Brasília, Federal District vicinity, during May 2008. Results and Conclusions: Fever, headache and myalgia after exposure to a rodent-contaminated environment raised clinical suspicion. Noncardiac pulmonary edema, hydrothorax, neutrophilia with band forms 26%, high hematocrit, thrombocytopenia, and elevated liver enzymes were observed. Leptospirosis and dengue were the main differential diagnoses because both pathogens are endemic in the area. Hantavirus IgM antibody-capture ELISA was positive, while tests for dengue, leptospirosis and yellow fever were negative. The prognosis for HPS is ominous and misdiagnoses may increase mortality. Better chances of survival depend on prompt intensive care support. Reports of moderate or less typical cases can raise the suspicion index among primary care and hospital-based physicians about this uncommon but severe condition that often affects previously healthy young individuals from developing countries, and subjects who interact with rodent-infested environments in North America. High awareness of HPS allowed successful management of the patient, even before establishing the diagnosis, by serological tests at the reference laboratory of the Ministry of Health. Clinical suspicion favored warning local health authorities about a new case of HPS.