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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
Does CEA increase in throat cancer?
In the blood tests of some laryngeal cancer patients, an increase in the CEA index may be observed, but most laryngeal cancer patients do not exhibit abnormal CEA levels. This is because laryngeal cancer is a common malignant tumor in the head and neck region, and currently, there are no specific tumor markers clinically for laryngeal cancer. CEA, also known as carcinoembryonic antigen, is a tumor marker that is most often elevated in the bodies of patients with malignant tumors. Clinically, an increase in the CEA level is commonly seen in malignant tumors of the gastrointestinal tract, thoracic malignancies, malignancies in the female urogenital system, and some tumors in the male urogenital system. However, in patients with head and neck malignancies, this marker is not commonly elevated.
What are the early symptoms of kidney cancer?
Kidney cancer is a common malignant tumor in the urinary system. Many patients with early-stage kidney cancer do not show any symptoms clinically and are incidentally discovered during medical examinations. Many patients in the early stages may also present with painless hematuria, sometimes as gross hematuria and sometimes as microscopic hematuria. Some patients may experience pain in the kidney area due to blood clots formed after hematuria, mainly presenting as intermittent episodes of mild back pain. Additionally, some patients in the early stages might show symptoms of paraneoplastic syndrome, such as hypertension and fever, but these clinical symptoms generally occur at a very low frequency. When patients present with obvious clinical symptoms, it often indicates that the kidney cancer has metastasized, leading to a clinical presentation of mid-to-late stage kidney cancer.
What should be noted about having intercourse after ovarian cancer surgery?
Patients with ovarian cancer can have sexual intercourse after radical surgery or palliative surgery, but there are several precautions to consider: Firstly, it is not advisable to have sexual intercourse too soon after surgery, as early intercourse may lead to poor healing of the surgical site, or cause infections, which are detrimental to the patient's recovery. It is generally recommended to schedule sexual intercourse one or two months after ovarian cancer surgery, and some patients are advised to wait three months. After three months, most patients' physical conditions improve and the incisions heal. In such cases, the likelihood of infection from intercourse is low. Moreover, the frequency of sexual intercourse should not be too frequent or excessive, as it may impact the patient's physical strength or lead to concurrent infections. Furthermore, patients should practice contraception during intercourse after surgery, as pregnancy is not advisable for patients who have undergone radical or palliative surgery for ovarian cancer, since pregnancy can exacerbate the development of the disease.
Is intermittent pain in the upper right abdomen for two months colon cancer?
Persistent dull pain in the upper right abdomen lasting two months is very likely a clinical symptom caused by colon cancer. This is often due to the lesion of colon cancer invading the intestinal mucosa, causing mucosal spasms and resulting in pain. Alternatively, the tumor may cause obstruction of the intestinal lumen, leading to intestinal obstruction, which also presents as pain clinically. This type of pain is generally characterized by persistent dull pain, especially more pronounced at night, and ordinary anti-inflammatory and analgesic drugs are less effective in relieving it. The pain will only subside after the lesions of colon cancer are effectively controlled. However, for dull pain in the upper right abdomen, some benign diseases, such as certain ulcerative colitis or chronic intestinal tuberculosis, should also be considered, as they can present with similar symptoms. To definitively diagnose whether the dull pain is caused by colon cancer or a benign colon condition, it is generally necessary to complete related imaging or hematological examinations. Sometimes, histopathological examinations are necessary to differentiate the diagnosis.
What are the early symptoms of rectal cancer in women?
The early symptoms of female rectal cancer are primarily localized to the rectum. Most patients exhibit symptoms such as bloody stools, recurrent constipation, or alternating occurrences of diarrhea and constipation. Some patients may experience a change in stool characteristics, an increase in the frequency of daily bowel movements, and narrower stools. Additionally, some early-stage patients may exhibit symptoms similar to bacterial dysentery, such as the discharge of mucus and bloody pus in stools, and a feeling of incomplete evacuation after a bowel movement. Some female rectal cancer patients may mistake bloody stools for hemorrhoids and consequently avoid seeking medical attention. Early symptoms are not distinctive, and many patients may overlook them, leading to a delay in the early detection of rectal cancer.
