scholarly journals BCR-ABL V280G Mutation, Potential Role in Imatinib Resistance: First Case Report

2017 ◽  
Vol 11 ◽  
pp. 117955491770287 ◽  
Author(s):  
Ana P Azevedo ◽  
Alice Reichert ◽  
Celina Afonso ◽  
Maria D Alberca ◽  
Purificação Tavares ◽  
...  
Keyword(s):  
Case Report ◽  
Kinase Inhibitors ◽  
Philadelphia Chromosome ◽  
Kinase Domain ◽  
Prognostic Impact ◽  
Imatinib Resistance ◽  
Abl Tyrosine Kinase ◽  
First Case ◽  
Kinase Domain Mutation

Introduction: The identification of BCR-ABL expression as the defining leukemogenic event in chronic myeloid leukemia (CML) and the introduction of BCR-ABL tyrosine kinase inhibitors in 2001 have revolutionized disease management, leading to a reduction in mortality rates and accordingly an increase in the estimated prevalence of CML. Case report: Based on medical records and clinical follow-up, the authors present the case of a Philadelphia chromosome–positive CML patient who developed resistance to imatinib. Quantitative reverse transcription-polymerase chain reaction testing revealed a V280G BCR-ABL mutation. Discussion and conclusions: This is the first report describing a new BCR-ABL kinase domain mutation—V280G—that might be associated with resistance to imatinib. Approximately 15% to 30% of patients treated with imatinib discontinue treatment due to resistance or intolerance. More than 90 BCR-ABL mutations were detected so far, conferring variable degrees of drug resistance, with consequent clinical, therapeutic, and prognostic impact.

Analysis of Philadelphia Negative Clones Detected during Treatment with Tyrosine Kinase Inhibitors: A Study on 63 CML Cases.

Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 4541-4541
Author(s):  
Claudia Haferlach ◽  
Susanne Schnittger ◽  
Alice Fabarius ◽  
Armin Leitner ◽  
Wolfgang Kern ◽  
...  
Keyword(s):  
Tyrosine Kinase ◽  
Tyrosine Kinase Inhibitors ◽  
Kinase Inhibitors ◽  
Single Case ◽  
Clonal Evolution ◽  
Philadelphia Chromosome ◽  
Imatinib Treatment ◽  
Prognostic Impact ◽  
Chronic Myeloproliferative Disorder

Abstract The occurrence of Philadelphia chromosome negative (Ph−) clones in chronic myeloid leukemia (CML) patients treated with tyrosine kinase inhibitors have been reported in approximately 5% of cases. The pathogenesis of this phenomenon still remains unclear. The clinical relevance of these new clones remains to be clarified, as only occasional reports describe the presence of hematological dysplastic features or development of overt disease such as MDS or AML. We found 63 patients with CML that developed Ph− clones and performed in total 281 chromosome analyses (median: 4 analyses per case; range, 1–18). In total, 66 clonal abnormalities were detected. 60 cases showed only one aberration, in the remaining 3 cases 2 abnormalities were detected. Remarkably, no complex aberrant karyotypes were observed. Most frequent aberrations were gains and losses of whole chromosomes: +8 (n=35, 55.6%), +Y (n=3, 4.8%), +11 (n=2, 3.2%), +X (n=1, 1.6%), −Y (n=9, 14.3%), −7 (n=6, 9.5%). The following abnormalities were only observed in a single case: inv(Y)(p11.1q11.2); +1,der(1;7)(q10;p10); del(5)(q13q33); der(7)del(7)(p13)del(7)(q11.2); del(7)(q11q22); der(7;15)(q10;q10); t(8;11)(q22;q23); del(12)(p11p13); del(20)(q11q13). The majority of aberrations were unbalanced, only 2 balanced rearrangements were observed. No clonal evolution was found. Although this pattern of abnormalities resembles closest the pattern observed in MDS or Ph− chronic myeloproliferative disorder, only 1 case with −7 developed a MDS and subsequently an AML. Most frequently in addition to the Ph− clone a Ph+ clone and a normal clone was observed (n=86). In 8 analyses the Ph− clone was the only clone detected and in 60 analyses the Ph− clone was accompanied by a normal clone, in 10 by a Ph+ clone. In one case two different Ph− clones were observed during the course of the disease. For 34 patients detailed clinical data are available. All these patients were treated with imatinib, 7 patients subsequently received dasatinib and 3 nilotinib after imatinib treatment. The Ph− clone was observed after a median of 43 months (mo) after diagnosis and 20.5 mo after start of imatinib treatment, respectively. Dasatinib treatment was started 2, 3, 6, 10 and 12 mo prior to the first detection of the Ph− clone and in 1 case 5 mo after occurrence of the Ph− clone. Nilotinib treatment was started 6, 7 and 11 mo prior to the first detection of the Ph− clone. In 15 cases imatinib treatment was started within the first 4 mo after diagnosis. In these cases the Ph− clone was observed in median 13 mo after start of imatinib treatment (range: 4–64). Overall the 34 cases were monitored for 428 mo after occurrence of the Ph− clone (median=11.5 mo). In 6 cases the Ph− clone was lost during follow-up (in one case after allogeneic SCT). In conclusion: Ph− clones are stable over time in most cases. In the majority of cases only single, usually unbalanced abnormalities are observed. The size of the Ph− clone fluctuates and can also disappear. In most cases the Ph− clones seem to have no clinical impact. Longer follow-up is necessary to clarifiy the prognostic impact. So far the available data do not imply that the occurrence of Ph− clones per se should lead to changes in treatment strategy. However, close cytogenetic monitoring is recommended.

