https://www.selleckchem.com/products/OSI-906.html The efficacy of treatment after fixed intervals of treatment was analysed. Most clinical parameters were not related to therapeutic efficacy, including disease duration, age at onset and number of nail signs. However, after six months of treatment, the presence of transverse grooves was shown to be associated with better efficacy. Based on comparison of NAPSI and N-NAIL scores relative to the first visit, the presence of transverse grooves, longitudinal ridges or discolouration were associated with better efficacy. Clinicians should be aware of the clinical parameters related to severity and the use of therapeutic efficacy in choosing individualized treatment and predicting prognosis. Clinicians should be aware of the clinical parameters related to severity and the use of therapeutic efficacy in choosing individualized treatment and predicting prognosis. Primary cutaneous aggressive epidermotropic CD8+ cytotoxic T-cell lymphoma (AECTCL) is a rare and aggressive lymphoma characterised by ulcerated lesions and a poor prognosis. To present a case series of four previously misdiagnosed AECTCL patients and discuss the importance of early diagnosis. All patients in this study were identified from the database of the Dermatology Department of the Medical School of Bezmialem Vakif University, based on clinical and histopathological diagnosis of AECTCL between 2010 and 2018. AECTCL cases may mimic many benign dermatoses and accurate diagnosis may be delayed. Because of its poor prognosis, early diagnosis of AECTCL may be helpful in improving the likelihood of patient survival, but further study is needed to address the challenges in diagnosing this rare and aggressive lymphoma. Because of its poor prognosis, early diagnosis of AECTCL may be helpful in improving the likelihood of patient survival, but further study is needed to address the challenges in diagnosing this rare and aggressive lymphoma. In previous studies, patient