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Purpose: In microscopic testicular sperm extraction (mTESE) for nonobstructive azoospermia (NOA), sperm can be recovered relatively easily in some cases, and mTESE may be retrospectively considered excessive. However, mTESE is routinely performed in the majority of NOA patients because of the difficulty in predicting tissue status. A minimally invasive and comprehensive sperm retrieval method that allows on-the-spot tissue assessment is needed. We have developed and evaluated a novel sperm retrieval technique for NOA called micromapping testicular sperm extraction (MMTSE). Methods: MMTSE involves dividing the testis into four sections and making multiple small needle holes in the tunica albuginea to extract seminiferous tubules and retrieve sperm. The sperm-positive group by MMTSE (Group I) underwent additional tissue collection (ATC) via a small incision, whereas the sperm-negative group by MMTSE (Group 0) underwent mTESE. Results: In total, 40 NOA participants underwent MMTSE. Group I included 15 patients and Group 0 included 25 patients. In Group 1, sperm were recovered from all patients by ATC. In Group 0, sperm were recovered in 4 of 25 cases using mTESE. Conclusions: MMTSE shows promise as a simple method that comprehensively searches testicular tissue and retrieves sperm using an appropriate method while minimizing patient burden.
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A 52-year-old woman was presented with abdominal distension. Chest-abdominal CT showed some tumors in the left breast, enlarged axillary lymph nodes, ovary metastasis peritoneal thickening, a large amount of ascites. The diagnosis of needle biopsy in the breast mass was invasive ductal carcinoma, Luminal A type. The large amount of ascites decreased after the start of administration of fulvestrant and CDK4/6 inhibitor(PAL). Also chest and abdominal CT showed reduction of all lesions. We found the high expression of cyclin D1 protein and the negative of p16 protein in tissues of the needle biopsy. Fifty months later, she continues to do good ADL and PR status. We experienced a case of metastatic breast cancer with massive ascites and peritoneal metastasis that was successfully treated with a CDK4/6 inhibitor(PAL)and achieved long- term survival.
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Neoplasias da Mama , Neoplasias Ovarianas , Neoplasias Peritoneais , Piperazinas , Piridinas , Feminino , Humanos , Pessoa de Meia-Idade , Ascite , Neoplasias da Mama/tratamento farmacológico , Neoplasias Peritoneais/tratamento farmacológico , Quinase 4 Dependente de CiclinaRESUMO
RESEARCH QUESTION: Are children born from vitrified-warmed oocytes physically or mentally different from naturally conceived children? DESIGN: Intracytoplasmic sperm injection (ICSI) of vitrified-warmed oocytes was performed for 282 patients (307 cycles) from August 2000 to March 2020. Long-term follow-up of children born from vitrified-warmed oocytes was performed via a questionnaire that was sent to the parents at regular intervals from 3 to 72 months after the child's birth. Questionnaires were sent 11 times from birth to the age of 6 years. The development of motor function and mental status was evaluated as the primary outcome, based on the reported data. Subsequently, patients were divided into four groups by age at oocyte retrieval (20-29, 30-34, 35-39, and 40 years or older). Clinical outcomes were calculated as a secondary outcome. RESULTS: For the 282 patients, the birth of 116 babies was reported (110 singletons and three sets of twins), and seven cases are, at the time of writing, unconfirmed. The results of the survey found physical parameters in singletons to be equivalent to the nationally reported average data issued by the Ministry of Health, Labor and Welfare of Japan. CONCLUSION: This is the first follow-up report of children born from vitrified-warmed oocytes followed by ICSI. The data suggested that the responses from the study participants on the mental and physical development of children were comparable to the data reported by the government, although more responses from patients should be collected to allow further study.
