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Yan Chun
Oncology
About me
Graduated from the Clinical Medicine Department of Qingdao Medical College, has been working in the Oncology Department since 2001, obtained the qualification of attending physician in the same year. Promoted to attending physician in 2003. Qualified as associate chief physician in 2011. Participated in advanced studies at Jinan Cancer Hospital from June to November 2015. Serves as a youth member of the Chemical Therapy Committee in Shandong Province, youth member of the Elderly Therapy Committee of the Qingdao Anti-cancer Association, and a member of the Biologic Therapy Committee of the Qingdao Anti-cancer Association.
Proficient in diseases
Chemotherapy, radiotherapy, deep hyperthermia, targeted therapy, and endocrine therapy for various tumors such as stomach cancer, colorectal cancer, lung cancer, breast cancer, ovarian cancer, and pancreatic cancer.
Voices
Can early-stage liver cancer be cured by resection?
Liver cancer is one of the common malignant tumors of the digestive system. For patients with early-stage liver cancer, clinical cure is possible after curative surgery. This clinical cure refers to instances where liver cancer patients, after undergoing curative surgery, do not show signs of recurrence or metastasis over a period exceeding five years. This means there is no invasion of surrounding tissues and no metastasis to distant organs – effectively, the patients have achieved clinical cure. Patients' survival time exceeds five years, or even longer. Therefore, for patients with early-stage liver cancer, because their lesions are relatively limited, achieving clinical cure is possible following curative surgery. However, as the disease progresses to the mid and late stages, even with aggressive surgery and postoperative adjuvant radiotherapy or chemotherapy, most patients cannot achieve clinical cure.
Is prostate cancer stage T2 considered early or mid-stage?
Prostate cancer stage T2 is considered early or intermediate, but it is also necessary to understand the patient's N and M status. If the patient is at stage T2, and both N and M are at stage 0, then it is considered early-stage prostate cancer. If the primary lesion is at stage T2, but N1 is present and there is no metastasis (M), then the patient is considered to have intermediate-stage prostate cancer. If the primary lesion is at stage T2, but there is metastasis in N and M, then the patient's clinical stage is considered advanced. The clinical staging of prostate cancer not only requires understanding of the primary lesion T, but also involves the regional lymph nodes N and distant metastasis M.
What causes pancreatic cancer?
Pancreatic cancer is a malignant tumor of the digestive system whose incidence has gradually increased in recent years. The exact cause of pancreatic cancer is still unclear, but there are several factors that can increase the incidence of pancreatic cancer: 1. Age factor: Statistical data shows that the incidence of pancreatic cancer increases with age. 2. Dietary factors: Clinical research data confirms that some poor eating habits, such as consuming too much high-fat and animal protein, can significantly increase the incidence of pancreatic cancer. 3. Unhealthy lifestyle habits: People who smoke heavily and drink alcohol over a long period have a significantly higher incidence of pancreatic cancer compared to the general population. 4. Other benign pancreatic diseases, such as diabetes: Statistical data indicates that among diabetic patients, especially those with Type 2 diabetes, there is a slight increase in the incidence of pancreatic cancer.
Early symptoms of thyroid cancer
In the early stages, most thyroid cancer patients do not exhibit obvious symptoms. A minority of patients may inadvertently find that thyroid nodules grow rapidly and these nodules have slightly limited mobility and mild pain upon palpation. Some patients with medullary thyroid cancer may experience symptoms like facial flushing early on due to abnormal hormone secretion in the body. Additionally, clinical symptoms are not commonly seen in the early stages of thyroid cancer. Only as the disease progresses can symptoms such as neck lumps from regional lymph node metastasis, as well as distant spread, cause clinical symptoms like neck swelling, chest tightness, and difficulty breathing.
What causes colon cancer?
