Mai Trương - Academia.edu (original) (raw)

Papers by Mai Trương

Lasers in Surgery and Medicine, 2005

optical methods to generate heat in cartilage is that microspot injuries could be created in tiss... more optical methods to generate heat in cartilage is that microspot injuries could be created in tissue and scanned across surfaces in clinical applications. Lasers Surg. Med. 37:89-96, 2005. ß 2005 Wiley-Liss, Inc.

International Journal of Pediatric Otorhinolaryngology, 2007

International Journal of Pediatric Otorhinolaryngology Extra, 2011

Wegener's granulomatosis (WG) classically affects the upper and lower respiratory tracts as well ... more Wegener's granulomatosis (WG) classically affects the upper and lower respiratory tracts as well as the renal system, while central nervous system (CNS) involvement is rare. We report a 17-year-old patient with WG who presented with a 2-month history of meningeal signs, left Horner's syndrome, multiple cranial neuropathies and a left middle ear effusion. MRI demonstrated left middle ear and mastoid effusions, pachymeningitis with diffuse left temporal dural enhancement, and right sinus destructive changes. In this report, we will review diagnostic and therapeutic approaches to Wegener's granulomatosis, with a particular emphasis on CNS manifestations and the adolescent population. ß

International Journal of Pediatric Otorhinolaryngology, 2014

Silent sinus syndrome is characterized by an asymptomatic hypoplastic maxillary sinus with progre... more Silent sinus syndrome is characterized by an asymptomatic hypoplastic maxillary sinus with progressive enophthalmos and hypoglobus. This is a disease rarely affecting children with the majority of reported cases involving adult patients. Treatment is primarily surgical with endoscopic sinus surgery to restore aeration of the sinus along with orbital reconstruction to restore facial symmetry. In this report, we describe a 7 year old child with facial asymmetry and no sinonasal symptoms. CT showed an opacified hypoplastic right maxillary sinus. One year after endoscopic sinus surgery, there was spontaneous improvement of facial asymmetry and relative maxillary sinus size.

American Journal of Otolaryngology, 2014

Background: Neurofibromatosis type 1 can rarely present in the larynx. Patients typically do not ... more Background: Neurofibromatosis type 1 can rarely present in the larynx. Patients typically do not present with complete obstructive symptoms, but partial obstruction and stridor. We review our health centers' case series of two patients, the first of whom presented with persistent sleep apnea post tonsillectomy and adenoidectomy, and the second that presented with noisy breathing.

International Journal of Pediatric Otorhinolaryngology, 2010

Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical, 2001

In vivo, laser radiation has been shown to stimulate cartilage repair and proliferation, which is... more In vivo, laser radiation has been shown to stimulate cartilage repair and proliferation, which is of clinical relevance as light can be delivered using minimally invasive techniques. However, dosimetry and temperature dependence of this phenomenon have neither been determined nor have these findings been conclusively demonstrated ex vivo. In this study, we detected the presence of proliferating chondrocytes in intact

International Journal of Pediatric Otorhinolaryngology, 2012

Ten to twenty percent of children have persistent obstructive sleep apnea (OSA) after adenotonsil... more Ten to twenty percent of children have persistent obstructive sleep apnea (OSA) after adenotonsillectomy (T&A). We hypothesize that sleep endoscopy, a flexible fiberoptic examination of the pharynx under anesthesia, is an effective tool for identifying sites of persistent obstruction. In this retrospective cohort study, we reviewed records of children who had symptoms consistent with OSA and a positive polysomnogram (PSG) who underwent sleep endoscopy followed by sleep endoscopy directed surgery. Data collection included age, BMI and co-morbidities. Apnea-hypopnea index (AHI) was compared to pre and post surgery for each child using a paired t-test. Of the 80 children who underwent sleep endoscopy followed by directed surgery, 65% were male, mean age was 6 years (SD 3.75 years), average BMI was 19 (SD 0.43 years) and 28% had co-morbidities. For the 51% of patients who had persistent OSA after T&A, the mean AHI after sleep endoscopy directed surgery was significantly lower then before surgery (7.9 vs. 15.7, p<.01). For the 49% of patients who had never undergone surgery for OSA, or who were surgically naïve, and underwent sleep endoscopy directed surgery, the mean AHI was significantly lower then before surgery (8.0 vs. 13.8, p<.01). Sleep endoscopy is a consistently reliable tool for identifying the sites of obstruction in both surgically naive children and those with persistent OSA after T&A.

Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical, 2002

Laser irradiation may stimulate chondrocytes proliferation in the peripheral region surrounding a... more Laser irradiation may stimulate chondrocytes proliferation in the peripheral region surrounding a photothermally-heated area in rabbit nasal septal cartilage. In this study, ex- vivo rabbit nasal septal cartilages maintained in culture were irradiated with an Nd:YAG laser ((lambda) equals1.32 micrometers , 4-16 sec, 10-45 W/cm2) to examine the relationship between the diameter of replicating cells and irradiation time. Also, this

The Laryngoscope, 2008

Objectives/Hypothesis: To review the clinical significance of primary hyperparathyroidism during ... more Objectives/Hypothesis: To review the clinical significance of primary hyperparathyroidism during pregnancy including the maternal, fetal, and neonatal sequelae. Additionally, to discuss treatment options and describe three cases where surgical parathyroidectomy was successful for treatment of hyperparathyroidism refractory to medical management during pregnancy.

Sexual Plant Reproduction, 1999

We identified Arabidopsis thaliana sterility mutants by screening T-DNA and EMS-mutagenized lines... more We identified Arabidopsis thaliana sterility mutants by screening T-DNA and EMS-mutagenized lines and characterized several male-sterile mutants with defects specific for different anther processes. Approximately 44 and 855 sterile mutants were uncovered from the T-DNA and EMS screens, respectively. Several mutants were studied in detail with defects that included the establishment of anther morphology, microspore production, pollen differentiation, and anther dehiscence. Both non-dehiscencing and late-dehiscencing mutants were identified. In addition, pollenless mutants were observed with either apparent meiotic defects and/or abnormalities in cell layers surrounding the locules. Two mutant alleles were identified for the POLLENLESS3 locus which have defects in functional microspore production that lead to the degeneration of cells within the anther locules. pol-lenless3-1 contains a T-DNA insertion that co-segregates with the mutant phenotype and pollenless3-2 has a large deletion in the POLLENLESS3 gene. The POLLEN-

Otolaryngology - Head and Neck Surgery, 2009

Modern Pathology, 2012

Propranolol has recently emerged as an effective therapy for infantile hemangiomas causing regres... more Propranolol has recently emerged as an effective therapy for infantile hemangiomas causing regression. The β-adrenergic receptor (AR) antagonist is thought to cause vasoconstriction by its effect on nitric oxide, block angiogenesis by its effect on vascular endothelial growth factor (VEGF), and induce apoptosis. In a prior report, we identified expression of β2-AR (B2-AR) and its phosphorylated form (B2-ARP) in a case of infantile hemangioma that responded to propranolol treatment. We now explore the expression of βARs on a variety of vascular lesions utilizing a tissue microarray containing 141 lesions, including infantile hemangiomas, angiosarcomas, hemangiomas, hemangioendotheliomas, and various vascular malformations. The array was immunostained for B2-AR, B2-ARP, and β3-AR (B3-AR), and the results scored for the intensity of endothelial cell expression as negative, weak positive, or strong positive. All phases of infantile hemangiomas had strong expression of all three receptors, with the exception of only weak expression of B2-ARP in the proliferative phase infantile hemangioma. Strong expression of all three receptors was present in many hemangiomas, hemangioendotheliomas, and vascular malformations. Absent to weak expression of all three receptors was seen in glomus tumor, hobnail hemangioendothelioma, pyogenic granuloma, and reactive vascular proliferations. This is the first study to report β-AR expression in a variety of vascular lesions. Although immunohistochemical expression of the receptors does not necessarily indicate that similar pathways of responsiveness to β-blockade are present, it does raises the possibility that β-blockade could potentially affect apoptosis and decrease responsiveness to VEGF. Additional study is warranted, as therapeutic options are limited for some patients with these lesions.

The Journal of Pediatrics, 2010

An infant with a subglottic hemangioma remained in respiratory distress after multiple treatments... more An infant with a subglottic hemangioma remained in respiratory distress after multiple treatments failed and was found to have an enlarging mediastinal infantile hemangioma compressing the trachea. Treatment with oral propranolol resulted in resolution of symptoms within 2 days and a 50% reduction in lesion size within 1 week. (J Pediatr 2010;156:335-8)

Bài 1: Trong những năm 2005, sản xuất đường ở Mỹ: 11,4 tỷ pao; tiêu dùng 17,8 tỷ pao; giá cả ở Mỹ... more Bài 1: Trong những năm 2005, sản xuất đường ở Mỹ: 11,4 tỷ pao; tiêu dùng 17,8 tỷ pao; giá cả ở Mỹ 22 xu/pao; giá cả thế giới 8,5 xu/pao…Ở những giá cả và số lượng ấy có hệ số co dãn của cầu và cung là Ed = -0,2; Es = 1,54. Yêu cầu:

Lasers in Surgery and Medicine, 2005

optical methods to generate heat in cartilage is that microspot injuries could be created in tiss... more optical methods to generate heat in cartilage is that microspot injuries could be created in tissue and scanned across surfaces in clinical applications. Lasers Surg. Med. 37:89-96, 2005. ß 2005 Wiley-Liss, Inc.