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Desenvolvimento Infantil , Oócitos , Vitrificação , Adulto , Criança , Pré-Escolar , Feminino , Seguimentos , Humanos , Lactente , Masculino , Injeções de Esperma Intracitoplásmicas , Adulto JovemRESUMO
Aortogenic embolic stroke (AES) is an important stroke mechanism. However, as many stroke patients have aortic atheromatous lesions, it is unclear whether these lesions are the cause of these strokes. Cholesterol crystals are the solid, crystalline form of cholesterol that is found in atherosclerosis, but not in cardiac diseases such as atrial fibrillation, valvular diseases, and cardiomyopathy. Therefore, if a cholesterol crystal is found in a thrombus removed by mechanical thrombectomy (MT), this makes it possible to diagnose a patient as having an atheromatous lesion. Here, we report an AES case with a cholesterol crystal found in a thrombus removed by MT. A 67-year-old man was admitted due to consciousness disturbance, aphasia, and right hemiplegia. Diffusion-weighted imaging (DWI) showed a hyperintense area in the left frontal lobe, and magnetic resonance angiography demonstrated a branch occlusion of the left middle cerebral artery (MCA). MT was performed 1.5 h after stroke onset, with the thrombus removed and a left occluded MCA completely recanalized. Carotid duplex ultrasonography did not reveal any plaque in the carotid artery. Echocardiography did not show any abnormal function or findings, including thrombus. Transesophageal echocardiography showed a 4.9 mm atheromatous lesion at the aortic arch. Therefore, we suspected this patient as having an AES due to the embolic source of atheromatous lesion at the aortic arch. Pathological examination of the embolus revealed a cholesterol crystal cleft in the thrombus. Therefore, we diagnosed this patient as having AES caused by an atheromatous lesion at the aortic arch.
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Doenças da Aorta/complicações , Aterosclerose/complicações , Colesterol/análise , Embolia Intracraniana/terapia , Trombose Intracraniana/terapia , Placa Aterosclerótica , Acidente Vascular Cerebral/terapia , Trombectomia , Idoso , Doenças da Aorta/diagnóstico por imagem , Doenças da Aorta/metabolismo , Aterosclerose/diagnóstico por imagem , Aterosclerose/metabolismo , Cristalização , Humanos , Embolia Intracraniana/diagnóstico por imagem , Embolia Intracraniana/etiologia , Trombose Intracraniana/diagnóstico por imagem , Trombose Intracraniana/etiologia , Masculino , Fatores de Risco , Acidente Vascular Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/etiologia , Resultado do TratamentoRESUMO
A 42-year-old woman consulted our hospital with chief complaints of a right breast mass and pain. Based on needle biopsy of the breast tumor, the pathological diagnosis was invasive ductal carcinoma(scirrhous type), which tested positive for estrogen, progesterone, and HER2 receptor. PET-CT(FDG)showed intrathoracic lymph node metastasis. After several tests, she received a diagnosis of cT2N1M1(LYM), Stage â £ breast cancer. She received pertuzumab, trastuzumab, and docetaxel treatments. After chemotherapy, the intrathoracic lymph node and breast tumors were not observed. She underwent mastectomy and axillary lymph node dissection. The pathological diagnosis showed a complete response after surgery. The patient's postoperative course was uneventful; she had received radiotherapy and anti-HER2 therapy. Twenty-three months after the surgery, no recurrence was observed. Herein, we report successful treatment of Stage â £ breast cancer with conversion therapy.
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Neoplasias da Mama , Adulto , Terapia Combinada , Feminino , Humanos , Excisão de Linfonodo , Linfonodos , Mastectomia , Recidiva Local de Neoplasia , Tomografia por Emissão de Pósitrons combinada à Tomografia ComputadorizadaRESUMO
Enantiomeric separations of centrally acting muscle relaxants, that is, tolperisone (TOL) and eperisone (EP), that are marketed as racemates were investigated by reversed-phase high-performance liquid chromatography (HPLC) on a polysaccharide-based chiral column. Both TOL and EP are basic drugs because they contain a tertiary amino group and have similar chemical structures with the exception of the p-methylphenyl and p-ethylphenyl groups in TOL and EP, respectively. A reversed-phase chiral column, that is, a Chiralcel OZ-RH column, which bears cellulose tris(3-chloro-4-methylphenylcarbamate) as the chiral moiety, was effective for the enantiomeric separation of TOL and EP enantiomers. The separation factor and resolution values obtained for TOL were 1.22 and 1.66, respectively, and those for EP were 1.21 and 2.24, respectively, using a 20 mm ammonium acetate in H2 O (pH 8.0 and 7.0, respectively)-CH3 CN (70:30) mobile phase. Using the proposed HPLC conditions, it was found that (R)-TOL eluted faster than (S)-TOL, as revealed by the optical rotation and circular dichroism spectroscopy. In contrast, EP was easily racemized under the experimental conditions, and hence, the elution order was not determined.
