Pedro Simões

Dr. Pedro Simões

orcid

Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

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

Representative Publications

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9 July 2022 in Surgical Oncology
Verified
Journal Article
Open access
PSPedro Simões
Pedro Simões
GFGonçalo Fernandes
Gonçalo Fernandes
BCBeatriz Costeira
Beatriz Costeira
MMMadalena Machete
Madalena Machete
CBCarlota Baptista
Carlota Baptista
JPJosé L Passos-Coelho
José L Passos-Coelho
Guidelines recommend regional lymphadenectomy with a lymph node yield (LNY) of at least 12 lymph nodes (LN) for adequate colon cancer (CC) staging. LNY ≥22LN may improve survival, especially in right-sided CC [Lee et al., Surg Oncol, 27(3), 2018]. This multicentric retrospective cohort study evaluated the impact of LNY and tumor laterality on CC staging and survival. Patients with stage I-III CC that underwent surgery from 2012 to 2018 were grouped according to LNY: <22 and ≥ 22. Primary outcomes were LN positivity (N+ rate) and disease-free survival (DFS). Overall survival (OS) was the secondary outcome. Exploratory analyses were performed for laterality and stage. We included 795 patients (417 < 22LN, 378 ≥ 22LN); 53% had left-sided CC and 29%/37%/38% had stage I/II/III tumors. There was no association between LNY ≥22LN and N+ rate after adjustment for grade, T stage, lymphovascular invasion (LVI) and perineural invasion; a trend for a higher N+ rate in left-sided CC was identified (interaction p = 0.033). With a median follow-up of 63.6 months for DFS and 73.2 months for OS, 254 patients (31.9%) relapsed and 207 (26.0%) died. In multivariate analysis adjusted for age, ASA score, laparoscopic approach, T/N stage, mucinous histology, LVI and adjuvant chemotherapy, LNY ≥22LN was significantly associated with both DFS (HR 0.75, p = 0.031) and OS (HR 0.71, p = 0.025). Restricted cubic spline analysis showed a more significant benefit for right-sided CC. LNY ≥22LN was associated with longer DFS and OS in patients with operable CC, especially for right-sided CC.

6 March 2025 in Cancers
Verified
Journal Article
Open access
PDF file
LGLisa Gonçalves
Lisa Gonçalves
HGHelena Guedes
Helena Guedes
Ana FortunaAna Fortuna
Ana Fortuna
TLTânia Lemos
Tânia Lemos
JGJoão Gramaça
João Gramaça
LCLuis Costa
Luis Costa
Background: Platinum-based chemotherapy (PBC) followed by avelumab maintenance is a treatment option for patients with advanced urothelial carcinoma (aUC) patients. However, the optimal treatment sequencing in the era of antibody–drug conjugates (ADCs) is yet to be determined. Recent studies suggest that the timing of immune checkpoint inhibitor (ICI) administration may impact patient outcomes, with a potential benefit from morning infusions. Methods: This retrospective study included 105 patients with aUC treated with avelumab in Portugal and intended to assess the safety and clinical outcomes (progression-free survival (PFS), overall survival (OS), and overall response rate (ORR)) and evaluate the impact of treatment timing (morning vs. afternoon) on patient outcomes. Results: The median follow-up from the start of avelumab was 17.7 months, the median PFS (mPFS) was 9.8 months (95% CI 4.9–14.7), and the median OS (mOS) was 39.5 months (95% CI 13.2–65.7). Immune-related adverse events (irAEs) were reported in 65.8% of patients, with 6.7% experiencing G3 irAEs. Among those who received a subsequent-line ADC upon disease progression (43%), the mOS from the start of avelumab was 23.1 months (95% CI 9.2–37.0). Multivariate analysis showed significant improvement in mOS with morning avelumab infusions (HR 0.35, 95% CI: 0.12–0.97, p = 0.042) and a trend towards improved mPFS (HR 0.43, 95% CI: 0.179–1.02, p = 0.055). Conclusions: This study confirms the clinical efficacy and safety of avelumab, showing improved outcomes over JAVELIN Bladder 100 and suggesting that morning infusions may offer a survival benefit in this context. Further research is needed to optimize treatment sequencing and explore the impact of infusion timing in ICI strategies.