Philadelphia Chromosome (Ph)-Positive Leukemia Patients Who Fail ABL1 Tyrosine Kinase Inhibitors Without BCR-ABL1 Kinase Domain Point Mutations Demonstrate Sensitivity To PI3-K/AKT Inhibitors

Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 3994-3994
Author(s):  
Christopher A. Eide ◽  
Samantha L. Savage ◽  
Jade Bryant ◽  
Anupriya Agarwal ◽  
Daniel Bottomly ◽  
...  
Keyword(s):  
Research Funding ◽  
Kinase Inhibitors ◽  
Kinase Inhibitor ◽  
Ex Vivo ◽  
Philadelphia Chromosome ◽  
Point Mutations ◽  
Kinase Domain ◽  
Advisory Board ◽  
Clinical Resistance ◽  
Kinase Domain Mutation

Abstract Despite the impressive success of imatinib in chronic myeloid leukemia (CML), resistance to therapy remains an issue for approximately 15-20% of newly diagnosed chronic phase patients by 5 years and transient responses are the rule for patients with blast crisis CML or Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL). The most frequent and well-characterized mechanism of resistance to imatinib is acquisition of point mutations in the BCR-ABL1 kinase domain which compromise drug binding. This form of resistance is largely well-handled by the newer, more potent ABL1 inhibitors nilotinib, dasatinib, and ponatinib. However, in the remainder of patients with resistance sustained inhibition of BCR-ABL1 kinase activity is necessary but no longer sufficient to inhibit cell growth, implicating activation of additional, thus far, poorly understood BCR-ABL1-independent mechanisms of growth and survival. In an effort to identify and validate novel pathways important in BCR-ABL-independent resistance to ABL1 kinase inhibitors, we screened a cohort of 30 patients with CML or Ph+ ALL exhibiting clinical resistance to at least one ABL1 kinase inhibitor without evidence of a drug-resistant BCR-ABL1 kinase domain mutation. Following informed consent, fresh primary mononuclear cells were isolated from each sample by Ficoll gradient centrifugation, plated ex vivo in the presence of a panel of clinical and pre-clinical small-molecule kinase inhibitors, and assessed for effects on viability after 3 days. Ex vivo resistance to ABL1 kinase inhibitors largely tracked with clinical resistance profiles, and considerable variation in sensitivity profiles for other inhibitors was observed. Among these data, we found a particularly interesting subset of patients whose cells demonstrated ex vivo sensitivity to one or more PI3-K/AKT inhibitors (n=6/30; 20%) including PI-103, BEZ235, CAL-101, and MK-2206. These findings are consistent with previous studies demonstrating PI3-K activation in select ABL1 kinase inhibitor-resistant CML cell lines (Quentmeier et al., J Hem Onc 2011) and in response to imatinib in pre-overt resistance (Burchert et al., Leukemia 2005). Among the effective PI3-K/AKT inhibitors, the most prominent were the dual class IA PI3-K/mTOR inhibitor PI-103 (IC50 range:38-110 nM) and BEZ235 (IC50 range: 20-210 nM). To further interrogate the mechanism(s) behind dependence on this pathway, samples of interest were analyzed by deep sequencing using a custom capture library encompassing ∼2000 kinases, phosphatases, and adaptor proteins. However, in contrast to previous reports of activating PIK3CA mutations in imatinib-resistant KCL-22 cells, we found PIK3CA to be wild-type in all samples. Despite a common sensitivity to PI3-K/AKT pathway inhibition, we found sequence variants were somewhat heterogeneous and direct kinase targets in this pathway were wild-type, suggesting other causative lesions which activate this pathway. Variants were prioritized based on known associations to this pathway, generated and evaluated in vitro for Ba/F3 cell transformation capacity, and validated for pathway activation and kinase inhibitor sensitivity. These results will be presented. Taken together, our findings suggest that a subset of patients with Ph+ leukemia who become refractory to ABL1 kinase inhibitors without a BCR-ABL1 kinase domain mutation demonstrate acquired dependence on the PI3-K/AKT axis, warranting further investigation of inhibitors of this pathway alone and in combination with ABL1 inhibitors as a molecularly targeted therapeutic strategy in patients. Disclosures: Off Label Use: Ruxolitinib - a JAK1/2 inhibitor that we propose can be used off-label for disease management of CSF3R-mutant neutrophilic leukemia. Deininger:BMS: Consultancy, Research Funding; ARIAD: advisory board, advisory board Other, Consultancy; Novartis: advisory board, advisory board Other, Consultancy, Research Funding; Celgene: Research Funding; Gilead: Research Funding. Tyner:Incyte Corporation: Research Funding. Druker:Novartis, Bristol-Myers Squibb, ARIAD & Incyte: Clin trial funding. OHSU holds contracts; Druker receives no salary/lab research funds. OHSU & Druker have financial interest in MolecularMD; technology used in some studies licensed to MolecularMD. This conflict has been reviewed and managed by OHSU. Other.

scholarly journals Kinase Domain Mutants of Bcr-Abl Exhibit Altered Transformation Potency, Kinase Activity, and Substrate Utilization, Irrespective of Sensitivity to Imatinib

2006 ◽  
Vol 26 (16) ◽  
pp. 6082-6093 ◽  
Author(s):  
Ian J. Griswold ◽  
Mary MacPartlin ◽  
Thomas Bumm ◽  
Valerie L. Goss ◽  
Thomas O'Hare ◽  
...  
Keyword(s):  
Kinase Activity ◽  
Kinase Inhibitors ◽  
Philadelphia Chromosome ◽  
Kinase Domain ◽  
Atp Binding ◽  
Loss Of Function ◽  
Imatinib Resistance ◽  
Major Mechanism ◽  
Abl Kinase ◽  
Binding Loop

ABSTRACT Kinase domain (KD) mutations of Bcr-Abl interfering with imatinib binding are the major mechanism of acquired imatinib resistance in patients with Philadelphia chromosome-positive leukemia. Mutations of the ATP binding loop (p-loop) have been associated with a poor prognosis. We compared the transformation potency of five common KD mutants in various biological assays. Relative to unmutated (native) Bcr-Abl, the ATP binding loop mutants Y253F and E255K exhibited increased transformation potency, M351T and H396P were less potent, and the performance of T315I was assay dependent. The transformation potency of Y253F and M351T correlated with intrinsic Bcr-Abl kinase activity, whereas the kinase activity of E255K, H396P, and T315I did not correlate with transforming capabilities, suggesting that additional factors influence transformation potency. Analysis of the phosphotyrosine proteome by mass spectroscopy showed differential phosphorylation among the mutants, a finding consistent with altered substrate specificity and pathway activation. Mutations in the KD of Bcr-Abl influence kinase activity and signaling in a complex fashion, leading to gain- or loss-of-function variants. The drug resistance and transformation potency of mutants may determine the outcome of patients on therapy with Abl kinase inhibitors.

