CASE REPORT
Introdução: os carcinomas hipofisários (CH) são tumores raros caracterizados pela presença de metástases sistêmicas ou no sistema nervoso central de um adenoma hipofisário prévio. A incidência estimada é inferior a 0,5% dos tumores hipofisários sintomáticos. Os tipos mais comuns são os tumores de corticotrofina e prolactina, seguidos pelos carcinomas de GH e gonadotrofinas. A literatura apresenta cerca de 170 casos de CH, dos quais apenas 11 casos eram tumores secretores de GH. Relato do Caso: relatamos o caso de um paciente do sexo masculino de 63 anos com história de adenoma hipofisário recorrente secretor de GH com uma nova lesão no forame magno. Paciente havia sido submetido previamente a três cirurgias transesfenoidais devido a recidivas locais do tumor. O período de latência entre o diagnóstico do tumor hipofisário e a identificação da metástase foi de 22 anos. As características histológicas da lesão do forame magno foram semelhantes às do tumor selar inicial e imunorreativas para GH. Discussão e conclusão: devemos estar atentos aos riscos de recorrência dos tumores hipofisários, por vezes comportando-se como tumores malignos e apresentando padrões atípicos, mesmo muitos anos após a apresentação inicial. O tratamento deve ser adaptado individualmente para cada paciente com cirurgia, radioterapia e quimioterapia.
Introduction: pituitary carcinomas (PC) are rare tumors characterized by the presence of central nervous system or systemic metastases of a previous pituitary adenoma. Estimated incidence is less than 0.5% of symptomatic pituitary tumors. Most common types are corticotrophin and prolactin tumors, followed by GH and gonadotrophin carcinomas. English literature presents about 170 cases of PC, of which only 11 cases were GH secreting tumors. Case Presentation: we report a case of a 63-year-old male patient with history of recurrent GH secreting pituitary adenoma with a new lesion in foramen magnum. Patient had been previously submitted to three transsphenoidal surgeries due to local recurrences of tumor. Latency period between diagnosis of pituitary tumor and identification of metastasis was 22 years. Histological characteristics of foramen magnum lesion were similar to those of initial sellar tumor and immunoreactive for GH. Discussion and Conclusion: we should be aware of recurrence risks of pituitary tumors, behaving sometimes like malignant tumors and presenting atypical patterns, even many years after initial presentation. Treatment should be tailored to individual patient with surgery, radiotherapy and medical therapy.
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1 MD, PhD, Neurosurgeon, DFV Neuro, Sírio Libanês Hospital, Oswaldo Cruz German Hospital; ENT Partner DFV Neuro, São Paulo, Brazil.
2 MD, PhD, Otorhinolaryngologist, Sírio Libanês Hospital, Oswaldo Cruz German Hospital; ENT Partner DFV Neuro, Centro de Otorrino de São Paulo, São Paulo, Brazil.
3 MD, Neurosurgeon, DFV Neuro, Sírio Libanês Hospital, Oswaldo Cruz German Hospital - São Paulo-Brazil; ENT Partner DFV Neuro, São Paulo, Brazil.
4 MD, PhD, Neurosurgeon, DFV Neuro, Sírio Libanês Hospital, Oswaldo Cruz German Hospital; ENT Partner DFV Neuro, São Paulo, Brazil.
5 MD, PhD, General Internal Medicine Service, Clinics Hospital, São Paulo, Brazil.
Received Nov 16, 2021
Corrected Jan 9, 2023
Accepted Jan 23, 2023