RESUMO Descrição do relato de caso de uma paciente com distrofia endotelial de Fuchs submetida a transplante de córnea, realizado pela técnica DMEK, que evoluiu com quadro de dor súbita, paroxística, em região frontotemporal, no pós-operatório. Devido ao quadro oftalmológico da paciente, o médico assistente acreditava em possível rejeição do enxerto, negligenciando a dor. Mesmo após sucesso do segundo transplante, realizado devido à falência primária, as dores incapacitantes persistiam, e nenhuma conduta, por parte do médico, foi realizada. Após anos de investigação, mediante consultas com diversos especialistas, concluiu-se que a paciente apresentava um quadro de neuralgia do nervo trigêmeo que não tinha sido tratada desde a realização do procedimento cirúrgico. Além disso, apresentava uma série de consequências psicossociais. Portanto, torna-se imprescindível entender que a neuralgia do nervo trigêmeo é um possível desfecho do transplante de córnea, e seus sintomas não devem ser negligenciados por parte do médico assistente, contribuindo para melhores condutas para os pacientes transplantados.

ABSTRACT Description of a patient with Fuchs endothelial dystrophy submitted to a corneal transplant, performed by Descemet membrane endothelial keratoplasty, which evolved with sudden, paroxysmal pain in the frontotemporal region, postoperatively. Due to the ophthalmologic picture of the patient, the attending physician believed in possible rejection of the graft, neglecting the complaint of pain. Even after a successful second transplant, performed due to primary failure, disabling pain persisted and the physician did not manage it. After years of investigation, consulting with several specialists, it was concluded the patient presented trigeminal neuralgia that had not been treated since the surgical procedure. In addition, it led to several psychosocial consequences. Therefore, it is essential to be aware trigeminal neuralgia is a possible outcome of corneal transplantation, and its symptoms should not be neglected by the attending physician, thus contributing to better management for transplanted patients.

Ocular toxoplasmosis can result in recurrent uveitis. Studies have shown that a correlation between active ocular toxoplasmosis and the presence of anti-Toxoplasma gondii secretory IgA (SIgA) in tears. This study compares anti-T. gondii SIgA levels in patients' tears during the acute and inactive phases of toxoplasmic uveitis. Twenty-nine positive tear specific SIgA for T. gondii patients with acute toxoplasmic uveitis were selected and were followed-up for at least two years, when the anti-T. gondii SIgA tears levels were determined. Specific SIgA for T. gondii was negative in 22 patients (75.86%) and positive in seven patients (24.13%) of whom six (85.7%) were followed over three years. Average SIgA levels during the acute phase are 1.54 and decrease significantly to 0.72 (p = 0.0001) during the inactive phase of disease. Because anti-T. gondii SIgA in the tear is negative in 75.86% of patients after the acute phase of infection, T. gondii SIgA levels may be used as a complementary diagnostic marker for active ocular toxoplasmosis.

Toxoplasma gondii causes posterior uveitis and the specific diagnosis is based on clinical criteria. The presence of anti-T. gondii secretory IgA (sIgA) antibodies in patients' tears has been reported and an association was found between ocular toxoplasmosis and the anti-T. gondii sIgA isotype in Brazilian patients. The purpose of this study was to provide an objective validation of the published ELISA test for determining the presence of anti-T. gondii sIgA in the tears of individuals with ocular toxoplasmosis. Tears from 156 patients with active posterior uveitis were analysed; 82 of them presented characteristics of ocular toxoplasmosis (standard lesion) and 74 patients presented uveitis due to other aetiologies. Cases of active posterior uveitis were considered standard when a new inflammatory focus satellite to old retinochoroidal scars was observed. The determination of anti-T. gondii sIgA was made using an ELISA test with crude tachyzoite antigenic extracts. Tears were collected without previous stimulation. Detection of sIgA showed 65.9% sensitivity (95% CI = 54.5-74.4), 71.6% specificity (95% CI = 59.8-81.2), a positive predictive value of 72% (95% CI = 60.3-81.5) and a negative predictive value of 65.4% (95% CI = 54.0-75.4). sIgA reactivity was higher in the tears of patients with active posterior uveitis due to T. gondii (p < 0.05). The test is useful for differentiating active posterior uveitis due to toxoplasmosis from uveitis caused by other diseases.