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Cromatografia Líquida de Alta Pressão/métodos , Cromatografia de Fase Reversa/métodos , Propiofenonas/química , Tolperisona/química , Celulose/análogos & derivados , Celulose/química , Cromatografia Líquida de Alta Pressão/instrumentação , Cromatografia de Fase Reversa/instrumentação , Fenilcarbamatos/química , Propiofenonas/isolamento & purificação , Estereoisomerismo , Tolperisona/isolamento & purificaçãoRESUMO
A 56-year-old right-handed man was referred to our hospital for evaluation of sudden-onset transient quadrantanopia, which was followed by throbbing headache consistent with migraine with aura (MA). Magnetic resonance imaging (MRI) of the right parieto-occipital cortex on admission showed a hyperintense region on diffusion-weighted imaging, which disappeared 7 days later. A small cortical infarct in the parieto-occipital cortex can cause MA-like headache, and the present infarct lesion was only detectable on MRI during the acute phase. Performing MRI for patients with suspected acute MA might help identify the cause of MA-like headache and ensure appropriate management of patients.
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Schizophrenia develops during adolescence. Maternal infections during the fetal period increase the incidence of schizophrenia in children, which suggests that the pathogenesis involves neuroinflammation. Here, we report a case of new-onset schizophrenia in a 16-year-old boy after COVID-19. After developing COVID-19, he entered a catatonic state 4 days later and was hospitalized. Benzodiazepines alleviated his catatonia, but hallucinations and delusions persisted. Encephalitis and epilepsy were excluded by magnetic resonance imaging (MRI), encephalography, and cerebrospinal fluid examination. Psychosis persisted after the virus titer declined and the inflammatory response subsided. Moreover, the patient exhibited delusions of control-a Schneider's first-rank symptom. Schizophrenia was diagnosed, and olanzapine improved his symptoms. He had a brief history of insomnia before COVID-19 but his symptoms did not satisfy the ultra-high-risk criteria. However, COVID-19 may have facilitated development of schizophrenia through neuroinflammation and volume reduction in the gray matter of the right medial temporal lobe. This case demonstrates that infectious diseases in adolescents should be carefully managed, to prevent schizophrenia.
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Essential oils are composed of multiple components. It is thought that the effect of essential oils is due to specific component ratios, which may differ from the original ratio when the essential oil is absorbed. However, very little detailed research exists in this area. We studied the distribution of essential oil components after inhalation of single and mixed components in mice. This research was done using four main components of Alpinia zerumbet (Pers.) B. L. Burtt. and R. M. Sm.: α-pinene, p-cymene, 1,8-cineole, and limonene. After inhalation of single or mixed components for 90 min, component levels in the brain and liver of mice were measured. The results indicated that the amount of α-pinene in the brain and liver was twofold greater after mixed-component inhalation than that after single-component inhalation. In a comparison of the components of the mixed inhalation, the ratio of α-pinene increased to about three times that of 1,8-cineole. It is thought that the absorption via the nasal mucus greatly influences this phenomenon. The results of this investigation of the bodily distribution of essential oil volatile components may provide clues for elucidating their action.
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Alpinia/química , Exposição por Inalação , Óleos Voláteis/farmacocinética , Adsorção , Animais , Monoterpenos Bicíclicos , Encéfalo/metabolismo , Cicloexanóis/farmacocinética , Cicloexenos/farmacocinética , Cimenos , Eucaliptol , Cromatografia Gasosa-Espectrometria de Massas , Limoneno , Fígado/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos ICR , Monoterpenos/farmacocinética , Óleos de Plantas/farmacocinética , Terpenos/farmacocinéticaRESUMO
A series of amphiphilic salen complexes, [L1a,bM] and [L2a,bM], were designed and synthesized. These complexes consist of two or four hydrophilic triethylene glycol (TEG) chains and a hydrophobic π-extended metallosalen core based on naphthalene or phenanthrene. The obtained amphiphilic complexes, [L1bM] (M = Ni, Cu, Zn), formed a monolayer at the air-water interface, while the monocationic [L1bCo(MeNH2)2](OTf) did not form a well-defined monolayer. The number of hydrophilic TEG chains also had an influence on the monolayerformation behavior; the tetra-TEG derivatives, [L1bNi] and [L2bNi], showed a pressure rise at a less compressed region than the bis-TEG derivatives, [L1aNi] and [L2aNi]. In addition, the investigation of their compressibility and compression modulus suggested that the tetra-TEG derivatives, [L1bNi] and [L2bNi], are more flexible than the corresponding bis-TEG analogues, [L1aNi] and [L2aNi], and that the phenanthrene derivatives [L1a,bNi] were more rigid than the corresponding naphthalene analogues, [L2a,bNi]. The Langmuir-Blodgett (LB) films of one of the complexes, [L1bNi], showed CD spectra slightly different from that in solution, which may originate from the unique anisotropic environment of the air-water interface. Thus, we demonstrated the possibility of controlling the chiroptical properties of metal complexes by mechanical compression.
