What is juvenile melanoma?

summary

Although the incidence of malignant melanoma is relatively low in China, because some doctors and patients do not know enough about its severity, it is usually too late to see a doctor, and the treatment effect is extremely unsatisfactory. Benign melanoma has a good prognosis after resection, but once it is confirmed to be malignant, it can not be cured even after resection, because 30% to 70% of the cases will metastasize. It has been reported that small malignant melanoma can survive for 12 months after resection, but the mortality within 2 years is 54%. If a large area of malignant melanoma is removed, it can survive for 4 months, but the mortality within 2 years is 100%. In addition to surgical resection, radiotherapy, local hyperthermia and chemotherapy can also be used. Radiotherapy has been successfully used in the control of melanoma and may be the most effective treatment only after surgical resection.

What is juvenile melanoma?

The so-called juvenile melanoma is also known as nevus. In fact, the nevus we see is a very rare kind of melanoma. Most of this kind of tumor is benign, and a few are malignant. Benign melanoma can be removed by laser point nevus, while malignant melanoma needs physical therapy, Specific melanin cell tumour is in what kind of degree, still want to pass formal examination ability to diagnose.

Nevus, also known as benign juvenile melanoma, is a rare melanoma. The pathological changes are malignant, while the biological process is benign. It is rare in clinic, mostly in children, occasionally in adults. Although malignant melanoma is a highly malignant tumor with rapid development and easy extensive metastasis. However, its biological behavior also has great variability, the lesions can be static for many years, or only slowly increase; It can also increase rapidly and transfer in the short term.

Juvenile melanoma presents as a slow-growing round nodule on the face of a child. Microscopically, the cells were pleomorphic. There is mitosis. The tumor cells did not infiltrate into the epidermis. There was no ulcer on the surface of the tumor. Cellular blue nevus often occurs in the buttock. Caudal sacral. waist. Light blue nodules. The surface is smooth and irregular. The dark black cells of dendrites were observed under microscope. Large prismatic cells. And they gather into cell islands. When there is mitotic phase or necrotic area. The possibility of malignant transformation should be considered.

matters needing attention

Senile nevus is a verrucous nevus on the surface of the elderly. The epidermis is hyperkeratosis. Partial thickening or atrophy of granular layer. The spinous layer is hypertrophic. The basic level is complete. There may also be pigment increase. Dermal papilla proliferated. The appearance was papilloma like hyperplasia. The lesions of seborrheic keratosis also showed papillomatous hyperplasia. The boundary under the epidermis is clear. Incomplete keratosis. The granular layer thickens first. It becomes thin or even disappears. There may be a little or more melanin in proliferative epidermal cells.