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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
Melanoma CT manifestations
The CT manifestations of melanoma vary depending on the location of the tumor. Generally, melanomas that occur on the skin can appear on CT scans as mass-like lesions, and the scans can show whether there are any urgent conditions involving the surrounding nerves, blood vessels, and tissues. Some patients may only show CT imaging changes such as localized thickening of the skin. In melanomas that occur inside the skull or in the vulva, the CT mainly shows localized mass-like lesions. These lesions are typically low-density foci with poor blood supply around them, and they generally have an irregular shape.
What should women with hepatic hemangiomas be cautious about?
Patients with hepatic hemangiomas in women need to pay attention to the following aspects clinically. First, be cautious with physical activity and reduce the intake of too many medications to prevent damage to liver function in patients with hepatic hemangiomas. Second, for smaller hepatic hemangiomas in women, regular imaging examinations such as ultrasound and MRI can be conducted to monitor changes in the hemangiomas. Third, for larger hepatic hemangiomas, it is necessary to regularly monitor liver function changes and provide timely treatment. Fourth, the usual diet should be low in fat and high in fiber to prevent the worsening of hepatic hemangioma disease due to hyperlipidemia.
Does early-stage lung cancer cause facial swelling?
Patients with early-stage lung cancer generally do not experience facial swelling. This is because early-stage lung cancers mainly include carcinoma in situ and stage I lung cancer. At this stage, the cancer tissue is confined to the mucosa, without invasion of the surrounding tissues or distant metastasis. Therefore, the clinical symptoms of patients with early-stage lung cancer primarily involve the respiratory system. Clinical symptoms mainly include coughing, often a dry cough without phlegm, or coughing up phlegm with blood, hemoptysis, and massive hemoptysis. Some patients may experience chest pain, or have a barking cough, or a metallic-sounding cough. Some patients may have shortness of breath after physical activity, and severe cases can experience breathing difficulties. In most cases, patients do not exhibit other clinical changes. However, as the disease progresses, and there is invasion into surrounding tissues, or distant metastases occur, symptoms of invasion into surrounding tissues or distant metastatic sites may appear. For example, metastasis to the cervical lymph nodes can cause enlarged lymph nodes, or compression of the superior vena cava by the patient, resulting in swelling of the face and neck.
Is vomiting in prostate cancer due to metastasis to the liver?
Patients with prostate cancer may experience vomiting due to the metastasis of the disease to the liver, causing damage to liver function. However, vomiting could also be caused by other reasons, such as the metastasis of prostate cancer to the peritoneum of the abdominal cavity. Clinically, this can lead to cancerous intestinal obstruction, with symptoms commonly including vomiting, abdominal pain, bloating, reduced bowel movements and gas, or cessation of bowel movements and gas. When prostate cancer metastasizes to the brain, the increased intracranial pressure can also cause symptoms such as vomiting, headache, swelling of the optic disc, hemiplegia, and aphasia. Additionally, some prostate cancer patients may experience vomiting due to toxic side effects from treatments such as chemotherapy and targeted therapy.
Early symptoms of rectal cancer
The early symptoms of rectal cancer generally include the following aspects: many patients experience changes in their bowel habits, such as prolonged diarrhea, prolonged constipation, or alternating occurrences of diarrhea and constipation. Some patients also experience changes in the characteristics of their stools, with stools becoming thinner and more watery due to increased bowel movements. Additionally, some patients may excrete stools mixed with mucus, pus, and blood, or stools that contain blood, and may experience a feeling of urgency followed by a sensation of incomplete evacuation. Some patients also feel itching or a dull pain in the anal area. Moreover, the early symptoms of rectal cancer are not very prominent, and many patients can easily confuse them with benign rectal diseases such as hemorrhoids and anal fissures. This confusion leads many patients not to seek medical attention, and by the time symptoms like significant pain and lumps appear, the disease is typically in its intermediate or advanced stages.
What are the early symptoms of colon cancer?