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Polietilenoglicóis , Água , Água/química , Conformação MolecularRESUMO
Coronavirus disease (COVID-19) vaccination is known to cause a diagnostic dilemma due to false-positive findings on [18F]FDG PET in vaccine-associated hypermetabolic lymphadenopathy. We present two case reports of women with estrogen-receptor (ER)-positive cancer of the breast who were vaccinated for COVID-19 in the deltoid muscle. [18F]FDG positron emission tomography (PET) demonstrated primary breast cancer and multiple axillary lymph nodes with increased [18F]FDG uptake, diagnosed as vaccine-associated [18F]FDG-avid lymph nodes. Subsequent [18F]FES PET revealed single axillary lymph node metastasis in the vaccine-associated [18F]FDG-avid lymph nodes. To the best of our knowledge, this is the first study showing the usefulness of [18F]FES PET in diagnosing axillary lymph node metastasis in COVID-19-vaccinated patients harboring ER-positive breast cancer. Thus, [18F]FES PET has potential applications in the detection of true-positive metastatic lymph nodes in patients with ER-positive breast cancer regardless of the ipsilateral or contralateral side, who have received COVID-19 vaccination.
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Metastatic invasive lobular breast cancer (ILC) to the colon is rare and usually ER-positive. We present an ER-negative case of metastatic ILC presenting as linitis plastica of the colon where [18 F]FES PET/MRI allowed the evaluation of the ER phenotypic transformation in the colonic metastasis from the ER-positive breast ILC in vivo.
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Neoplasias da Mama , Carcinoma Lobular , Linite Plástica , Neoplasias Gástricas , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/patologia , Carcinoma Lobular/diagnóstico por imagem , Carcinoma Lobular/secundário , Colo/patologia , Feminino , Humanos , Linite Plástica/diagnóstico por imagem , Linite Plástica/patologia , Linite Plástica/secundário , Imageamento por Ressonância Magnética , Tomografia por Emissão de PósitronsRESUMO
The pathophysiology of unilateral cortical fluid-attenuated inversion recovery (FLAIR)-hyperintense lesions in anti-myelin oligodendrocyte glycoprotein (MOG)-associated encephalitis with seizures (FLAMES) is unclear. A 26-year-old man was referred because of a seizure. FLAIR showed an increased signal intensity and swelling of the right frontal cortex. His symptoms and imaging abnormalities were improved after intravenous methylprednisolone therapy. MOG antibody was detected both in serum and cerebrospinal fluid (CSF). Therefore, the patient was diagnosed with FLAMES. Myelin basic protein (MBP) was elevated in CSF. The high MBP value in the CSF in the present case suggested that demyelination as well as inflammation can occur in some FLAMES patients.
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Encefalite , Mielite , Humanos , Proteína Básica da Mielina , Autoanticorpos , Glicoproteína Mielina-Oligodendrócito , Encefalite/diagnóstico , Imageamento por Ressonância Magnética , ConvulsõesRESUMO
The essential oils extracted from the leaves and the shoots of five Abies species (Pinaceae) growing in Japan, i.e., A. firma, A. homolepis, A. veitchii, A. mariesii, and A. sachalinensis, were characterized by GC-FID and GC/MS analyses. The yields of the essential oils extracted from A. sachalinensis were the highest among them. A significant amount of α-pinene was contained in the essential oils of all the Abies species examined. In A. homolepis and A. veitchii, significant differences in the content of the essential oils were found depending on whether these were extracted from the leaves or from the shoots. Regarding the enantiomeric ratio of α-pinene, the (+)-enantiomer was predominant in the oil extracted from the leaves of A. firma, while (-)-α-pinene was present in higher amounts in the oils of A. veitchii (leaves and shoots), A. mariesii (leaves and shoots), and A. sachalinensis (shoots). The fact that there may be a quantitative and qualitative difference in the components of the essential oils extracted from the different parts of a plant was investigated by cluster analysis.