Why do benign teratomas recur?
Benign teratomas, although not aggressive or metastatic, do not require adjuvant chemotherapy or radiation therapy after curative surgery to fight the tumor. However, many benign teratomas recur after surgery and require further surgical treatment. The cause of benign teratoma recurrence is considered to be due to the persistent presence of oncogenic factors. Therefore, benign tumors can also recur, since the exact cause and pathogenesis of benign teratomas are still unclear clinically. Thus, prevention from an etiological perspective is not possible, and the only option is timely surgical removal upon tumor detection to prevent the benign teratoma from becoming malignant. For patients with benign teratomas, regular follow-up is necessary after curative surgery to monitor any changes in the condition. If signs of recurrence are detected, prompt intervention is necessary to prevent malignancy.
What are the symptoms of endometrial cancer?
Patients with endometrial cancer mainly experience symptoms in three areas: First, obvious symptoms caused by local tumors in the uterus, such as irregular vaginal bleeding, changes in the menstrual cycle, a sense of fullness and dull pain in the lower abdomen and pelvic area, along with significant discomfort and pain. Second, clinical symptoms caused by metastatic lesions. Endometrial cancer can spread through three pathways, which after dissemination can cause a variety of symptoms, such as abdominal pain, bloating, constipation, headache, vomiting, movement disorders, chest tightness, coughing, wheezing, and difficulty breathing. Some patients may also experience bone pain. Third, systemic symptoms, which are typically seen in advanced stages of endometrial cancer and commonly include cachexia, fever, and others.
Why can't people with liver cancer drink milk?
Liver cancer patients are generally advised not to drink milk, particularly in cases of advanced liver cancer where there is a potential for hepatic encephalopathy. This is because, for patients in the late stages of liver cancer, liver function is compromised, and some may already exhibit symptoms indicative of pre-hepatic encephalopathy. Consuming a diet rich in protein can easily trigger hepatic encephalopathy, and since milk is high in protein, its consumption is usually limited or avoided in such patients. However, for the majority of liver cancer patients, drinking milk is permissible as it not only contains abundant protein but also rich calcium, which is beneficial for the recovery of liver cancer patients. Most liver cancer patients have hypoalbuminemia (low levels of protein in the blood) and some also have hypocalcemia (low levels of calcium in the blood), thus the intake of calcium and protein-rich foods can be very beneficial for their recovery.
How long does it take for melanoma to develop?
The duration of melanoma development varies because melanoma is a type of skin cancer with a relatively high degree of malignancy. However, clinically, the types of melanoma are diverse, and the onset time generally correlates with the patient's clinical phenotype. For some superficial types of melanoma with low malignancy, it generally takes several years to develop. For highly malignant melanomas, the disease generally progresses rapidly within about six months to a year. Once melanoma progresses, it can affect multiple parts of the body and severely impact the patient's lifespan.
Can occasional smoking and drinking be okay with thyroid cancer?
Thyroid cancer is a common malignant tumor in the head and neck area, and currently, the exact mechanism and etiological causes of thyroid cancer are not clearly defined in the clinic. However, some research studies indicate that there are certain factors associated with the incidence of thyroid cancer. For example, ionizing radiation, prolonged exposure can lead to the occurrence of thyroid cancer. Both insufficient and excessive iodine intake can lead to a high incidence of thyroid cancer. Genetic factors also play a significant role in the development of thyroid cancer. Excessive smoking and drinking can promote the occurrence of thyroid cancer. Therefore, heavy smoking and drinking are not recommended, but occasional smoking and drinking do not significantly impact the condition of thyroid cancer and are deemed acceptable. Moreover, for patients with thyroid cancer, treatment is primarily surgical, as radiotherapy and chemotherapy are not very sensitive anti-tumor treatments.