Colorectal cancer is a malignant tumor of the digestive system, and its occurrence is related to the following factors: First, dietary factors. A high-fat content and a low fiber content in the diet both lead to an increased incidence of colorectal cancer. Furthermore, long-term consumption of pickled foods can also increase the incidence of colorectal cancer, presumably because these foods contain higher levels of nitrosamine carcinogens. Second, some benign chronic diseases of the colon, such as adenomatous polyps and certain chronic colitis, can also lead to an increased incidence of colorectal cancer. Third, environmental factors. Epidemiological studies have found that the occurrence of colorectal cancer is related to geographical distribution. In some environments with a high incidence of colorectal cancer, the content of some trace elements in the soil is too low, leading to a high incidence of colorectal cancer.
How to determine if a red spot is a hemangioma
In clinical settings, to determine whether red spots on the skin are hemangiomas, it is advised to visit a hospital and seek the expertise of an oncologist or a dermatologist specializing in vascular surgery for proper diagnosis. For small red spots on the skin, one can apply local pressure to see if the redness fades, returning to a normal skin color, which could indicate that the spots are hemangiomas. Hemangiomas are relatively common benign vascular tumors. In most cases, they do not cause symptoms clinically and are due to endothelial cell abnormalities in the vessels. Symptoms such as pain might occur only when the hemangioma is large enough to cause compression.
What are the early symptoms of lymphoma?
Lymphoma is a malignant tumor of the hematological system, with early symptoms including painless enlargement of the lymph nodes in the neck, which are generally well-movable and firm or hard in texture early on, without inflammatory changes such as redness, swelling, heat, or pain. Additionally, lymphomas occurring in the gastrointestinal tract can clinically present with symptoms such as upper abdominal fullness and discomfort, bloating, nausea, recurrent acid reflux, and belching. Lymphomas occurring in the respiratory system can manifest clinically with symptoms such as cough, shortness of breath after activity, and chest pain. Lymphomas occurring in the brain can cause dizziness, headaches, movement disorders, ataxia, and abnormal gait.
Does early-stage liver cancer cause itchy skin?
Liver cancer is one of the common malignant tumors in the digestive system. In the early stages of liver cancer, most patients do not exhibit symptoms of skin itching. It is only when the cancer progresses and causes obstructive jaundice that patients clinically develop symptoms of skin itching. Early-stage liver cancer patients typically do not show typical clinical symptoms, or they may not have any significant symptoms at all. This is because early-stage liver cancer lesions are small and localized, without external invasion or metastasis. Therefore, the impact on the entire body is minimal, and clinically it generally manifests as mild abdominal bloating, discomfort, nausea, diarrhea, and some patients may experience a dull ache or discomfort in the liver area. Because the symptoms of early-stage liver cancer are atypical, many patients are already in the middle to late stages by the time they seek medical attention, missing the opportunity for clinical cure.
What are some symptoms of early pancreatic cancer?
Patients with early-stage pancreatic cancer generally do not exhibit many symptoms, as the tumors are relatively small. Clinically, many patients may experience intermittent mild abdominal pain that does not affect their daily lives. A small number of early-stage patients may exhibit symptoms of general fatigue, mild loss of appetite, nausea, mild acid reflux, or other symptoms of indigestion. Additionally, a few patients in the early stages may experience intermittent episodes of diarrhea. Because these symptoms are not distinctive, patients rarely seek medical attention early. When symptoms like significant epigastric pain and jaundice become apparent, it often indicates that the pancreatic cancer has progressed to a more advanced stage.
What are the symptoms of subungual melanoma?
Subungual melanoma, clinically, displays different symptoms depending on the stage. In its early stages, subungual melanoma primarily manifests as changes in nail color, with some cases showing localized thickening of the nail. As the melanoma progresses, abnormal secretions such as bloody or serous fluids may appear under the nail, and the nail itself may become uneven. As the subungual melanoma invades surrounding tissues, symptoms such as swelling, pain, or bleeding in the localized fingernail may occur. In advanced stages, symptoms of metastatic sites, such as coughing, chest pain, and chest tightness from lung metastases, can also manifest.