scholarly journals The Interface between BCR-ABL-Dependent and -Independent Resistance Signaling Pathways in Chronic Myeloid Leukemia

2012 ◽  
Vol 2012 ◽  
pp. 1-19 ◽  
Author(s):  
Gabriela Nestal de Moraes ◽  
Paloma Silva Souza ◽  
Fernanda Casal de Faria Costas ◽  
Flavia Cunha Vasconcelos ◽  
Flaviana Ruade Souza Reis ◽  
...  
Keyword(s):  
Chronic Myeloid Leukemia ◽  
Tyrosine Kinase ◽  
Myeloid Leukemia ◽  
Kinase Inhibitors ◽  
Kinase Inhibitor ◽  
Philadelphia Chromosome ◽  
Resistance Mechanisms ◽  
Imatinib Resistance ◽  
Abl Tyrosine Kinase ◽  
Alternative Drug

Chronic myeloid leukemia (CML) is a clonal hematopoietic disorder characterized by the presence of the Philadelphia chromosome which resulted from the reciprocal translocation between chromosomes 9 and 22. The pathogenesis of CML involves the constitutive activation of the BCR-ABL tyrosine kinase, which governs malignant disease by activating multiple signal transduction pathways. The BCR-ABL kinase inhibitor, imatinib, is the front-line treatment for CML, but the emergence of imatinib resistance and other tyrosine kinase inhibitors (TKIs) has called attention for additional resistance mechanisms and has led to the search for alternative drug treatments. In this paper, we discuss our current understanding of mechanisms, related or unrelated to BCR-ABL, which have been shown to account for chemoresistance and treatment failure. We focus on the potential role of the influx and efflux transporters, the inhibitor of apoptosis proteins, and transcription factor-mediated signals as feasible molecular targets to overcome the development of TKIs resistance in CML.

Combination of the Hypercvad Regimen with Dasatinib in Patients with Relapsed Philadelphia Chromosome (Ph) Positive Acute Lymphoblastic Leukemia (ALL) or Lymphoid Blast Phase of Chronic Myeloid Leukemia (CML-LB)

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 2578-2578 ◽  
Author(s):  
Theresa Liu-Dumlao ◽  
Susan O'Brien ◽  
Jorge E. Cortes ◽  
Deborah A. Thomas ◽  
Stefan Faderl ◽  
...  
Keyword(s):  
Research Funding ◽  
Kinase Inhibitors ◽  
Lymphoblastic Leukemia ◽  
Philadelphia Chromosome ◽  
High Dose ◽  
Molecular Response ◽  
Cell Transplant ◽  
Imatinib Resistance ◽  
Platelet Recovery

