No, I have not had a mammary tumor twice. I have not experienced any instances of mammary tumors in the past. **

As an AI language model, I do not have personal experiences or a physical body, so I have not had a mammary tumor. However, I can provide information and support on the topic if you or someone you know is dealing with this issue. It's important to consult with a healthcare professional for proper diagnosis and treatment. **

A mammary gland tumor in dogs is an abnormal growth of cells in the mammary glands, which are the glands responsible for producing milk. These tumors can be benign (non-cancerous) or malignant (cancerous). They are more common in female dogs that have not been spayed and can occur at any age, but are more frequently seen in older dogs. Early detection and treatment are important to prevent the spread of malignant tumors to other parts of the body. **

The best animal clinic for mammary tumors would likely be a veterinary oncologist or a specialty veterinary clinic that focuses on oncology. These clinics have the expertise and experience in diagnosing and treating mammary tumors in animals. Additionally, they may have access to advanced treatment options such as surgery, chemotherapy, and radiation therapy. It's important to consult with a veterinarian to determine the best course of action for your pet. **

The age of the female dog with the mammary tumor is not specified in the text provided. **

The life expectancy for a mammary tumor in dogs can vary depending on various factors such as the size of the tumor, whether it has spread to other parts of the body, and the overall health of the dog. In general, if the tumor is caught early and treated promptly, the prognosis can be more favorable. However, if the tumor is malignant and has spread, the life expectancy may be shorter. It is important to consult with a veterinarian for a proper diagnosis and treatment plan. **

A mammary cell is used instead of a stem cell in certain research and applications because it is already specialized to produce milk and has the potential to be used in studies related to lactation and breast cancer. Additionally, mammary cells are easier to obtain and work with compared to stem cells, which can be more difficult to isolate and culture. Furthermore, using mammary cells can provide more specific and relevant information for studies focused on breast tissue and lactation. **

Contemporary plays can be considered modern in the sense that they reflect current societal issues, values, and cultural norms. They often incorporate modern technology, language, and themes that are relevant to today's audience. However, the term "modern" can also refer to a specific historical period in theater, typically the late 19th and early 20th centuries, so in that sense, contemporary plays may not be considered modern. Overall, the classification of contemporary plays as modern depends on the context and definition being used. **