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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
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.
How to detect colorectal cancer early
In clinical practice, to detect colorectal cancer early, screening should be prioritized for individuals with a family history of colorectal cancer. This generally involves tests for tumor markers and colonoscopy examinations. The tumor markers include carcinoembryonic antigen, carbohydrate antigen 724, carbohydrate antigen 199, and carbohydrate antigen 125, among others. Colonoscopy examinations should be conducted annually. Furthermore, for individuals with colorectal polyps, yearly colonoscopy is especially recommended to detect early stages of colon cancer. Similarly, for individuals suffering from chronic inflammatory diseases of the colon and rectum such as ulcerative colitis or Crohn's disease, colonoscopy examinations should also be performed to facilitate early detection of colorectal cancer.
Can someone with thyroid cancer occasionally eat barbecue?
Patients with thyroid cancer can occasionally eat barbecue, but should limit their intake of such foods. This is because thyroid cancer is a common malignant tumor in the head and neck area, and its exact cause is still unclear. The mechanism of its development is also not clearly understood. However, the high incidence of thyroid cancer is related to certain factors such as radiation, viral infections, or genetic factors, and both iodine deficiency and excess can lead to a high incidence of thyroid cancer. Barbecued foods are not beneficial for the recovery from thyroid cancer, therefore it is clinically advised to reduce intake. However, eating it occasionally does not have a significant impact on the overall health of patients, so it can be consumed in moderation. Additionally, for patients with thyroid cancer, the diet should mainly be easy to digest, non-irritating, and should enhance bodily immune strength.
What are the signs of pancreatic cancer?
Pancreatic cancer is a type of malignant tumor of the digestive tract that is difficult to detect in its early stages. The signs of pancreatic cancer mainly include the following: First, among people with diabetes, if there is a sudden occurrence of uncontrollable blood sugar levels, unexplained general fatigue, abdominal pain, decreased appetite, or even jaundice, one should highly suspect the possibility of pancreatic cancer. Second, individuals with a family history of cancer who recently experience unexplained symptoms related to the digestive tract should also be alert to the possibility of pancreatic cancer. Third, some patients may experience unexplained rapid weight loss accompanied by significant jaundice, which should also be considered as potentially indicating pancreatic cancer.