Identification of Predictive Factors for Pathologic Complete Response in Rectal Cancer Patients Undergoing Neoadjuvant Treatment: A Retrospective Study.

Background: Colorectal cancer is a serious illness, with rectal cancer accounting for thirty percent of all cases. For patients diagnosed with rectal cancer, neoadjuvant downstaging chemoradiotherapy is often necessary due to advanced disease at presentation. However, for certain patients, neoadjuvant chemotherapy can result in a complete response, leading to the possibility of overtreatment during subsequent definitive surgery. Methods: In order to identify predictors for clinical or pathologic complete response, we conducted a retrospective study on 231 patients diagnosed with locally advanced rectal cancer who underwent neoadjuvant treatment. Results: Our results indicate that tumor characteristics remain the primary predictive factors for treatment response in rectal cancer patients. Specifically, we found that a complete pathologic response was more likely in patients with stage I/II disease compared to stage III/IV. However, we did not identify any statistically significant associations between radiotherapy characteristics (such as fractionation, treatment technique or total dose) and complete response rates. Conclusions: In conclusion, our study highlights the importance of tumor stage in predicting pathologic complete response following neoadjuvant chemoradiotherapy for rectal cancer patients. Other clinical and pathologic factors, such as tumor size, may also be important predictors of treatment response and should be explored in future studies.

Eosinophilic, polymorphic, and pruritic eruption associated with radiation therapy in two patients diagnosed with prostate cancer.

Key Clinical Message: We report 2 cases of EPPER diagnosed in patients who received radiation therapy and hormonal therapy for locally advanced prostate cancer. Both our patients developed this rare late toxicity, but early diagnosis and treatment of this adverse event offers a good prognosis, with no unnecessary interruptions of oncological treatment required. Abstract: Acute and late adverse events are a major problem for patients receiving radiation therapy. We describe two cases of eosinophilic, polymorphic, and pruritic eruption associated with radiotherapy (EPPER) syndrome, a very uncommon toxicity that affects cancer patients. Both our cases were men diagnosed with localized prostate cancer and were treated with radiotherapy and hormonal therapy. They developed EPPER during and after completing the total radiation dose. Multiple tests and skin biopsies were performed in order to find a superficial perivascular lymphohistiocytic infiltrate, confirming EPPER. The patients received corticotherapy and fully recovered after this treatment. There are a few more cases of EPPER reported in the literature, but the pathogenic mechanism is still unknown. EPPER is an important side effect of radiation therapy and it is probably underdiagnosed, due to its occurrence (usually after completing the oncological treatment).

Impact of the COVID-19 Pandemic on Treatment and Oncologic Outcomes for Cancer Patients in Romania.

BACKGROUND/AIM: This study aimed to assess the impact of the ongoing COVID-19 pandemic on cancer patients, known to be immune-compromised due to the disease itself, oncological treatments and adjuvant medicines use such as steroids. Overall survival was determined for patients with COVID-19 infection and stratification according to known comorbidities and complications was performed. PATIENTS AND METHODS: This prospective study included ninety cancer patients with COVID-19 confirmed by PCR testing performed before each cycle of chemotherapy or every two weeks during radiotherapy between May and December 2020 in two tertiary Cancer Centers. Demographic, cancer-related and SARS-CoV-2 infection data were collected and long-term oncologic outcome was assessed. RESULTS: Mean age of cancer patients diagnosed with SARS-CoV-2 was 59.7±12.1 years (range=30-83 years). Fifty-two (57.7%) were women. The most frequent cancer localization was breast (n=28, 31.1%) followed by colorectal (n=11, 12.2%) and lung cancer (n=8, 8.8%). Most patients infected with SARS-CoV-2 were diagnosed in stage IV of the disease (n=44, 48.9%) followed by stage III (n=19, 21.1%) and stage II disease (18.9%). Regarding comorbidities, the most common was hypertension (n=31) followed by cardiac dysfunction (n=23) and type II diabetes (n=13). Of 27 (30%) patients who needed hospitalization, 4 patients developed severe infection, 17 patients had mild symptoms and 6 patients were minimally symptomatic. After a median follow-up of 22.5 months, 5 patients (5.55%) died due to SARS-COV-2 infection, all stages III and IV. Median estimated overall survival was 14 months in patients who died because of COVID infection compared to 98 months in cancer-related mortality analysis (p<0.0001). Three deaths occurred during chemotherapy, 1 death in the chemoradiotherapy radiotherapy group. CONCLUSION: SARS-CoV-2 infection was associated with an excess mortality in our study population, especially in patients with advanced and metastatic disease and in those receiving immunosuppressive treatment such as chemotherapy and radiotherapy.