Tayfur Toptas

Dr. Tayfur Toptas

orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 May 2023 in Hematological Oncology
Verified
Journal Article
Open access
EAElif Birtas Atesoglu
Elif Birtas Atesoglu
ZGZafer Gulbas
Zafer Gulbas
AUAnt Uzay
Ant Uzay
MOMuhit Ozcan
Muhit Ozcan
FOFahir Ozkalemkas
Fahir Ozkalemkas
BFBurhan Ferhanoglu
Burhan Ferhanoglu
Glofitamab is a CD3xCD20 bi‐specific antibody with two fragments directed to the CD20 antigen and a single CD3‐binding fragment. Encouraging response and survival rates were recently reported in a pivotal phase II expansion trial conducted in patients with relapsed/refractory (R/R) B‐cell lymphoma. However, the real‐world data of patients of all ages with no strict selection criteria are still lacking. Herein, this retrospective study aimed to evaluate the outcomes of diffuse large B‐cell lymphoma (DLBCL) patients who received glofitamab via compassionate use in Turkey. Forty‐three patients from 20 centers who received at least one dose of the treatment were included in this study. The median age was 54 years. The median number of previous therapies was 4, and 23 patients were refractory to first‐line treatment. Twenty patients had previously undergone autologous stem cell transplantation. The median follow‐up time was 5.7 months. In efficacy‐evaluable patients, 21% and 16% of them achieved complete response and partial response, respectively. The median response duration was 6.3 months. The median progression‐free survival (PFS) and overall survival (OS) was 3.3 and 8.8 months, respectively. None of the treatment‐responsive patients progressed during the study period, and their estimated 1‐year PFS and OS rate was 83%. The most frequently reported toxicity was hematological toxicity. Sixteen patients survived, while 27 died at the time of the analysis. The most common cause of death was disease progression. One patient died of cytokine release syndrome during the first cycle after receiving the first dose of glofitamab. Meanwhile, two patients died due to glofitamab‐related febrile neutropenia. This is the largest real‐world study on the effectiveness and toxicity of glofitamab treatment in R/R DLBCL patients. The median OS of 9 months seems promising in this heavily pretreated group. The toxicity related mortality rates were the primary concerns in this study.

23 November 2015 in Annals of Hematology
Verified
Journal Article
Closed access
PDF file
BDBurak Deveci
Burak Deveci
AKAyşegül Uğur kurtoğlu
Ayşegül Uğur kurtoğlu
EKErdal Kurtoglu
Erdal Kurtoglu
OSOzan Salim
Ozan Salim
TTTayfur Toptas
Tayfur Toptas

25 June 2021 in Hematological Oncology
Verified
Journal Article
Closed access
PDF file
OAOlga Meltem Akay
Olga Meltem Akay
MOMurat Ozbalak
Murat Ozbalak
MPMustafa Pehlivan
Mustafa Pehlivan
BYBirol Yildiz
Birol Yildiz
AUAnt Uzay
Ant Uzay
BFBurhan Ferhanoglu
Burhan Ferhanoglu

25 July 2014 in Oncology Letters
Verified
Journal Article
Open access
PDF file
TTTayfur Toptas
Tayfur Toptas
IKIsik Kaygusuz-Atagunduz
Isik Kaygusuz-Atagunduz
HKHaluk Tarik Kani
Haluk Tarik Kani
CACafer Adiguzel
Cafer Adiguzel
TFTulin Firatli-Tuglular
Tulin Firatli-Tuglular
BK‑virus (BKV) is an important etiological agent for late‑onset hemorrhagic cystitis (HC) in patients undergoing hematopoietic stem cell transplantation. Late‑onset HC causes significant morbidity among these patients. Therapeutic approaches remain predominantly symptomatic. Several treatment options have been used with variable success rates. Cidofovir has the highest specificity against BKV; however, its lack of availability in the majority of countries, high costs and potential nephrotoxic effects limit its use. The present study reports three cases of severe and prolonged BKV‑associated HC (BKHC). HC was resolved in all three of the patients using oral levofloxacin. Thus, levofloxacin may be an effective treatment modality for achieving complete clinical and molecular response in patients with refractory, severe BKHC.

1 January 2016 in Blood Coagulation & Fibrinolysis
Verified
Journal Article
Closed access
AEAli Eser
Ali Eser
TTTayfur Toptas
Tayfur Toptas
OKOsman Kara
Osman Kara
ASAslihan Sezgin
Aslihan Sezgin
FNFigen Noyan–Atalay
Figen Noyan–Atalay
TFTulin Firatli-Tuglular
Tulin Firatli-Tuglular
Eltrombopag was used in patients with chronic primary immune thrombocytopenia (ITP) who did not tolerate or were refractory to two or more previous treatments. The primary aims of the study were to determine the efficacy and safety of long-term eltrombopag treatment. Data were extracted from medical chart records retrospectively. Platelet count of at least 50 000/μl at any time point during the treatment was defined as the ‘response’. Median duration of eltrombopag treatment was 29 weeks (11–74). The number of patients who had a platelet count of at least 50 000/μl at any time point was 26 (83.9%). The response was achieved by the second week in most of the patients. Concomitant ITP medications were withdrawn in nine out of the 11 patients. Eltrombopag was discontinued in one patient due to sustained response despite discontinuation of the treatment. Age, sex, concomitant ITP treatments, and previous ITP treatment failures had no impact on the treatment response. The treatment was discontinued due to thrombosis in only four patients. Four patients experienced a minor bleeding event. Hepatotoxicity and all other adverse events were mild and manageable. Eltrombopag is effective, safe, and well tolerated in the long-term treatment of chronic ITP patients.

10 July 2014 in Case Reports in Medicine
Verified
Journal Article
Open access
PDF file
HAHarun Arslan
Harun Arslan
SASibel Ada
Sibel Ada
SÇSebahattin Çelik
Sebahattin Çelik
TTTayfur Toptas
Tayfur Toptas
Postpartum ovarian vein thrombosis (POVT), which generally occurs 2–15 days postpartum, is a rare complication. It can be confused with acute appendicitis, pelvic infection, ovarian torsion, tubo-ovarian abscess, and pyelonephritis. It is associated with morbidity and mortality. Here, we present a patient with postpartum OVT and IVC diagnosed by US and CT findings. She was treated successfully with no further need for any interventional procedures.