Abstract Abstract 2578 Prognosis for patients (pts) with Ph+ ALL has improved significantly with the introduction of tyrosine kinase inhibitors (TKI). Dasatinib is ∼325 times more potent than imatinib, and has shown activity in pts with imatinib resistance or intolerance, both in CML and Ph+ ALL. From 9/2006, pts with relapsed Ph+ ALL or CML-LB received dasatinib 100 mg po daily for the first 14 days of each of 8 cycles of alternating hyperCVAD, and high-dose cytarabine with methotrexate. Patients in complete remission (CR) continued to receive maintenance with dasatinib 100 mg po daily, with vincristine and prednisone monthly for 2 years, followed by dasatinib indefinitely. All patients proceeded to an allogeneic stem cell transplant as soon as feasible. From 8/2009, dasatinib dose was modified to 100mg po daily for the first 14 days of the first cycle, then at 70mg po daily continuously. Pts also received Rituximab on Days 1 and 11 of each of the first 4 cycles of therapy. A total of 32 pts with relapsed Ph+ ALL (n=18) or CML-LB (n=14) have received a median of 3 cycles (range=1–8 cycles). Twenty-three pts were treated on the initial regimen and 9 pts on the modified version. Median age was 50 yrs (range 21–77). Median number of prior regimens was 1 (range=1–2): hyperCVAD plus imatinib (n=10, 3 had transplant in first CR), other combination chemotherapy (n=12), monotherapy with TKI other than dasatinib (n=8), and investigational agents (n=2). Median WBC at start of treatment was 9.8 × 109/L (range=0.3–295.5 × 109/L). Median bone marrow blast percentage was 72% (range 0–97%; 1 pt had solitary CNS relapse). Eight (25%) patients had CNS involvement. Pre-treatment ABL mutations noted in 9 pts included: T315I(n=4), Y253F(n=1), Y253H(n=4), F359V(n=1), E459K(n=1), E255K(n=1), F317L(n=3), M351T(n=1). The overall response rate was 94%, with 23 pts (72%) achieving CR, and 7(22%) CR with incomplete platelet recovery (CRp). One pt died during induction. One pt had progressive disease. Twenty-five pts (83%) achieved complete cytogenetic remission after one cycle of therapy. Overall, 13 pts (43%) achieved complete molecular response, and 10 pts (33%) major molecular response (i.e., BCR-ABL/ABL<0.1%). Nine patients proceeded to allogeneic transplantation (ALL n=2, CML-LB n=7); one previously transplanted patient with ALL received donor lymphocyte infusion. Grade 3/4 toxicities included bleeding (GI, GU, and subdural hematomas), pleural effusions, pericardial effusions, infections, diarrhea, hypophosphatemia, hypocalcemia, elevated transaminases, and hyperbilirubinemia. The median follow-up for pts with CML-LB is 85 wks (range=12–209 wks); 3-yr OS is 76% (median not reached); and, 82% remain in CR at 3 yrs [median CR duration (CRD) not reached]. For ALL pts, median follow-up was 139 wks (range=74–175 wks); 3-yr OS is 33% (median=42 wks); and, 30% remain in CR at 3 yrs (median CRD=38 wks). The outcomes were the same for pts with CML-LB who did or did not receive a transplant (3-yr OS 83% for both cohorts). Among pts with ALL, outcome was better for those who underwent transplant (2 of 2 alive at 3 yrs as opposed to 4 of 16 without transplant). Conclusion: The combination of HyperCVAD regimen with dasatinib is effective in patients with relapsed Ph+ ALL and CML-LB. Disclosures: Cortes: Novartis: Consultancy, Research Funding; BMS: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; Ariad: Consultancy, Research Funding. Jabbour:Novartis: Honoraria; Pfizer: Honoraria; BMS: Honoraria. Kantarjian:BMS: Research Funding. Ravandi:Bristol Myers Squibb: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Novartis: Honoraria.

scholarly journals First reported case of penile prosthesis infection from brucellosis: case report

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Nabil Nabil Moohialdin ◽  
Ahmad Shamsodini ◽  
Steven K. Wilson ◽  
Osama Abdeljaleel ◽  
Ibrahim Alnadhari ◽  
...  
Keyword(s):  
Case Report ◽  
Broad Spectrum ◽  
Surgical Intervention ◽  
Penile Prosthesis ◽  
Raw Milk ◽  
Prosthesis Infection ◽  
Case Presentation ◽  
First Case ◽  
Milk Ingestion

Abstract Background Infection after the penile prosthesis can be devastating to both the patient and surgeon with various complications and consequences. After introduction of antibiotic-coated implants, the rate of infection has dramatically decreased, but still we see uncommon organisms causing infection. We present a first case report of penile prosthesis infection by brucellosis due to raw milk ingestion. To our knowledge, this is the first reported case of brucellosis penile prosthesis infection. Case presentation We present a first case report of penile prosthesis infection by brucellosis due to raw milk ingestion. A 75-year-old, diabetic male patient presented with penile prosthesis infection 5 months post-penile exchange surgery due to mechanical malfunctioning of 2-piece penile prosthesis which was inserted 11 years ago. The initial treatment with broad spectrum antibiotics did not subside the infection. After diagnosis of brucellosis, the antibiotic was changed to anti-brucellosis (Rifampicin + Tetracycline). The patient improved dramatically and was discharged home with smooth follow-up course. Conclusion Brucellosis can cause infection of penile prosthesis and can be treated with anti-brucellosis antibiotics without necessitating surgical intervention and removal of prosthesis.

