Analysis of Small Cell Lung Cancer with Paraneoplastic Limbic Encephalitis / 中国肺癌杂志

BACKGROUND@#The aim of this study was to investigate the clinical features of paraneoplastic limbic encephalitis (PLE) with small cell lung cancer (SCLC) and improve clinical diagnosis and treatment.@*METHODS@#The clinical data of 15 patients with SCLC combined with PLE from January 1980 to May 2017 were collected from Beijing Union Hospital. Their symptoms and laboratory data were analyzed and the prognosis of the patients was followed.@*RESULTS@#PLE is a rare disease, the incidence rate in SCLC is about 0.842%. The data may be underestimated because of misdiagnose or missed diagnosis; High incidence crowd of the disease is the middle-aged male smoker, the tumor-node-metastasis (TNM) stages of them are later than others; Typical neurological symptoms include varying degrees of short-term memory loss, seizures and varying degrees of mental disorders; neurological symptoms usually occur before the onset of cancer or respiratory symptoms appear, an average of about 2 months be taken from onset to diagnosis; Serum antibody (anti-Hu, GABA-R-Ab), cerebrospinal fluid, head magnetic resonance imaging (MRI) and electroencephalogram (EEG) of the patients has abnormalities; Videography, especially computed tomography (CT) is a good means of screening the primary tumor, pathology diagnosis mainly rely on bronchoscopy; The treatment of primary tumors can be more effective in alleviating the nervous system symptoms than immunotherapy.@*CONCLUSIONS@#Paraneoplastic limbic encephalitis is a rare paraneoplastic syndrome in nervous system caused by malignant neoplasms often characterized by facial neurological symptoms. The disease are usually associated with lung cancer (especially SCLC). Its nervous system symptoms occur earlier than the tumor diagnosis. Early diagnosis and treatment for primary tumors will increase the benefit.

A case of paraneoplastic limbic encephalitis due to ovarian mature teratoma / 소아과

Paraneoplastic limbic encephalitis, a remote effect of cancer without nervous system metastasis, is rare, especially in childhood. Here, we report a case of paraneoplastic limbic encephalitis associated with an ovarian mature teratoma in an adolescent girl. The 15-year-old girl developed neuropsychiatric symptoms, memory loss, seizures, and unconsciousness. Cerebrospinal fluid analysis and brain magnetic resonance imaging (MRI) findings were normal, while single photon emission computed tomography imaging showed hypoperfusion in both temporal lobes. Ultrasound and MRI of the abdomen revealed a left ovarian cystic mass. The patient experienced a significant recovery of cognitive function after surgical resection of the tumor, which was pathologically identified as a mature ovarian teratoma, and treatment with intravenous immunoglobulin.

A Case of Paraneoplastic Limbic Encephalitis Associated with Primary Adenocarcinoma of Lung / 결핵및호흡기질환

Paraneoplastic limbic encephalitis is a rare disorder that is characterized by personality changes, irritability, depression, seizures, memory loss and dementia, and is commonly associated with small cell lung cancer. The cause is unknown but it is believed to be an autoimmune disorder that develops secondary to a carcinomatous process. We report a patient with the clinical feature consistent with limbic encephalitis. A 64-year-old women developed disorientation, memory loss and general weakness. She was diagnosed with NSCLC (adenocarcinoma) with a brain metastasis 1 year earlier and was treated with radiation and chemotherapy. Although the lung mass and brain metastatic lesions had improved, the brain T2-weighted MRI showed high signal intensity in the right temporal region. This lesion consisted of with limbic encephalitis and was negative to the other viral and immune markers. The patient's symptoms did not improve after steroid treatment. Our case demonstrated that a NSCLC (adenocarcinoma) also can be associated with paraneoplastic limbic encephalitis.

A Case of Immature Ovarian Teratoma Combined with Paraneoplastic Limbic Encephalitis / 대한산부인과학회지

Paraneoplastic limbic encephalitis (PLE) is a rare neurologic disorder that can be combined with several systemic tumor. PLE is commonly associated with small cell lung carcinoma, but others are uncommon. The cause is unknown, but it is thought to be a autoimmune disorder developing secondary to carcinomatous process. Progressive neurologic symptoms usually predate the diagnosis of cancer, most symptoms usually improve after resection of tumor. PLE can combined with several tumors, but it is very rare with immature ovarian teratoma. We report a case of 31-year-old woman with PLE combined with an immature ovarian teratoma whose neurologic symptoms improved after resection of primary tumor.

A Case of Paraneoplastic Limbic Encephalitis Associated with Immature Ovarian Teratoma

Paraneoplastic limbic encephalitis is commonly associated with small cell lung carcinoma. A 31-year-old female presented with amnesia and bizarre behavior for 1 month. Brain T2-weighted MRI showed high signal intensity in right medial temporal region. Abdominal CT revealed a mass in right lower abdomen, and subsequent excisional biopsy disclosed immature ovarian teratoma. Most symptoms improved after resection of the tumor. Our case demonstrates that immature ovarian teratoma also can be associated with paraneoplastic limbic encephalitis with good prognosis.