Heterotopic Ossification with Intrathyroidal Extramedullary Hematopoiesis in Multifocal Papillary Thyroid Carcinoma: Histopathological Findings and Literature Review.

In recent decades, there has been an increase in the identification of thyroid nodules, both benign and malignant, due to the rise in imaging studies and complementary tests. Among thyroid gland tumors, papillary thyroid carcinoma (PTC) stands out as the most prevalent. Degenerative changes, mainly in the form of nodular goiter, have been recorded, occasionally including areas of calcification and, more rarely, ossification; although the latter seldom progresses to calcinosis.

Liver metastases of colorectal adenocarcinoma with intrahepatic biliary spread pattern: clinical manifestation and importance of immunohistochemical analysis.

Liver metastases of colorectal carcinoma (LMCC) with macroscopic intrabiliary ductal involvement are a rare entity that can clinically and radiologically mimic a cholangiocarcinoma. However, a thorough anatomopathologic and immunohistochemical study of biliary ductal involvement is required because of its distinctive clinical features and relatively indolent biological behavior, reflecting a better prognosis and long-term survival. We present the case of a patient who debuted with LMCC with intrahepatic biliary ductal involvement, whose definitive diagnosis was established by immunohistochemical analysis, showing a characteristic CK7 - /CK20 + pattern.

Retroperitoneal paraganglioma-Is pre operative embolization useful?

Introduction: Paragangliomas (PG) are rare tumors derived from chromaffin cells that are located outside the adrenal gland and are capable of producing catecholamines. The treatment is based on a surgical resection, and there is controversy regarding the usefulness of previously carrying out an embolization and what is the most adequate surgical approach.

Clinical Case: We will present a 17-year-old woman with a retroperitoneal tumour in contact with the aorta and the inferior vena cava, treated with embolization prior to the surgical resection via laparotomy.

Laparoscopic treatment of retroperitoneal cystic mesothelioma. Two cases reported.

Retroperitoneal cystic mesothelioma is a very rare lesion. The pathogeny is unclear and establishing a preoperative diagnosis versus others retroperitoneal cystic lesions is difficult. Thus, with increasing experience in laparoscopic retroperitoneal surgery, the use of this approach for exploration of a retroperitoneal mass of unknown origin may provide an alternative to classic open surgery and all the benefits of laparoscopy.

[Hepatic myelolipoma. Diagnosis and treatment].

Myelolipoma is a very uncommon tumor and is extremely rare in the liver. Patients are usually asymptomatic and preoperative diagnosis is often difficult. We report a new case of hepatic myelolipoma and review all the cases previously reported in the literature.

[Complications due to spilled gallstones and surgical clips left in the abdomen during laparoscopic cholecystectomy].

The presence of biliary gallstones and surgical clips in the abdominal cavity after a laparoscopic cholecystectomy can cause complications, which even though they are uncommon, can be serious. We carried out a review of the various complications, their incidence, related risk factors, ways to deal with them and recommendations to reduce morbidity associated with the presence of ectopic material (gallstones and surgical clips) in the peritoneum.

[Laparoscopic splenectomy due to torsion of a wandering spleen].

Wandering spleen is an uncommon entity, characterized by the anomalous position of the spleen, caused by the absence or laxity of its suspensory ligaments. The most common symptoms are usually due to intermittent or complete torsion of the splenic pedicle with subsequent infarction. We report a case of torsion of a wandering spleen.