CONGENITAL MICROGASTRIA, A CASE REPORT WITH A 26-YEAR FOLLOW-UP

PEDIATRICS ◽  
1973 ◽  
Vol 51 (6) ◽  
pp. 1037-1041
Author(s):  
Eugene Blank ◽  
Alvin Chisolm
Keyword(s):  
Case Report ◽  
English Language ◽  
Normal Adult ◽  
Healthy Children ◽  
Adult Size ◽  
Persistent Vomiting ◽  
First Case ◽  
English Language Journal ◽  
Roentgenographic Examination

A 27-year-old woman had congenital microgastria, which was apparent in roentgenographic examination when she was 1 year of age. Despite inability to eat anything but pureed foods for the first 13 years and despite persistent vomiting during that time, she has reached normal adult size and has three healthy children. This report represents two firsts: the first case of congenital microgastria in an English language journal of pediatrics and the first with a long follow-up.

scholarly journals Sequence of Second Generation Tyrosine Kinase Inhibitors (TKIs) in the Treatment of Patients with Chronic Phase Philadelphia Chromosome-Positive Chronic Myeloid Leukaemia - Real World Experience in the UK

Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 3434-3434
Author(s):  
Jenny Byrne ◽  
Joanne Ewing ◽  
Adam J. Mead ◽  
Heather Oakervee ◽  
Gavin Campbell ◽  
...  
Keyword(s):  
Real World ◽  
Research Funding ◽  
Kinase Inhibitors ◽  
Philadelphia Chromosome ◽  
Chronic Phase ◽  
Educational Support ◽  
Third Line ◽  
The Uk ◽  
Observation Period

