It is showed the case of a 39 year-old woman with Graves disease and episodes of persistent symptomatic hypoglycemia, with high levels of C-peptide and insulin. The study of images did not show the presence of tumors. Anti-insulin antibodies were positive and the genetic study with the HLA typing class II expressed the alleles of DRB1*04 and DQB1*03* 02 related to disease of Hirata. This would be the first case reported in our country.

A 29 year old male patient with abdominal pain of two months, presence of mass at the level of lower hemiabdomen, a CT scan that showed a septated cystic tumor in the peritoneum and positive Western blot for hydatid disease. It was confirmed the diagnosis of peritoneal hydatid cyst, carrying out medical and surgical management.

It is showed the case of a 39 year-old woman with Graves disease and episodes of persistent symptomatic hypoglycemia, with high levels of C-peptide and insulin. The study of images did not show the presence of tumors. Anti-insulin antibodies were positive and the genetic study with the HLA typing class II expressed the alleles of DRB1*04 and DQB1*03* 02 related to disease of Hirata. This would be the first case reported in our country.

A 29 year old male patient with abdominal pain of two months, presence of mass at the level of lower hemiabdomen, a CT scan that showed a septated cystic tumor in the peritoneum and positive Western blot for hydatid disease. It was confirmed the diagnosis of peritoneal hydatid cyst, carrying out medical and surgical management.

A 63-year-old male patient, diabetic and on insulin treatment, with pain and increased volume at the level of the left anterior hemithorax, with ultrasound and tomography study compatible with collection at the level of the pectoralis major muscle. In the puncture a purulent and fetid material was obtained, confirming the diagnosis of pyomyositis. Streptococcus constellatus was isolated in pus culture.With poor response to initial medical treatment, it required surgical drainage and broad antibiotic coverage.