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Abies/química , Monoterpenos/análise , Óleos Voláteis/química , Monoterpenos Bicíclicos , Análise por Conglomerados , Cromatografia Gasosa-Espectrometria de Massas , Japão , Folhas de Planta/química , Brotos de Planta/química , Análise de Componente Principal , EstereoisomerismoRESUMO
PURPOSE: Estrogen receptor (ER) is expressed in the majority of invasive breast cancer and is an important prognostic indicator. The tumor stroma also plays an important role in disease progression. This study evaluated the effect of stromal components on 16α-[18F]-fluoro-17ß-estradiol (18F-FES) uptake in breast cancer and proposed a partial-volume correction method for 18F-FES PET based on histopathological analyses. PATIENTS AND METHODS: Fifteen patients with biopsy-confirmed breast cancer underwent preoperative 18F-FES PET. Estrogen receptor expression in biopsy specimens was assayed by immunohistochemistry, cellular components in surgical specimens were measured using hematoxylin-eosin staining, and nuclear components in surgical and biopsy specimens were measured using Azan-Mallory staining. The relationship between 18F-FES SUV of the primary tumor and histopathological findings including ER expression, the Allred score, ER-positive cellular component ratio, and ER-positive nuclear component ratio (NCR) was examined. The relationship between stroma-free 18F-FES SUV and ER expression was also examined. RESULTS: 18F-FES uptake was not significantly positively correlated with ER expression (r = 0.44, P = 0.10). 18F-FES uptake was significantly correlated with the Allred score, ER-positive cellular component ratio, and ER-positive NCR in surgical specimens (ρ = 0.60, P = 0.02; r = 0.55, P = 0.03; and r = 0.65, P = 0.01, respectively). 18F-FES uptake was predominantly correlated with ER-positive NCR in biopsy specimens (r = 0.84, P < 0.001). Stroma-free 18F-FES SUV was significantly correlated with ER expression (r = 0.78, P < 0.01). CONCLUSIONS: 18F-FES PET predominantly demonstrates the level of ER expression in breast cancer cell nucleus. Although tumor 18F-FES uptake is affected by the degree of stromal components, the partial volume effect on the uptake can be corrected by stroma-volume fraction in Azan-Mallory staining.
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Neoplasias da Mama , Biópsia , Neoplasias da Mama/diagnóstico por imagem , Estradiol , Feminino , Humanos , Imuno-Histoquímica , Tomografia por Emissão de Pósitrons , Receptores de EstrogênioRESUMO
AIM: To clarify the morphologic characteristics of the brain, which are the foundation of the emergence of general movements (GMs) in very-low-birth-weight infants. STUDY DESIGN: Prospective cohort study. GMs were scored according to a semiquantitative scoring system: the GMs optimality score (GMOS) at preterm and term ages. Brain magnetic resonance imaging (MRI) at term-equivalent age was scored using a validated scoring system (MRI score). We examined the relationship between the two scores by multiple regression analysis with relevant clinical background. SUBJECTS: We included 50 very-low-birth-weight infants cared for at Oita University Hospital from August 2012 to August 2018 who underwent MRI and GMs assessment. Their median gestational age and birth weight were 29w2d and 1145â¯g, respectively. RESULTS: The MRI score and systemic steroid administration were related to preterm GMOS, and the MRI score was related to term GMOS. The component cerebellum score and cortical grey matter score of the MRI score were associated with preterm GMOS, and the cerebellum and the cerebral white matter scores were associated with term GMOS. CONCLUSION: The quality of GMs was associated with brain morphological development. The co-evaluation of GMs and brain morphology leads to accurate developmental prediction.