The early symptoms of colon cancer mainly include discomfort and pain in the lower abdomen, which does not necessarily become more pronounced after eating and generally occurs intermittently. Some patients may also experience changes in stool shape, primarily manifested as narrower stools, or an increased frequency of bowel movements per day, leading to diarrhea. Some patients in the early stages may experience worsening of pre-existing constipation, or alternating symptoms of diarrhea and constipation. Some colon cancer patients in the early stages may experience bloody stools, or the presence of mucus, pus, and blood in the stool, which are some atypical gastrointestinal symptoms of colitis. Some patients may also experience nausea.
Is a fever in nasopharyngeal carcinoma a sign of deterioration?
Patients with nasopharyngeal carcinoma may exhibit fever in a clinical setting. This fever can partially be due to the worsening of the carcinoma itself. However, not all cases are due to progression of the disease; some are caused by infections and other factors. For example, after receiving anti-tumor treatments such as radiotherapy and chemotherapy, patients with nasopharyngeal carcinoma may experience a decrease in white blood cells, making them highly susceptible to infections, which can then manifest as fever. Additionally, patients with nasopharyngeal carcinoma may have weakened immune systems, making them prone to infections and fevers. As the nasopharyngeal carcinoma progresses, it can release abnormal hormones, forming endogenous fever-inducing agents, leading to clinical manifestations of fever. Generally, this type of fever is referred to as tumor fever, which is often related to the progression of the disease. Tumor fever typically requires anti-tumor treatment for effective relief.
Symptoms of male breast cancer
The clinical symptoms of male breast cancer are generally similar to those of females, mainly presenting as painless, progressive enlargement of breast lumps. These breast lumps usually occur under the areola, and some patients may experience nipple inversion or abnormal nipple discharge. Many breast lumps tend to have unclear boundaries with surrounding tissues and often adhere to the skin or chest muscles. Many patients with male breast cancer experience metastasis to the axillary lymph nodes, causing the metastatic lymph nodes to enlarge and become painful, local lymphatic drainage obstruction, and causing local upper limb swelling and pain. Moreover, some male breast cancer cases have metastasized to the lungs, presenting clinically with symptoms such as coughing and chest pain related to the respiratory system. Some patients with male breast cancer have liver metastasis, clinically presenting with pain in the liver area, decreased appetite, and abnormal coagulation functions.
Will people with early-stage liver cancer experience weight loss?
Patients with early-stage liver cancer generally do not experience weight loss; weight loss is more commonly a clinical manifestation in patients with late-stage liver cancer. The reason for weight loss in liver cancer patients is due to the damage caused by cancerous tissue to liver function, leading to reduced synthesis of albumin. Furthermore, patients with liver cancer often experience a significant decrease in food intake, resulting in insufficient intake of nutrients such as albumin. Additionally, the progression of liver cancer tumors requires the consumption of a large amount of the body's albumin. Therefore, due to these factors, many patients with late-stage liver cancer exhibit clinical manifestations of weight loss. Moreover, besides not experiencing weight loss, patients with early-stage liver cancer also do not typically present with typical clinical symptoms. Many patients are asymptomatic, and as the lesion progresses, the cancer spreads, possibly leading to clinical manifestations associated with tumor spread. For example, pain in the liver area, a significant decrease in food intake, fatigue, fever, pain, and some patients may also exhibit symptoms of metastasis such as headaches, vomiting, abdominal pain, and abdominal distension.
Symptoms and Early Signs of Throat Cancer
Symptoms and signs of laryngeal cancer in patients mainly vary according to the different locations of the tumor in the larynx. Most patients with early-stage laryngeal cancer experience a foreign body sensation in the throat, which can be persistent. Patients may even feel a choking sensation when swallowing. Additionally, some patients with early-stage laryngeal cancer may experience unexplained hoarseness or coughing and choking when drinking water, and these symptoms generally do not respond well to oral medication. Some patients exhibit frequent coughing, and ordinary symptomatic cough treatments are ineffective. These are mostly early symptoms and signs. As the laryngeal cancer progresses, patients will experience a noticeable obstruction in the throat, along with symptoms like difficulty breathing.