We report a 65-year-old man who presented with a Merkel cell carcinoma on his right ear, a small satellite nodule and regional lymph node metastases. No treatment was given because of his generally poor state of health. Spontaneous regression of all the lesions was observed within a month. Merkel cell carcinoma is a potentially aggressive tumour. Only four cases of spontaneous regression have been reported previously.

The location of hydatid cysts inside pulmonary arteries has been reported only on rare occasions in the literature and is caused, in the majority of cases, by embolization due to the rupture of hydatid cysts located in the heart; more rarely, hematogenous dissemination from a hepatic focus is the cause. We report a case of a 44-year-old patient with hydatid cysts located in both the right and left pulmonary arteries, whose first clinical reference was hemoptysis. The patient had undergone surgery because of a hepatic hydatid cyst 5 months previously. The importance of this case lies in the infrequent bilateral location in both pulmonary arteries and in the absence of intracardiac hydatid cysts.

Intestinal microsporidiosis has been associated traditionally with severely immunocompromised patients with AIDS. We describe two new cases of intestinal microsporidiosis due to Enterocytozoon bieneusi in human immunodeficiency virus -negative adults. Both patients presented with chronic nonbloody diarrhea, and one had intestinal lymphangiectasia as well. Intestinal microsporidiosis was diagnosed by evaluation of stool samples, and the specific species was determined by use of polymerase chain reaction (PCR) in duodenal biopsy specimens. To our knowledge, this is the first report of confirmation of E. bieneusi in the intestinal epithelium of HIV-negative individuals by use of PCR in duodenal biopsy specimens. Cases of intestinal microsporidiosis in HIV-negative individuals reported in the English-language literature are reviewed. These two new cases along with those described previously corroborate the need to evaluate for microsporidia in HIV-negative individuals with unexplained diarrhea.Several clinicoepidemiological studies have shown that Enlast 20 years. In 1991, intestinal lymphangiectasia, a generalized congenital disorder of the lymphatic system that originates terocytozoon bieneusi is the intestinal microsporidian encountered most frequently in patients with AIDS [1 -3]. In addition, in an immunodeficient setting, was diagnosed. In 1996 he was admitted to the hospital for evaluation of diarrhea, three loose the organism is becoming increasingly common in immunocompetent individuals [2]. To date, there are reports of only bowel movements per day, and a 6-month history of right pretibial edema. Laboratory studies revealed the following valnine children [4, 5] and five adults [6 -10], all HIV-negative, who have had intestinal microsporidiosis diagnosed, and ues: lymphocyte count, 0.8 1 10 9 /L; CD4 cell count, 0.32 1 10 9 /L; CD8 cell count, 0.12 1 10 9 /L; CD4-CD8 ratio, 2.6; total E. bieneusi was identified in stool samples from 11 of them; species-level identification was not attained for the other three protein level, 40 g/L; IgG level, 1.3 mg/mL; IgA level, 0.71 mg/mL; and IgM level, 0.17 mg/mL. Delayed-type hypersensipatients [4, 8]. We report two new cases of intestinal microsporidiosis due to E. bieneusi in HIV-negative adults from Vitoria tivity skin tests showed normal responses. Serologies for antibodies to HIV-1 and HIV-2 were negative. Results of the Van (Alava, Spain), identified in stool samples as well as duodenal biopsy specimens. To our knowledge, these are the first cases de Kamer, Schilling, and D-xylose tests were indicative of intestinal malabsorption. Esophagogastroduodenoscopy of confirmation of E. bieneusi by use of PCR in the duodenal biopsy specimens of HIV-negative individuals with intestinal showed edematous folds and nonoverelevated erythematous symptoms.lesions in the third duodenal portion. Repeated routine stool cultures for detection of pathogenic bacteria (including mycobacteria) and ova and parasites and a specific Case Reports monoclonal antibody test for Cryptosporid...

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