Espondilodiscitis multifocal y meningoencefalitis por Staphylococcus aureus en un paciente inmunocomprometido / Multifocal spondylodiscitis and meningoencephalitis due to Staphylococcus aureus in an immunocompromised patient

Spondylodiscitis is a rare diagnosis, but its incidence has increased in recent years. It represents 3-5% of osteomyelitis, and the multifocal affliction is rare as it occurs in 4-8% of all spondylodiscitis. The occurrence of meningoencephalitis associated with spondylodiscitis is also a rare association. We present the case of a 54-year-old woman diagnosed with multifocal spondylodiscitis complicated with meningoencephalitis and intracanal and paravertebral abscess with identification in blood cultures of Staphylococcus aureus. Immunosuppression with infliximab was identified as a risk factor. The patient underwent targeted antibiotic therapy, opting for the conservative strategy due to the surgical risk. There was a positive evolution with imaging resolution of the intracanal abscess. This case is of particular importance due to its rarity of frequency and considering the etiological agent and the low frequency of this infection in patients under anti-TNF-alpha therapy. (AU)

La espondilodiscitis es un diagnóstico poco frecuente, pero su incidencia ha aumentado en los últimos años. Representa el 3-5% de las osteomielitis, y la afección multifocal es rara, ya que se da en el 4-8% de todas las espondilodiscitis. La aparición de meningoencefalitis asociada a espondilodiscitis también es una asociación poco frecuente. Presentamos el caso de una mujer de 54 años diagnosticada de espondilodiscitis multifocal complicada con meningoencefalitis y absceso intracanal y paravertebral con identificación en hemocultivos de Staphylococcus aureus. Se identificó como factor de riesgo la inmunosupresión con infliximab. La paciente fue sometida a antibioterapia dirigida, optándose por la estrategia conservadora debido al riesgo quirúrgico. Hubo una evolución positiva con resolución imagenológica del absceso intracanal. Este caso es de especial importancia por su escasa frecuencia y teniendo en cuenta el agente etiológico y la baja frecuencia de esta infección en pacientes bajo terapia anti-TNF-alfa. (AU)

Pernicious Anemia With Spuriously Normal B12 Levels.

We present a 29-year-old man admitted to our hospital with fatigue for two months of duration and recent palpitations, lightheadedness, blurred vision and nausea. Workup showed pancytopenia with severe macrocytic anemia, laboratory and blood smear features of hemolysis, low reticulocyte percentage and a negative direct Coombs test. B12 and folate levels were normal. As bone marrow aspirate was suggestive of megaloblastic anemia and upper endoscopy showed atrophic gastritis, we ordered homocysteine (elevated) and intrinsic factor (IF) antibodies (positive). The workup led to the diagnosis of pernicious anemia with spuriously normal B12 levels. Replacement therapy allowed a rapid recovery. We highlight that the presence of IF antibodies can interfere with the competitive binding assays commonly used to measure B12 levels.

IgA vasculitis with severe renal manifestation.

IgA vasculitis is a rare systemic vasculitis in adults, frequently more severe than in paediatric age. It manifests with cutaneous, articular, gastrointestinal and renal involvement.We present a case of a man in his 40s diagnosed with IgA vasculitis with cutaneous, joint, gastrointestinal and renal disease. Significant proteinuria and renal biopsy findings demonstrating crescentic glomerulonephritis led to the onset of early immunosuppression with corticoid and cyclophosphamide. This case report reflects a case of more severe renal impairment due to IgA vasculitis with good outcome with the chosen therapy. The findings in the renal biopsy after treatment supported the good response to the chosen immunosuppression.

Acquired haemophilia A associated to autoimmune thyroiditis and pangastritis.

Acquired haemophilia A is a rare condition defined by the presence of coagulation inhibitors, which are autoantibodies directed against factor VIII that interfere with its activity. We report a case of a 69-year-old woman that presented with knee haemarthrosis followed by spontaneous retroperitoneal haematoma. On coagulation studies, she presented normal prothrombin time with prolonged activated partial thromboplastin time non-correcting on mixture test, low titers of factor VIII and was detected factor VIII inhibitor that led to diagnosis of acquired haemophilia A. She was managed with supportive measures to control haemorrhage and immunosuppressive therapy to eradicate inhibitors, initially with corticosteroids, with partial transitory response, after which she developed new spontaneous haematomas. Rituximab was started at that time, with a good outcome. The additional aetiological study identified autoimmune thyroiditis and autoimmune pangastritis, an association rarely described in literature.