Background: The prognosis of patients with chronic-phase myeloid leukaemia (CML) has drastically improved with the introduction of tyrosine kinase inhibitors (TKIs). During the period of this study, availability of treatment options in the UK were limited and determined by the date reimbursement was granted and when restrictions on the use of individual licensed TKIs were removed. Currently, imatinib, nilotinib and dasatinib are reimbursed for 1st line treatment (1L) with bosutinib and ponatinib reimbursed for 2nd line or subsequent lines of treatment. Aims: The primary aim was to determine the sequence of 2nd generation (2G) TKIs (nilotinib, dasatinib, bosutinib) in patients with chronic-phase Philadelphia chromosome-positive (Ph+) CML who had received their 3rd and subsequent lines of TKIs in a real world UK setting. Methods: A multi-centre, retrospective, chart review was undertaken in the UK from November 2018 to July 2019. To be included, patients had to be aged ≥18 with chronic phase Ph+ CML who had started a third line of TKI treatment between June 2013 and February 2018. Patients were excluded if they had &gt;3-month gap in treatment before progression or relapse, or were treated with a 2G TKI within an interventional clinical study during third line treatment. At each line, molecular responses, cytogenetic responses, duration of therapy and reasons for stopping were recorded until the date of last hospital follow-up or death. Overall survival was determined from date of initiation of 3rd or 4th line TKI therapy until death by any cause. Results: An interim analysis was undertaken for 65 patients from 11 sites. Median age at diagnosis was 53.0 years. 50.8% were male and 49.2% were female. Of these 65 patients, 48 patients were still being treated at the end of observation (29 patients in 3rd, 18 in 4th and 1 in 5th line). Patient demographics are typical of CML populations. Throughout the study, imatinib was 1L treatment of choice for the majority of patients (57/65; 88%) and this held true (21/22; 95%) even when nilotinib and dasatinib were reimbursed for use 1L. Nilotinib was most commonly prescribed in 2L (42/65; 56%), reflecting the greater availability of this drug during the study period. Dasatinib and bosutinib constituted 22% and 4% respectively of 2L treatments. The most frequent sequencing pathway observed was I1-N2-D3 (Table 1, Fig. 1). 19 other pathways at low frequencies were observed across 39 patients. 97% of patients (63/65) achieved an optimal response at any time as defined by the 2013 ELN guidelines (Table 2) during the observation period. Of the 31 (48%) patients who were resistant to 1L, 24 (37%) achieved a response in 2L and of the 7 (10.7%) patients who were resistant to 1L and 2L, 5 (7.7%) achieved a response in 3L. At the end of the observation period, only 2 (3%) patients never achieved a response. In 3L: 29 (45%) patients are still ongoing, 4 died, 3 were lost to follow up and 3 underwent transplantation. In 4L: 18 (69%) are still ongoing, 3 died, and 3 underwent transplantation. Median overall survival for L3 was 21 months and 12 months in L4. In all lines of treatment, the main cause of switching away from imatinib was lack of efficacy (61%), and for all 2G TKIs the main cause was intolerance (66%). During the period when only imatinib was available in 1L, median duration of 1L treatment was longer at 26 months for patients failing to respond vs 9 months when nilotinib and dasatinib were also available. Conclusions: In this UK real-world study, for