Accessory Breast Tissue Clinically Mimicking Soft Fibroma / 대한피부과학회지

Accessory breast tissue is a developmental anomaly defined as persistence of breast tissue along the embryonic mammary line in the mid-thoracic region. Rarely, an abnormally located remnant of the line persists and develops into completely formed mammary glands. A 61-year-old woman presented with a pedunculated mass on the mid-lower abdomen, below the umbilicus. She detected a pea-sized nodule a few decades ago and it gradually enlarged since 1 year ago. There was no pigmented prominence resembling a nipple. Histological finding revealed lobules of the breast forming islands of glandular tissue. We believe this is an unusual case of accessory breast tissue mimicking soft fibroma as a pedunculated mass.

Ultraviolet B-Induced Apoptosis of Normal Human Melanocytes and G361 Cells

BACKGROUND: Ultraviolet(UV) light is one of the injurious environmental agents which is known to lead to apoptosis of cells. However, studies on UVB-induced apoptosis of melanocytes are still lacking and there are some discrepancies between researchers. OBJECTIVE: Our purpose was to evaluate the characteristics of UVB-induced apoptosis of melanocytes and G361 cells. METHODS: Cultured normal human melanocytes and malignant melanoma cell lines (G361 cells) were analyzed by several detection methods including morphological examination of propidium iodide(PI) stained cells under fluorescence microscopy, quantitation of fragmented DNA, and flow cytometric analysis. RESULTS: Both melanocytes and G361 cells showed similar rate of apoptosis with gradual increment of UVB doses by the quantitation of fragmented DNA. However, flow cytometric analysis using scatter properties and PI stainability revealed that the melanocytes were more resistant to UVB than G361 cells. CONCLUSION: We suggest that melanocytes seem to be more resistant to UVB-induced injury than G361 cells. In addition, various methods for the detection of apoptosis might be necessary for its study. (Ann Dermatol 10:(3) 147152, 1998).