Cutaneous Reactions Following Anticancer Drug Therapy in a Tertiary Care Centre

ABSTRACT Introduction: Cutaneous reactions are dermatologica! abnormalities that can occur after anticancer drug therapy in cancer patients. Cutaneous reactions can range from mild dermatological disorders to life-threatening medical conditions and may worsen a patient's quality of life. This study aimed to find out the prevalence of cutaneous reactions following anticancer drug therapy in a tertiary care centre. Methods: A descriptive cross-sectional study was conducted among cancer patients following anticancer therapy in the outpatient department of dermatology of a tertiary care centre between 1 October 2021 to 30 December 2022. Convenience sampling was done. The point estimate was calculated at a 95% Confidence Interval. Results: Among 3,288 patients, the prevalence of cutaneous reactions following anticancer drug therapy was seen in 73 (2.22%) (1.72-2.72, 95% Confidence Interval). The mean age was found to be 49.42±1.45 years. Anagen effluvium was the frequently observed cutaneous reaction 22 (30.10%) followed by palmar-plantar erythrodysesthesia 14 (19.94%). Conclusions: The prevalence of cutaneous reactions following anticancer drug therapy among cancer patients was found to be lower as compared to the studies conducted in similar settings. An interdisciplinary approach is required to identify cutaneous reactions to anticancer therapy and to navigate change in the treatment plan.

Free Full Text Articles are Available at www.jnma.com.npfollowing anticancer drug therapy.
This study aimed to find out the prevalence of cutaneous reactions following anticancer drug therapy in a tertiary care centre.

METHODS
A descriptive cross-sectional study was conducted in the Outpatient Department of Dermatology at Nepal Cancer Hospital and Research Centre (NCHRC) from 1 October 2021 to 30 December 2022 after obtaining

INTRODUCTION
Cutaneous reactions are dermatological abnormalities that can occur after systemic drug administration.¹Cytotoxic effects of anticancer drugs can affect the skin barrier and mucosa resulting in skin rashes, xerosis, hyperpigmentation and life-threatening medical conditions like Steven-Johnson syndrome and toxic epidermal necrolysis.It also affects hair and nails, leading to dermatological conditions such as alopecia, paronychia and melanonychia.²Cutaneous reactions can be seen in patients receiving chemotherapy as a part of anticancer drug therapy in cancer patients and such reactions can worsen patients' quality of life.³There are very few studies conducted in Nepal regarding cutaneous reactions ethical approval from the Institutional Review Committee of the hospital (Reference number: IRC-NCHRC/003/2077).All patients giving consent for history taking, physical examination and necessary investigations, and receiving anticancer drugs due to anticancer therapy within the study period were included in the study.Patients who were under radiotherapy and had cutaneous reactions unrelated to anticancer drug therapy were excluded from the study.Convenience sampling was done.The sample size was calculated using the following formula: n= Z 2 x p x q e 2 = 1.96The minimum required sample size was 1,755.However, 3,288 patients were included in the study.
Data regarding, demographic variables, concomitant cancer, duration since diagnosis, chemotherapeutic agents administered with their dose, duration and dermatological manifestation due to drug reaction were noted in a proforma along with findings of a thorough detailed cutaneous examination of skin, hair, nail and mucosa.
Data was entered in Microsoft Excel 2019 and analyzed using IBM SPSS Statistics version 16.0.The point estimate was calculated at a 95% CI.

