Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) is a new operation for morbid obesity based on the biliopancreatic diversion in which a sleeve gastrectomy is followed by an end-to-side duodeno-ileal diversion. The preservation of the pylorus makes possible the reconstruction in one loop, which reduces operating time and needs no mesentery opening. We review the results obtained on the first 50 operated patients with 1 to 3 years follow-up. Eighteen men and 32 women with a mean BMI of 44 kg/m(2) were operated on. Hypertension was present in 50%, sleep apnea in 30%, hypertriglyceridemia in 60% and hypercholesterolemia in 43%.There were 27 type two diabetics, most of them on insulin therapy. There were two gastric staple-line leaks and one long-term subphrenic abscess. Follow-up is complete for 98% of the patients. Excess weight loss reached 94.7% at 1 year, and it was maintained over the second and third year. At 1 year, mild anemia has been detected in 10% of the cases. Albumin concentration was under normal levels in 8% of the patients in the first postoperative year, but all patients recovered to normal levels by the third postoperative year. All diabetic patients have normalized glucose or HbA1c levels after the sixth postoperative month with no need of anti-diabetic therapy. SADI-S is a promising operation which offers excellent weight loss and metabolic results. The elimination of one anastomosis reduces operative time and decreases the possibility of surgically related complications.

The emergence and spread of new variants of SARS-CoV-2 has produced enormous interest due to their possible implication in the improved transmissibility of the virus, their consequences in the individual evolution of the infection, as well as in the possible escape from the immunity generated by the current vaccines. The variants that attract most attention are those of public health concern, including B.1.1.7 (UK), P.1 (Brazilian) and B.1.351 (South African). This list is extended by the variants of interest that emerge and are expanding in certain countries but are found sporadically in others, such as B.1.427 and B.1.429 (Californians) or B.1.617 (Indian). Whole genome sequencing or strategies specifically targeting the spicule gene are used in the microbiology laboratories for characterization and detection. The number of infected individuals, the sanitary situation of each country, epidemiological measures and vaccination strategies influence its dispersion and new variants are expected to emerge. This emergence can only be avoided today by increasing the vaccinated population in all countries and by not relaxing epidemiological containment measures. It is not excluded that in the future it will be necessary to revaccinate against new variants.

The precocity and efficacy of the vaccines developed so far against COVID-19 has been the most significant and saving advance against the pandemic. The development of vaccines has not prevented, during the whole period of the pandemic, the constant search for therapeutic medicines, both among existing drugs with different indications and in the development of new drugs. The Scientific Committee of the COVID-19 of the Illustrious College of Physicians of Madrid wanted to offer an early, simplified and critical approach to these new drugs, to new developments in immunotherapy and to what has been learned from the immune response modulators already known and which have proven effective against the virus, in order to help understand the current situation.

Predictions for a near end of the pandemic by the World Health Organization should be interpreted with caution. Current evidence indicates that the efficacy of a fourth dose of classical mRNA vaccines (BT162b2 or mRNA-1273) is low and short-lived in preventing SARS-CoV-2 infection in its predominant variant (Omicron). However, its efficacy is high against severe symptomatic infection, hospitalization and death. The new vaccines being introduced are bivalent and active against the Omicron variants. Potential new vaccines to be introduced in the coming year include a vaccine based on a recombinant protein that emulates the receptor binding domain of the Spike protein under development by the Spanish company Hipra, as well as vaccines for nasal or oral administration. Available information suggests that vaccines against COVID-19 can be administered in association with influenza vaccination without particular complications. New drugs against COVID-19, both antiviral and anti-inflammatory, are under investigation, but this does not seem to be the case with monoclonal antibodies. The indication to use masks in some circumstances will be maintained next year in view of the accumulation of scientific data on their efficacy. Finally, the long COVID or Post-COVID syndrome may continue to affect a very high proportion of patients who have had the disease, requiring combined diagnostic and therapeutic resources.

Epithelioid hemangioendothelioma (EH) is a rare tumor of vascular origin, which occurs at sites such as soft tissues, liver, or lung, and has a highly unpredictable malignant potential. It is an intermediate entity between well-differentiated hemangioma and angiosarcoma. We present two cases of this rare disease in which the tumor was detected fortuitously and the definitive diagnosis was based on histological evidence. Both our cases are highly illustrative of the two ways in which hepatic EH can present (nodular or diffuse) and of its diagnostic and therapeutic management. Neoplastic cells expressed the factor VIII-related antigen, CD31 or CD34. Treatment was surgical resection in one patient and liver transplant in the other. Although EH of the liver has a better prognosis than other hepatic neoplasms, conservative treatment is not recommended. Our cases highlight the importance of a histological diagnosis to avoid it being mistaken for another entity.