Background: Rhinocerebral mucormycosis is a fatal infection typically affecting diabetic or immunosuppressed patients. In most cases, infection is caused by inhalation of fungal spores. Mortality rate of patients is very high (40-85%).Case Presentation: In this study, three diabetic patients with rhinocerebral mucormycosis were presented. The etiologic agents of mucormycosis in two patients were isolated and identified by sequence analysis and data were registered in Gene bank database.Conclusion: In patients with mucoreosis, early detection, surgical excision and appropriate debridement, suitable antifungal therapy, and control of risk factors like diabetes mellitus are the main parameters of successful management of this lethal infection.

In this paper, we propose a new residual analysis method using Fourier series transform into fuzzy time series model for improving the forecast- ing performance. This hybrid model takes advantage of the high predictable power of fuzzy time series model and Fourier series transform to t the esti- mated residuals into frequency spectra, select the low-frequency terms, lter out high-frequency terms, and then have well forecasting performance. Two numerical examples are given to show that our proposed model can be applied with the best forecasting performance than the other models.

The well–known Mathieu seriesSM(r) =S¥n=1 2n/(n2+r2)2  (r>0)can be transformed into the formSM(r) =1/2r S¥n=1 Önr2/(Ön2+r2/2)4=1/2r S¥n=1 g2(n,r)/Q4 (n,r)where G(n, r) and Q(n, r) denote the Geometric and Quadratic mean of n Î N and r > 0. This connection leads us to the idea to introduce and research the so–called Quotient mean series as a be a generalizations of Mathieu’s and Mathieu–type series. We give an integral representation of such series and their alternating variant, together with associated inequalities. Also, special cases of quotient mean series, involving Bessel function of the first kind, have been studied in detail.

Background: Sirenomelia is a rare congenital anomaly characterized by the fusion of two lower limbs, resulting in the mermaid’, s tail appearance. Sirenomelia is a very rare syndrome and can be fatal to the infant. This syndrome might be sporadic or have a genetic basis. The etiology of sirenomelia is unknown but said to be multifactorial. Some maternal factors associated with sirenomelia include diabetes melitus, maternal age under 20 years and monozygote twinning. Case report: This report presented four cases of sirenomelia that occurred during 2006-2019 at Fatemieh Hospital, a tertiary maternal-neonatal center, Hamadan, Iran. All of the pregnancies were complicated by oligohydramnios. None of the mothers were younger than 20 years, and none had diabetes mellitus. Moreover, their drug history during pregnancy was negative. All newborns had low Apgar scores and died a few minutes after birth, indicating their poor outcomes. None of the cases were diagnosed prenatally, and all newborns were firstborn infants. Conclusion: Sirenimelia is a rare lethal condition, which requires prenatal diagnosis for abortion planning.

Central airway stenosis may be a manifestation of benign or malignant lesions and can be a life threatening condition.There are different surgical and endoscopic modalities for treatment of these lesions. Balloon bronchoscopy is an interventional pulmonologic modality and can be performed under direct vision or fluoroscopic guidance.This technique can be used along with other interventional modalities for treatment of patients with tracheal stenosis.In this study we report balloon bronchoscopy as an interventional modality in a series of patients with tracheal stenosis and assess the outcome.

Background: In the past 20 years, a dramatic improvement in the prognosis of patients with hepatoblastoma (HB) has been achieved by combining surgery and chemotherapy in several national and international trials.Materials and Methods: Four children (3 girl and 1 boy) aged 34 days, 4 months, 13 months, and 1 year with mean age of 6.53 (±5.15) months were presented to our center from 2002 to 2009 with abdominal mass and abdominal distention. Their abdominal ultrasonography revealed liver mass, and pathological diagnosis was hepatoblasma. They were treated with a combination of surgery and chemotherapy.Results: Patients with non-metastatic HB were treated at Shahid Sadoughi Hospital of Yazd. A complete resection of primary tumor was achieved in all of them. The median follow- up of the patients was 38.25 (± 29.02) month and all of them (100%) remained alive with complete remission.