patients requiring 3 or more lines of treatment, sequencing of TKIs may have been determined by drug reimbursement. As availability of TKIs increased, time to switch therapy decreased for all patients, suggesting that clinicians were following guidelines and switching treatments more readily. However, initial 1L prescribing behaviour has not changed in this observation period despite better access to 2G TKI, and there appears to be a trend of physicians preferring to repeat 2G TKIs treatment sequences that yield a favourable outcome. Disclosures Byrne: Ariad/Incyte: Honoraria, Speakers Bureau. Ewing:Novartis: Honoraria, Other: Meeting attendance sponsorship ; Bristol Myers-Squibb: Other: Meeting attendance sponsorship . Mead:Novartis: Consultancy, Honoraria, Other: Travel/accommodation expenses, Research Funding, Speakers Bureau; Bristol Myers-Squibb: Consultancy; CTI: Honoraria, Research Funding; Pfizer: Consultancy; Celgene: Consultancy, Research Funding. Oakervee:Novartis: Honoraria; Pfizer: Honoraria; Bristol Myers-Squibb: Honoraria. Campbell:Novartis: Consultancy, Other: Educational support; Takeda: Consultancy, Other: Educational support; Bristol Myers-Squibb: Other: Educational support; Roche: Other: Educational support; Celgene: Other: Educational support. Amott:Celgene: Other: Meeting attendance sponsorship . Goringe:Novartis: Consultancy, Other: Speaker. Heartin:Celgene: Other: Speaker's fees; Janssen: Other: Speaker's fees; Takeda: Other: Speaker's fees; Alexion: Other: Speaker's fees; Novartis: Other: Speaker's fees. Dimitriadou:Celgene: Other: Meeting attendance sponsorship . Arami:Takeda: Other: Meeting attendance sponsorship ; Gilead: Other: Meeting attendance sponsorship ; Roche: Other: Meeting attendance sponsorship ; Celgene: Other: Meeting attendance sponsorship . Neelakantan:Novartis: Honoraria; Celgene: Honoraria. Frewin:Novartis: Consultancy, Other: Meeting attendance sponsorship ; AbbVie: Other: Meeting attendance sponsorship . Pillai:Celgene: Honoraria. De Lavallade:BMS: Honoraria, Research Funding, Speakers Bureau; Pfizer: Honoraria, Speakers Bureau; Novartis: Honoraria, Speakers Bureau; Incyte biosciences: Honoraria, Research Funding, Speakers Bureau. Cross:Novartis: Consultancy, Research Funding; Incyte: Consultancy. Thompson:Incyte: Employment.

scholarly journals Teratoma of larynx: case report

2021 ◽  
Vol 7 (10) ◽  
pp. 1700
Author(s):  
Rakesh Srivastava ◽  
Vini Tandon
Keyword(s):  
Carbon Dioxide ◽  
Case Report ◽  
Germ Cells ◽  
Carbon Dioxide Laser ◽  
Rare Case ◽  
Histopathological Examination ◽  
Flexible Laryngoscopy ◽  
First Case ◽  
Congenital Teratoma

<p class="abstract">Teratomas are embryonal neoplasm arises from totipotent germ cells. They are having tissues from all the three blastodermic layers. There are various locations of congenital teratoma. Naso-oropharyngeal site teratoma are either sessile or pedunculated. We describe a rare case of laryngeal teratoma in a five years old patient presented with change in voice and breathing difficulty. On flexible laryngoscopy, it appeared like supraglottic cyst but on CT scan it was confirmed as teratoma. Pre-operative tracheostomy and transoral carbon dioxide laser assisted excision done. Histopathological examination showed osteoid trabeculae, chondroid tissue with loose myxoid islands and adipose tissue. No recurrence of tumor on 18 months follow-up. This is the first case report of pediatric larynx teratoma reported in present century.</p>

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