[Case report of Guillain-Barré Syndrome after COVID BNT162b2 mRNA vaccine].

Introduction: Guillain-Barré syndrome (GBS) is a rare immune disorder that affects peripheral nerves and the cause is not known completely, but it is associated with infections by viruses or bacteria.

Case Report: We report the case of a 23-year-old male patient, a health student, who start 24 hours after received the second dose of COVID-19 vaccine, with proximal weakness of the right upper limb, later on the left side with descending and distal progression.

Discussion: GBS cases related to COVID-19 vaccines have been published, the most common being BNT162b2, which is mRNA, there are also cases published after the AZD1222 (ChAdOx1) vaccine, which is a non-replicating viral vector.

[Historical, clinical and epidemiological aspects of poliomyelitis in Mexico (1946-1960)].

Poliomyelitis emerged in Europe as an epidemic disease at the end of the 19th century. During the thirties of the twentieth century it reached great intensity in the United States and Canada, but it was after the Second World War when the disease became a serious world public health problem, which punished several countries of the world, including Mexico. Poliomyelitis is a very contagious viral disease that invades the central nervous system (destroys motor neurons) that frightened the Mexican population in the first half of the twentieth century, not so much by high mortality and morbidity figures but by its paralytic sequels, like the disability, and by the fact that it affected one of the most vulnerable population groups: children.

[On the first occupational medicine initiatives in Mexico: The Real del Monte miners’ hospital].

Despite the legislation of Otto von Bismarck (1815-1898) on social security rights formulated in 1883 in Germany where it is stated that it is the duty of the State to promote the welfare of all members of society, particularly the weakest and most needy, using the means available to them, and the proposals of laws against accidents issued on April 30, 1904 in the State of Mexico in 1904, in the Mexico of the Porfirio Díaz era, providing workers with formal medical care was not contemplated, except in the case of some railway companies, hospitals for the care of patients with occupational diseases were not built. One of these exceptions was the Hospital del Mineral del Real del Monte de Pachuca, founded in the late nineteenth century and after the mining company passed to the Americans in 1906, it was agreed that the company acquired the hospital and equated it with the medical and surgical advances of the time for immediate care of injuries, especially of the orthopedic type, which enabled not only the healing of wounds, but also rehabilitation. This hospital is one of the oldest in Mexico with regard to three disciplines: orthopedics, occupational medicine and rehabilitation.

Prevalence of extra-articular manifestations in patients with ankylosing spondylitis: a systematic review and meta-analysis.

Objectives: Uveitis, psoriasis and inflammatory bowel disease (IBD) are common extra-articular manifestations (EAM) in patients with ankylosing spondylitis (AS); however, summary data of reported prevalence are lacking. The aim of the present study was to summarise the prevalence of EAMs among patients with AS and to identify underlying factors to explain potential heterogeneity of prevalence.

Methods: A systematic literature search was performed (Medline, Embase and Cochrane Library) to identify relevant articles.

[Maxillary osteosarcoma. A woman with 12 years of survival].

Background: The osteosarcomas of the jaws are infrequently tumors. The accelerated bone growthing and the swelling with nervous sensibility alterations are suggestive of malignancy. The diagnosis is established only by the histological study and the standard treatment used is surgery with a poor survival prognosis of only 25% at five years for those cases with margins free of tumor.

[Study of 103 cases of odontogenic cysts].

Objective: To describe characteristics of odontogenic cysts in a Mexican population.

Methods: A retrospective study of 103 odontogenic cysts in 86 patients was done. The data were obtained from files of the Pathology Department of a General Hospital.

[The effect of mycophenolate mofetil and azathioprine on gingival enlargement associated with cyclosporin A use in kidney transplant patients].

Aim: To assess gingival overgrowth prevalence and severity in a group of kidney transplant (KT) patients, and analyze the effect of immunosuppressor drugs Cyclosporin A (CsA), Tacrolimus (Tac), Sirolimus (Siro), Azathioprine (Aza) and Mofetil Mycophenolate on this complication.

Methods: Gingival overgrowth presence and severity was classified, and the impact of immunosuppressor drugs, age, oral hygiene, verapamil and nifedipine on this condition was analyzed by multiple logistic regression.

Results: 172 KT pts.