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Encéfalo/patologia , Recém-Nascido Prematuro/crescimento & desenvolvimento , Movimento/fisiologia , Encéfalo/crescimento & desenvolvimento , Cerebelo/crescimento & desenvolvimento , Cerebelo/patologia , Desenvolvimento Infantil , Estudos de Coortes , Feminino , Idade Gestacional , Substância Cinzenta/crescimento & desenvolvimento , Substância Cinzenta/patologia , Humanos , Lactente , Recém-Nascido , Recém-Nascido de muito Baixo Peso/fisiologia , Japão , Imageamento por Ressonância Magnética/métodos , Masculino , Triagem Neonatal/métodos , Estudos Prospectivos , Substância Branca/crescimento & desenvolvimento , Substância Branca/patologiaRESUMO
BACKGROUND: Following the increase in the number of children with food allergies, support systems are now required for school lunches, but a large-scale factual investigation has not been carried out. OBJECTIVE: We evaluated the features of elimination diet due to food allergy and the support system in kindergartens and schools. METHODS: A prefecture-based questionnaire survey regarding measures for food allergies in school lunches of all kindergartens, public elementary schools, and public junior high schools (631 facilities) was conducted in Oita Prefecture, Japan. RESULTS: The recovery rate of the questionnaire was 99.5%, which included 106,008 students in total. A total of 1,562 children (1.5%) required elimination diets. The rate of children on elimination diets in kindergartens and elementary/junior high schools that required medical certification by a physician was 1.2% (324 among 27,761 children), which was significantly lower than the 1.8% of children (1,227 among 68,576 students) on elimination diets at the request of guardians without the need for medical certification (p < 0.0001). A total of 43.9% of the kindergartens and schools said that they would contact guardians if symptoms were observed after accidental ingestion, while a low 8.1% stated that they provided support to children themselves, including the administration of adrenaline auto-injectors. CONCLUSION: Medical certification reduces the number of children requiring elimination diets, but it has not been adequately implemented. Furthermore, waiting to contact guardians after symptoms are observed may lead to the delayed treatment of anaphylaxis. Cooperation between physicians and teachers is desired to avoid the overdiagnosis and undertreatment of children with food allergies.
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A recently proposed method for estimating the route and speed of infectious disease propagation is applied to the data of four pharmacies located in and around Tokyo. The time lags of propagation between distant sites are calculated by the cross-correlation function of the daily variations in the amount of influenza anti-virus agents supplied at the pharmacies. A problem of which are infected earlier with influenza, adults or children, is also treated. The features of this study are the information sources of disease (pharmacies) and quantitative understanding of propagation (time lags).
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Antivirais , Comércio/estatística & dados numéricos , Uso de Medicamentos/estatística & dados numéricos , Influenza Humana/epidemiologia , Farmácias/estatística & dados numéricos , Adulto , Criança , Humanos , Influenza Humana/transmissão , Fatores de Tempo , Tóquio/epidemiologiaRESUMO
To investigate malformations associated with cleft lip and cleft palate, we conducted surveys at neonatal intensive care units (NICUs) and other non-NICU facilities and to determine whether there are differences among facilities. The regional survey investigated NICU facilities located in Oita Prefecture, including 92 patients with cleft lip and palate (CLP) or cleft palate (CP) that occurred between 2004 and 2013, and the national survey investigated oral surgery, plastic surgery, and obstetrics and gynecology facilities located in Japan, including 16,452 patients with cleft lip (CL), CLP, or CP that occurred since 2000. The incidence per 10,000 births was 4.2, 6.2, and 2.8 for CL, CLP, and CP, respectively, according to the national survey, and 6.3 and 2.9 for CLP and CP, respectively according to the regional survey. These results indicated comparable incidences between the two surveys. In contrast, when the survey results on malformations associated with CLP and CP according to the ICD-10 classification were compared between the national survey conducted at oral surgery or plastic surgery facilities and the regional survey conducted at NICU facilities, the occurrence of associated malformations was 19.8% vs. 41.3% for any types of associated malformation, 6.8% vs. 21.7% for congenital heart disease, and 0.5% vs. 16.3% for chromosomal abnormalities. These results indicated that the incidences of all of these associated malformations were significantly greater in the survey conducted at NICU facilities and similar to the findings from international epidemiological surveys. When comparing the survey conducted at obstetrics facilities vs. NICU facilities, the occurrence of associated malformations was similar results as above. The incidence of CLP and CP was not different between surveys conducted at NICU facilities vs. non-NICU facilities; however, when conducting surveys on associated malformations, it is possible to obtain accurate epidemiological data by investigating NICU facilities where detailed examinations are thoroughly performed.