This clinical and histopathological study was performed with 147 cases of benign mielanocytic tumors and 19 cases of malignant melanomas, which were obtained as surgical specimens from 1974 to 1984 at Department of Clinical Pathology, Catholic Medical College. The results were as follows: 1, In 89 cases of acquired benign melanocytic nevi, the average age of intradermal type(64 cases) was 34. 7 years and that of compound type(24 cases) was 24. 6 years. 2. In 30 cases of congenital nevus, nevus cells were present in the lower two thirds of reticular layer of the dermis in 93. 3% and in the subcutis as well in 3.3%. A case of giant congenital nevus with balloon cell appearance was found. 3. Of the 147 benign melanocytic tumors, a pigmented spindle cell nevus and a desmoplastic nevus were observed. 4. Blue nevi were 11 in number and excised from the face in 7, buttock in 2, shoulder in 1, upper arm in 1, and all were common type histopathologically. 5. Twelve malignant melanornas which were possible to be re-examined histopathologically were composed of 5 nodular type, 3 acral lentiginous type, 1 superficial spreading type and 3 metastatic malignant melanoma.
Arm ; Buttocks ; Dermis ; Melanoma* ; Nevus ; Nevus, Blue ; Nevus, Pigmented ; Nevus, Spindle Cell ; Pathology, Clinical ; Shoulder

Child, Preschool ; Humans ; Male ; Nevus, Blue ; pathology ; Skin Neoplasms ; pathology

A 3-year-old boy presented with bluish patch and scattered blue spots on the left side of his face. After several sessions of laser treatment, the azury patch in the periorbital area became even darker. Histopathology showed many bipolar, pigment-laden dendritic cells scattered in the papillary and upper reticular dermis. Immunohistochemically, these cells were positive for S100, SOX-10, melan-A, P16, and HMB-45. The positive rate of Ki-67 was less than 5%. Finally, the lesion was diagnosed with nevus of Ota concurrent with common blue nevus. Therefore, for cases of the nevus of Ota with poor response to laser treatment, the possible coexisting diseases should be suspected.
Male ; Humans ; Child, Preschool ; Nevus, Blue/pathology* ; Nevus of Ota/therapy* ; Skin/pathology* ; Face ; Skin Neoplasms/pathology*

Adult ; Female ; Humans ; Middle Aged ; Nevus, Blue ; pathology ; Uterine Cervical Neoplasms ; pathology

Capsule Endoscopy ; Child, Preschool ; Female ; Gastrointestinal Neoplasms ; etiology ; pathology ; Humans ; Lymphangioma, Cystic ; etiology ; pathology ; Nevus, Blue ; etiology ; pathology ; Skin Neoplasms ; etiology ; pathology