A mole suddenly grew on my stomach

Many people have moles, and they grow in different parts of the body, some are big and some are small. It is a very common and normal thing. Some people may feel worried when a mole suddenly grows on their stomach, wondering if it is a skin disease. Moles can be black or red. Most of them are black, which is actually a form of melanoma. Some may develop lesions, so if the mole is too large, you should consider removing it.

Melanoma refers to a pigmented nevus with malignant changes, which develops from a junctional nevus or a mixed nevus. Although nevus may not necessarily turn into malignancy, chronic irritation and inappropriate treatment have a great relationship with the transformation of nevus into melanoma. The heel is the most common site of disease, followed by the head, neck, and limbs. Most cases metastasize to regional lymph nodes, and may also metastasize through the blood. Diagnosis is based on pigmentary changes and clinical symptoms and whole-mount biopsy. The best treatment is surgical resection [1].

Causes and symptoms

Melanoma is a malignant tumor that originates from cells that produce melanin. The symptoms include the sudden appearance or rapid growth of a mole, the deepening of color, the appearance of comet-shaped tumors or pigment rings around it, local pain, infection, ulcers or bleeding, and the appearance of swollen lymph nodes. The tumor is more common in the lower limbs, followed by the head, neck, upper limbs, eyes, under the nails and labia. In the early stages, it can metastasize to the liver, brain, bones, mucosa, etc. through the lymphatics and blood. The onset of the disease is closely related to moles. Moles on the palms, soles of the feet, and eyes that are frequently rubbed, as well as moles located at the junction of the epidermis and dermis, are prone to malignant transformation and are considered to be the precursors of melanoma.

Melanoma is also called malignant melanoma. It is a skin tumor related to orthopedics. Benign melanoma, also known as pigmented nevus, often does not attract attention. Melanoma can be malignant from the outset, but usually develops from a junctional nevus. This is a more common and more malignant tumor. It is more common in adults over 30 years old, with a male to female ratio of 2:1. The most common sites are the lower limbs, especially the feet, followed by the upper limbs, head and neck, and trunk. The cause of the disease is still unknown, but some cases have a history of skin injury, burns and X-ray exposure may be the cause. A small number of cases are related to endocrine factors, and familial tendencies have also been reported. The tumor is gray-black, nodular, soft, and sometimes ulcerated. Microscopically, the tumor cells are mostly spindle-shaped, round or polygonal, with varying amounts of melanin granules in the cytoplasm. They appear black in appearance. The tumor cells vary in size and are arranged in diffuse, nested, glandular or trabecular shapes. This tumor should be treated promptly regardless of whether it has metastasized or not [2].