Background As a result of technological developments in healthcare services, telemedicine is becoming widespread. We aimed to determine the effect of COVID-19 on Turkish medical oncologists’ opinions of telemedicine through a survey. Methods This study was conducted using an online questionnaire linked to an invitation e-mail sent to the members of the Turkish Medical Oncology Association mailing group between May and July 2020. Results Of the 110 (73 males and 37 females) medical oncologists who answered the questionnaire, the average age was 43.9 ± 7.29 (range: 31–64) years, and the majority of the respondents were academics. The most commonly used telemedicine method was store and forward (69.7%). Telemedicine use during clinical visits and multidisciplinary councils increased significantly during the COVID-19 pandemic ( p < 0.001 in both cases). Conclusion The use of telemedicine increased during the COVID-19 pandemic, and the pandemic has led oncologists to view telemedicine more positively.

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Multiple myeloma is a malignant disease that results in the proliferation of a single plasma cell clone. The clinical manifestations are anemia, bone pain, bone fractures, hypercalcemia, hypergammaglobulinemia, increased erythrocyte sedimentation rate, rouleaux formation on the peripheral blood smear and rarely increased serum viscosity. Rarely cast nephropathy associated with acute renal failure may be the first finding of multiple myeloma. We report a clinical case of a 44-year-old female patient who presented with acute renal failure due to cast nephropathy without myeloma’s typical clinical and laboratory findings. In the clinical case presented here, we highlight that multiple myeloma can be presented with acute renal failure and without any other typical symptoms.

Malignant melanoma is not only a type of skin cancer but also characterized with a wide spectrum of clinical signs and symptoms. In this article we report a 32-year-old male case who was admitted to internal medicine clinic for his large axillary mass and massive ascites that was initially thought to be due to hematologic malignancy. During our clinical follow-up an ulcerated skin lesion was noticed. Both the pathological evaluations of axillary mass and skin lesion revealed metastatic malignant melanoma.

Objectives: This study aims to examine the prevalence of accompanying insulin resistance in patients who are diagnosed with pheochromocytoma. Patients and methods: A total of 44 non-diabetic patients (10 males, 34 females; mean age 54.2±12.1 years; range 42 to 66 years), who were diagnosed with pheochromocytoma at the Endocrinology Clinic of Tepecik Education and Research Hospital between January 2014 and January 2016, were retrospectively analyzed. The Homeostasis Model Assessment (HOMA-IR) formula [HOMA-IR = fasting insulin (μU/L) x glukoz (mmol/L)/22.5] was used to predict the insulin resistance. Results: The mean HOMA-IR value was found to be 3.2±1.2. Insulin resistance was detected in 29 of the patients (65.9%). Conclusion: In addition to causing secondary hypertension, pheochromocytoma often leads to impaired glucose tolerance, but is usually overlooked in treatment. Based on the data obtained from our study, we think that insulin resistance should be investigated in every pheochromocytoma patient.