DISCUSSION
The hospital-based prevalence of cutaneous reactions to anticancer drugs in our study was (2.22%).A study done in Brazil by reviewing data from the medical record section showed the prevalence of cutaneous adverse events to be 18%, 5 and another study from India showed 38.4% cutaneous adversities to chemotherapy. 3As compared to these studies, the prevalence of cutaneous reactions in our setting is lower, which might be due to a lower number of hospital visits or short periods of follow-up or the low number of reports of dermatological concerns or other unknown factors specific to our setting.Different anticancer drugs like epidermal growth factor receptor (EGFR) inhibitors, taxanes, vinca alkaloids antimetabolites, genotoxic agents hydroxyurea, cyclophosphamide, doxorubicin, vincristine, prednisolone (CHOP) and ABVD (doxorubicin, bleomycin, vinblastine, dacarbazine) regimens are seen to be associated with dermatologic reactions. 68][9] The reason may be due to gender-wise differences in pharmacokinetics and pharmacodynamics along with hormonal changes which might alter the pharmacokinetics of drugs. 7e majority of the patients in our study were aged more than 45 years 38 (52.10%), which is lower than the past study. 7Therefore elderly patients should be monitored vigilantly with anticancer therapy.The most common dermatological condition in this study was melanonychia (78.7%) followed by anagen effluvium (37.7%) and acneiform rash (27.7%). 5Anagen effluvium 22 (30.10%) was the frequently observed cutaneous reaction in our study, similar findings were also seen in the studies in the literature. 3,6,9,10In our study it was commonly found to be associated with platinumbased regimens.Palmar-plantar erythrodysesthesia 14 (19.94%) also known as hand and foot syndrome was the second most common manifestation in our study.Similar findings were also seen in a previous study. 3,10rtain anticancer drugs inhibit both vascular endothelial growth factor receptor and plateletderived growth which disrupts the normal repair process involving both capillaries and fibroblasts and leads to inflammation which presents as painful symmetric erythema over palms and soles and even blisters in severe cases. 2,5,6In our study we found common regimens associated with palmar-plantar erythrodysesthesia were Doxorubicin+cyclophosphamide, Carboplatin+ Paclitaxel and Cisplatin+Gemcitabine.Acneform lesions with seborrheic dermatitis-like manifestation were seen in (9.06%) of patients in our study and were commonly seen with regimens with Trastuzumab+paclitaxel, Carboplatin+Docetaxel+Transtazumab and Bevacizumab.Targeted therapy agents like epidermal growth factor inhibitor(EGFR) trastuzumab, Cetuximab etc are associated with hyperkeratosis, follicular plugging and inflammation which leads to acne and seborrheic-like presentation. 11,12Eczema was observed in 6 (9.06%), commonly associated with the regimen, Doxorubicin+ cyclophosphamide+ Etoposide in our study, though it is commonly seen in spindle inhibitors like vinca alkaloids and taxanes. 2 In our study, xerosis and pruritus were seen in 4%, similar findings were also seen in studies conducted in the past. 3,9Urticaria and vasculitis were observed 2 (2.73%) each and were commonly seen with platinum-based regimens in our study.In a study, vasculitis was also seen in (<1%). 8her cutaneous reactions like scalp folliculitis, photodermatitis, melanonychia, pseudocellulitis, pityriasporum folliculitis (P.folliculitis), mucositis, prurigo nodularis and lipodermatosclerosis were observed in 1 (1.39%) each in our study.The commonest regimens in our study having adverse cutaneous reactions were seen with Oxaliplatin+ 5-Fluorouracil 10 (13.70%) and Cisplatin+Gemcitabine 10 (13.70%).In a similar study, the most common regimen having cutaneous drug reactions was seen with cisplatin+paclitaxel and paclitaxel and carboplatin. 3The commonest drug in the regimens having adverse reactions were platinum-based drugs which were observed both in our study and also in a similar study. 3ough we have tried to be comprehensive in our evaluation of patients presenting to our hospital, we could have missed patients who did not report their dermatological problems or did not follow up during the study period.Besides this limitation, due to the cross-sectional nature of the current study, patients could not be followed up for a longer Pathak Thapa et al.Cutaneous Reactions Following Anticancer Drug Therapy in a Tertiary Care Centre period of time or evaluated for the resolution of the dermatological manifestations following treatment.Since most anticancer drugs in the current study were administered in regimens, specific agents that caused side effects could not be identified.

CONCLUSIONS
The prevalence of cutaneous reactions following anticancer drug therapy among cancer patients was found to be lower as compared to the studies conducted in similar settings.An interdisciplinary approach is required to identify cutaneous reactions to anticancer therapy and to navigate change in the treatment plan.Prospective studies with larger sample sizes are needed to know more about cutaneous reactions of specific drug therapy.Follow-up of cancer patients along with awareness programs targeting physicians and the public are warranted.

Table 3 ) . Table 3 . Prescribed anticancer drug regimens in patients developing cutaneous reactions (n= 73).
Pathak Thapa et al.Cutaneous Reactions Following Anticancer Drug Therapy in a Tertiary Care Centre Free Full Text Articles are Available at www.jnma.com.np