25 May 2022 in Archives of Endocrinology and Metabolism
Verified
Journal Article
Open access
PDF file
NBNádia Mourinho Bala
Nádia Mourinho Bala
PSPedro Simões
Pedro Simões
JAJosé Maria Aragüés
José Maria Aragüés
RVRicardo Veiga
Ricardo Veiga
SGSílvia Guerra
Sílvia Guerra
CVCristina Valadas
Cristina Valadas
SUMMARY Thyroid angiosarcoma is an extremely rare malignancy, which occurs more frequently in the alpine region, likely associated with iodine deficiency and endemic goiter. This is an aggressive neoplasm that usually harbors a poor prognosis. We report the case of a 49-year-old Portuguese female patient presenting with a large nodule in the anterior neck region, with rapid growth and associated dysphonia. The neck ultrasound showed a hypoechogenic and heterogeneous thyroid nodule, with a larger axis of 44 mm. The fine [...] SUMMARY Thyroid angiosarcoma is an extremely rare malignancy, which occurs more frequently in the alpine region, likely associated with iodine deficiency and endemic goiter. This is an aggressive neoplasm that usually harbors a poor prognosis. We report the case of a 49-year-old Portuguese female patient presenting with a large nodule in the anterior neck region, with rapid growth and associated dysphonia. The neck ultrasound showed a hypoechogenic and heterogeneous thyroid nodule, with a larger axis of 44 mm. The fine

31 October 2022 in BMJ Case Reports
Verified
Journal Article
Closed access
PDF file
LLLuísa Leal-Costa
Luísa Leal-Costa
JGJoão Godinho
João Godinho
PSPedro Simões
Pedro Simões
MCMafalda Casa-Nova
Mafalda Casa-Nova
We report the case of a woman in her 70s with a stage IVA small cell neuroendocrine carcinoma of the vagina. The patient started chemotherapy with cisplatin and etoposide followed by concurrent chemoradiotherapy and adjuvant chemotherapy. Pelvic MRI after completion of treatment did not show residual disease. Three years and 8 months after definitive treatment, the patient remains on regular follow-up without evidence of disease.

10 July 2026 in Breast Cancer Research and Treatment
Verified
Journal Article
Closed access
DMDiogo Martins-Branco
Diogo Martins-Branco
SMSoraia Lobo Martins
Soraia Lobo Martins
PAPhilippe Aftimos
Philippe Aftimos
BPBernardo Alves Pereira
Bernardo Alves Pereira
Leonor Vasconcelos de MatosLeonor Vasconcelos de Matos
Leonor Vasconcelos de Matos
EAEvandro de Azambuja
Evandro de Azambuja

28 December 2023 in Cancers
Verified
Journal Article
Open access
PDF file
MRMariana Rebordão-Pires
Mariana Rebordão-Pires
MEMarta F Estrada
Marta F Estrada
AGAntónio Gomes
António Gomes
FSFilipa Silva
Filipa Silva
CBCarlota Baptista
Carlota Baptista
Rita FiorRita Fior
Rita Fior
(1) Background: Relapsed HGSOC with ascites and/or pleural effusion is a poor-prognostic population and poorly represented in clinical studies. We questioned if these patients are worth treating. In other words, if these patients received the most effective treatment, would it change the course of this disease? To our knowledge this is the first real-life study to evaluate this question in this low-survival population. (2) Methods: To tackle this question we performed a retrospective, multi-centric, real-life study, that reviewed relapsed HGSOC patients with ascites and/or pleural effusion. Our rationale was to compare the OS of two groups of patients: responders, i.e., patients who had an imagological response to treatment (complete/partial response/stable disease, RECIST criteria) versus non-responders (no response/progression upon treatment). We evaluated the predictive value of clinical variables that are available in a real-life setting (e.g., staging, chemotherapy, surgery, platinum-sensitivity). Multivariate logistic regression and survival analysis was conducted. A two-step cluster analysis SPSS tool was used for subgroup analysis. Platinum sensitivity/resistance was also analyzed, as well as multivariate and cluster analysis. (3) Results: We included 57 patients, 41.4% first line responders and 59.6% non-responders. The median OS of responders was 23 months versus 8 months in non-responders (p < 0.001). This difference was verified in platinum-sensitive (mOS 28 months vs. 8 months, p < 0.001) and platinum-resistant populations (mOS 16 months vs. 7 months, p < 0.001). Thirty-one patients reached the second line, of which only 10.3% responded to treatment. Three patients out of thirty-one who did not respond in the first line of relapse, responded in the second line. In the second line, the mOS for the responders’ group vs. non-responders was 31 months versus 13 months (p = 0.02). The two step cluster analysis tool found two different subgroups with different prognoses based on overall response rate, according to consolidation chemotherapy, neoadjuvant chemotherapy, FIGO staging and surgical treatment. Cluster analysis showed that even patients with standard clinical and treatment variables associated with poor prognosis might achieve treatment response (the opposite being also true). (4) Conclusions: Our data clearly show that relapsed HGSOC patients benefit from treatment. If given an effective treatment upfront, this can lead to a ~3 times increase in mOS for these patients. Moreover, this was irrespective of patient disease and treatment characteristics. Our results highlight the urgent need for a sensitivity test to tailor treatments and improve efficacy rates in a personalized manner.