International Journal of Pediatric Otorhinolaryngology, 2007

International Journal of Pediatric Otorhinolaryngology Extra, 2011

Wegener's granulomatosis (WG) classically affects the upper and lower respiratory tracts as well ... more Wegener's granulomatosis (WG) classically affects the upper and lower respiratory tracts as well as the renal system, while central nervous system (CNS) involvement is rare. We report a 17-year-old patient with WG who presented with a 2-month history of meningeal signs, left Horner's syndrome, multiple cranial neuropathies and a left middle ear effusion. MRI demonstrated left middle ear and mastoid effusions, pachymeningitis with diffuse left temporal dural enhancement, and right sinus destructive changes. In this report, we will review diagnostic and therapeutic approaches to Wegener's granulomatosis, with a particular emphasis on CNS manifestations and the adolescent population. ß

International Journal of Pediatric Otorhinolaryngology, 2014

Silent sinus syndrome is characterized by an asymptomatic hypoplastic maxillary sinus with progre... more Silent sinus syndrome is characterized by an asymptomatic hypoplastic maxillary sinus with progressive enophthalmos and hypoglobus. This is a disease rarely affecting children with the majority of reported cases involving adult patients. Treatment is primarily surgical with endoscopic sinus surgery to restore aeration of the sinus along with orbital reconstruction to restore facial symmetry. In this report, we describe a 7 year old child with facial asymmetry and no sinonasal symptoms. CT showed an opacified hypoplastic right maxillary sinus. One year after endoscopic sinus surgery, there was spontaneous improvement of facial asymmetry and relative maxillary sinus size.

American Journal of Otolaryngology, 2014

Background: Neurofibromatosis type 1 can rarely present in the larynx. Patients typically do not ... more Background: Neurofibromatosis type 1 can rarely present in the larynx. Patients typically do not present with complete obstructive symptoms, but partial obstruction and stridor. We review our health centers' case series of two patients, the first of whom presented with persistent sleep apnea post tonsillectomy and adenoidectomy, and the second that presented with noisy breathing.

International Journal of Pediatric Otorhinolaryngology, 2010

Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical, 2001

In vivo, laser radiation has been shown to stimulate cartilage repair and proliferation, which is... more In vivo, laser radiation has been shown to stimulate cartilage repair and proliferation, which is of clinical relevance as light can be delivered using minimally invasive techniques. However, dosimetry and temperature dependence of this phenomenon have neither been determined nor have these findings been conclusively demonstrated ex vivo. In this study, we detected the presence of proliferating chondrocytes in intact

International Journal of Pediatric Otorhinolaryngology, 2012

Ten to twenty percent of children have persistent obstructive sleep apnea (OSA) after adenotonsil... more Ten to twenty percent of children have persistent obstructive sleep apnea (OSA) after adenotonsillectomy (T&A). We hypothesize that sleep endoscopy, a flexible fiberoptic examination of the pharynx under anesthesia, is an effective tool for identifying sites of persistent obstruction. In this retrospective cohort study, we reviewed records of children who had symptoms consistent with OSA and a positive polysomnogram (PSG) who underwent sleep endoscopy followed by sleep endoscopy directed surgery. Data collection included age, BMI and co-morbidities. Apnea-hypopnea index (AHI) was compared to pre and post surgery for each child using a paired t-test. Of the 80 children who underwent sleep endoscopy followed by directed surgery, 65% were male, mean age was 6 years (SD 3.75 years), average BMI was 19 (SD 0.43 years) and 28% had co-morbidities. For the 51% of patients who had persistent OSA after T&A, the mean AHI after sleep endoscopy directed surgery was significantly lower then before surgery (7.9 vs. 15.7, p<.01). For the 49% of patients who had never undergone surgery for OSA, or who were surgically naïve, and underwent sleep endoscopy directed surgery, the mean AHI was significantly lower then before surgery (8.0 vs. 13.8, p<.01). Sleep endoscopy is a consistently reliable tool for identifying the sites of obstruction in both surgically naive children and those with persistent OSA after T&A.

Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical, 2002

Laser irradiation may stimulate chondrocytes proliferation in the peripheral region surrounding a... more Laser irradiation may stimulate chondrocytes proliferation in the peripheral region surrounding a photothermally-heated area in rabbit nasal septal cartilage. In this study, ex- vivo rabbit nasal septal cartilages maintained in culture were irradiated with an Nd:YAG laser ((lambda) equals1.32 micrometers , 4-16 sec, 10-45 W/cm2) to examine the relationship between the diameter of replicating cells and irradiation time. Also, this

The Laryngoscope, 2008

Objectives/Hypothesis: To review the clinical significance of primary hyperparathyroidism during ... more Objectives/Hypothesis: To review the clinical significance of primary hyperparathyroidism during pregnancy including the maternal, fetal, and neonatal sequelae. Additionally, to discuss treatment options and describe three cases where surgical parathyroidectomy was successful for treatment of hyperparathyroidism refractory to medical management during pregnancy.

Sexual Plant Reproduction, 1999

We identified Arabidopsis thaliana sterility mutants by screening T-DNA and EMS-mutagenized lines... more We identified Arabidopsis thaliana sterility mutants by screening T-DNA and EMS-mutagenized lines and characterized several male-sterile mutants with defects specific for different anther processes. Approximately 44 and 855 sterile mutants were uncovered from the T-DNA and EMS screens, respectively. Several mutants were studied in detail with defects that included the establishment of anther morphology, microspore production, pollen differentiation, and anther dehiscence. Both non-dehiscencing and late-dehiscencing mutants were identified. In addition, pollenless mutants were observed with either apparent meiotic defects and/or abnormalities in cell layers surrounding the locules. Two mutant alleles were identified for the POLLENLESS3 locus which have defects in functional microspore production that lead to the degeneration of cells within the anther locules. pol-lenless3-1 contains a T-DNA insertion that co-segregates with the mutant phenotype and pollenless3-2 has a large deletion in the POLLENLESS3 gene. The POLLEN-

Otolaryngology - Head and Neck Surgery, 2009

Modern Pathology, 2012

Propranolol has recently emerged as an effective therapy for infantile hemangiomas causing regres... more Propranolol has recently emerged as an effective therapy for infantile hemangiomas causing regression. The β-adrenergic receptor (AR) antagonist is thought to cause vasoconstriction by its effect on nitric oxide, block angiogenesis by its effect on vascular endothelial growth factor (VEGF), and induce apoptosis. In a prior report, we identified expression of β2-AR (B2-AR) and its phosphorylated form (B2-ARP) in a case of infantile hemangioma that responded to propranolol treatment. We now explore the expression of βARs on a variety of vascular lesions utilizing a tissue microarray containing 141 lesions, including infantile hemangiomas, angiosarcomas, hemangiomas, hemangioendotheliomas, and various vascular malformations. The array was immunostained for B2-AR, B2-ARP, and β3-AR (B3-AR), and the results scored for the intensity of endothelial cell expression as negative, weak positive, or strong positive. All phases of infantile hemangiomas had strong expression of all three receptors, with the exception of only weak expression of B2-ARP in the proliferative phase infantile hemangioma. Strong expression of all three receptors was present in many hemangiomas, hemangioendotheliomas, and vascular malformations. Absent to weak expression of all three receptors was seen in glomus tumor, hobnail hemangioendothelioma, pyogenic granuloma, and reactive vascular proliferations. This is the first study to report β-AR expression in a variety of vascular lesions. Although immunohistochemical expression of the receptors does not necessarily indicate that similar pathways of responsiveness to β-blockade are present, it does raises the possibility that β-blockade could potentially affect apoptosis and decrease responsiveness to VEGF. Additional study is warranted, as therapeutic options are limited for some patients with these lesions.

The Journal of Pediatrics, 2010

An infant with a subglottic hemangioma remained in respiratory distress after multiple treatments... more An infant with a subglottic hemangioma remained in respiratory distress after multiple treatments failed and was found to have an enlarging mediastinal infantile hemangioma compressing the trachea. Treatment with oral propranolol resulted in resolution of symptoms within 2 days and a 50% reduction in lesion size within 1 week. (J Pediatr 2010;156:335-8)

Bài 1: Trong những năm 2005, sản xuất đường ở Mỹ: 11,4 tỷ pao; tiêu dùng 17,8 tỷ pao; giá cả ở Mỹ... more Bài 1: Trong những năm 2005, sản xuất đường ở Mỹ: 11,4 tỷ pao; tiêu dùng 17,8 tỷ pao; giá cả ở Mỹ 22 xu/pao; giá cả thế giới 8,5 xu/pao…Ở những giá cả và số lượng ấy có hệ số co dãn của cầu và cung là Ed = -0,2; Es = 1,54. Yêu cầu: