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*

OBJECTIVE: To investigate the expression profile of miR-122-5p in melanoma tissues and the effect of miR-122-5p on the proliferation, cell cycle and apoptosis of human melanoma cell lines SK-MEL-110 and A375. METHODS: The expression profiles of miR-122-5p in melanoma and pigmented nevus tissues were detected using real-time fluorescence quantitative PCR (qRT-PCR). SK-MEL-110 and A375 cells transfected with miR-122-5p inhibitor or negative control inhibitor (NC) I were examined for miR-122- 5p expression using qRT-PCR and changes in cell proliferation, cell cycle and apoptosis using MTT assay or flow cytometry. NOP14 mRNA and protein expressions in the cells were detected using qRT- PCR and Western blotting, respectively. Luciferase reporter assay was used to confirm the identity of NOP14 as the direct target of miR-122-5p. RESULTS: The relative expression of miR-122-5p in human pigmented nevus tissues and melanoma tissues was 1.23±0.270 and 7.65 ± 1.37, respectively. The relative expression of miR-122-5p in SK-MEL-110 and A375 cells transfected with miR-122-5p inhibitor was 0.21 ± 0.08 and 0.17 ± 0.05, respectively. miR-122-5p inhibitor obviously inhibited the cell proliferation and increased the percentage of cells in G1 stage in both SK-MEL-110 and A-375 cells, but did not cause obvious changes in the apoptosis of the two cells. miR-122-5p inhibitor did not significantly affect the expression level of NOP14 mRNA, but obviously increased the expression level of NOP14 protein. Luciferase reporter assay revealed a significantly lower luciferase activity in cells co-transfected with miR-122-5p mimics and wild-type psi-CHECK2-3'UTR plasmid than in the cells cotransfected with NC and wild-type psi-CHECK2-3'UTR plasmid (0.21 ± 0.14 0.56 ± 0.1, < 0.01). CONCLUSIONS miR-122-5p expression is upregulated in melanoma tissues, indicating its involvement in the development of melanoma. miR-122-5p inhibits the proliferation of SK-MEL-110 and A-375 cells possibly by affecting the cycle through NOP14.
Apoptosis ; Cell Cycle ; Cell Line, Tumor ; Cell Proliferation ; Humans ; Luciferases ; metabolism ; Melanoma ; etiology ; metabolism ; pathology ; MicroRNAs ; antagonists & inhibitors ; metabolism ; Neoplasm Proteins ; metabolism ; Nevus, Pigmented ; etiology ; metabolism ; pathology ; Nuclear Proteins ; metabolism ; Skin Neoplasms ; etiology ; metabolism ; pathology ; Up-Regulation

BACKGROUND: There have been many changes to the social and medical environment in Korea and many studies showed a steady increase of cutaneous tumors. But none of them included a data occurring from head and neck. OBJECTIVE: To investigate the incidence and distribution of the cutaneous tumors of the head and neck. METHODS: A total of 1,415 cases of head and neck cutaneous tumors were obtained from pathology specimen at Department of Dermatology between 2010 and 2014. RESULTS: Among 1,415 cases of head and neck cutaneous tumors, 871 cases (61.5%) were benign tumors, 271 cases (19.2%) were malignant tumors, and 273 cases (19.2%) were premalignant lesions. The most common benign head and neck cutaneous tumors was epidermal cyst with 188 cases (21.6%), followed by 173 cases (19.9%) of seborrheic keratosis, 71 cases (8.2%) of intradermal nevi. Among the 271 cases of malignant head and neck cutaneous tumors, there were 164 cases (60.5%) of basal cell carcinoma, 89 cases (32.8%) of squamous cell carcinoma, 5 cases (1.8%) of malignant melanoma. The predilection sites of malignant head and neck tumors were face (87.5%), ear (4.8%) and neck (4.0%). Of the premalignant lesions, there were 210 cases (76.9%) of actinic keratosis, 36 cases (13.2%) of Bowen's disease and 27 cases (9.9%) of actinic cheilitis. CONCLUSION: In our study, the proportion of malignant tumors and premalignant lesion in head and neck tumors was higher than previous reports. Also, the percentage of woman in malignant tumors and premalignant lesions was higher than man, unlike previous studies. However, these results had limitation associated with retrospective study in a single institution, and further prospective study with multi-center is required for confirmation.
Actins ; Bowen's Disease ; Carcinoma, Basal Cell ; Carcinoma, Squamous Cell ; Cheilitis ; Clinical Study* ; Dermatology ; Ear ; Epidermal Cyst ; Female ; Head* ; Humans ; Incidence ; Keratosis, Actinic ; Keratosis, Seborrheic ; Korea ; Melanoma ; Neck* ; Nevus, Intradermal ; Pathology ; Prospective Studies ; Retrospective Studies

PURPOSE: To report the relative frequency and clinical characteristics of patients with benign eyelid tumors. METHODS: A retrospective study of 192 consecutive patients admitted to Korea University Ansan Hospital with benign eyelid tumor between January 2009 and December 2014 was undertaken, and clinical records including age, sex, involved site, and pathology of tumors were reviewed retrospectively. All eyelid tumors were confirmed histopathologically. RESULTS: The sexual distribution revealed 87 males and 105 females with benign eyelid tumors. The mean age at diagnosis was 42.6 +/- 19.2 years. Molluscum contagiosum (5.5 +/- 3.5 years) and pilomatrixoma (14.0 +/- 15.6 years) were generally found in younger individuals, while seborrheic keratosis (60.2 +/- 15.8 years) and squamous cell papilloma (50.5 +/- 13.4 years) occurred predominantly in elderly patients. Tumors were most common on the upper lid (63.0%). The four most frequent subtypes were melanocytic nevus (37.5%), epidermal cyst (8.3%), squamous cell papilloma (5.7%), and seborrheic keratosis (5.2%). CONCLUSIONS: The most common histopathological diagnosis of benign eyelid tumors was melanocytic nevus. The results of this study provide epidemiological information that will be useful for diagnosis and therapy of such tumors.
Aged ; Diagnosis ; Epidermal Cyst ; Eyelids* ; Female ; Gyeonggi-do ; Humans ; Keratosis, Seborrheic ; Korea ; Male ; Molluscum Contagiosum ; Nevus, Pigmented ; Papilloma ; Pathology ; Pilomatrixoma ; Retrospective Studies

No abstract available.
Base Sequence ; Child, Preschool ; DNA/chemistry/metabolism ; Female ; Humans ; Mutation ; Nevus, Pigmented/diagnosis/*genetics ; Polymorphism, Single Nucleotide ; Proto-Oncogene Proteins p21(ras)/*genetics ; Republic of Korea ; Skin/pathology ; Skin Neoplasms/diagnosis/*genetics ; Syndrome

OBJECTIVETo investigate the surgical techniques and therapeutic effect of eyelid divided nevus.

METHODSFrom January 2000 to January 2014, 27 cases with 27 eyelid divided nevi were treated by staged excision (2 cases), or full-thickness skin graft (20 cases) or frontal and facial expanded flaps (3 cases), or combined expanded flaps with skin grafts (2 cases) for large lesions. One case with skin graft underwent secondary treatment with expanded flap due to obvious scar.

RESULTSExcept for one case with residue lesion (0. 5 cm x 0. 5 cm), all the other cases underwent successful treatment with primary healing. All the patients were followed up for 3-48 months (average, 7. 4 months). Except for one case with secondary expanded flap treatment, all the other patients were satisfied with aesthetic and functional results. No occurrence happened.

CONCLUSIONSStaged excision and full-thickness skin grafts are simple and effective method for eyelid divided nevus. For large lesions, expanded flap, or combined with skin graft should be considered.

Cicatrix ; surgery ; Esthetics ; Eyelid Neoplasms ; pathology ; surgery ; Humans ; Nevus ; pathology ; surgery ; Skin Transplantation ; Surgical Flaps ; Tissue Expansion ; Wound Healing

Happle-Tinschert syndrome is a disorder causing unilateral segmentally arranged basaloid follicular hamartomas of the skin associated with ipsilateral osseous, dental and cerebral abnormalities including tumors. Although a case with hemimegalencephaly was previously described, this is the first report of Happle-Tinschert syndrome with discrepant short left leg, ipsilateral skin lesions, hemimegalencephaly and frontal polymicrogyria.
Basal Cell Nevus Syndrome/diagnosis ; Child ; Dental Enamel/abnormalities ; *Frontal Lobe/pathology ; Hamartoma/*diagnosis/pathology ; Humans ; Leg Length Inequality/*diagnosis ; Magnetic Resonance Imaging ; Male ; Malformations of Cortical Development/*diagnosis ; Skin Diseases/*diagnosis/pathology ; Syndrome

OBJECTIVETo study the possibility of removal melanin granules from autogenic acellular dermal matrix of giant nevus tissue by H2O2 bleaching technique.

METHODSA total of 32 skin specimens (0.5 cm x 0.5 cm) from giant nevus tissue and 1 piece (0.5 cm x 0.5 cm) of normal skin were obtained from the surgical removal. One giant nevus tissue was chosen as control. The others and the normal skin tissue were treated with solution of 0.25% Dispase II for digestion for 24 hours under normal temperature to remove epidermis. Then each piece was immerged into solution of 0.5% Triton X-100 for digestion for 48 hours in normal temperature. One giant nevus tissue and the normal skin tissue were chosen as control. The others were immerged into solution of different concentrations of H2O2, treated under different temperature and lasting for different period. Lastly, all specimens were treated with HE staining, immunohistochemical staining, light microscopy and so on.

RESULTSAfter giant nevus tissues were treated with solution of 0.25% Dispase II and immerged into solution of 0.5% Triton X-100 in normal temperature, nevus cells and all other cellular components of pigmented nevus tissues can be effectively removed, there were the cavities left by removal of cells without any residual cell debris, but still remaining part of pigment. Then each specimen were immerged into solution of different concentrations of H2O2, under different temperature and lasting for different period which can remove residual melanin granules. In solution of 3% H2O2 for 36 h under 37 degrees C, can remove all the melanin particles, the content of collagen type I in the obtained specimen was not changed. Collagen fibers were uniform in thickness, regular in arrangement with no obvious degeneration.

CONCLUSIONSWith solution of 0.25% Dispase II and solution of 0.5% Triton X-100 in normal temperature, all cells in nevus tissue can be removed effectively. Further treatment with 3% H2O2 at 37 degrees C for 36 h can remove all the melanin particles, while collagen type I has no obvious change. The preparation of acellular dermal matrix of the giant nevus may possibly be applied as autologous tissue implant to repair tissue defects.

Acellular Dermis ; Endopeptidases ; pharmacology ; Epidermis ; Humans ; Hydrogen Peroxide ; pharmacology ; Melanins ; Nevus ; pathology ; Nevus, Pigmented ; pathology ; Octoxynol ; pharmacology ; Skin Lightening Preparations ; pharmacology ; Skin Neoplasms ; pathology ; Skin Pigmentation ; drug effects ; Skin Transplantation ; Surface-Active Agents ; pharmacology

OBJECTIVETo study the clinicopathologic features, differential diagnosis and prognosis of proliferative nodules(PNs) in congenital melanocytic nevi(CMN).

METHODSHistopathologic evaluation and immunohistochemical study by EnVision method were carried out in 8 cases of PNs in CMN. The clinical information and follow-up data were analyzed.

RESULTSThe age of patients ranged from 1 to 54 years (mean 27.6 years). Tumors were located on face (3 cases), on back (2 cases), upper extremities (2 cases) and lower extremities(1 case). Microscopically, PNs with expansile growth were observed in 8 cases of CMN. Melanocytes in PNs show variable pleomorphism with a mitotic activity of 0 to 4 per 10 high power fields. Blending of cells with adjacent CMN was noted in 6 cases. According to the morphology of melanocytes in PNs, it was classified into different types including large oval melanocytes (4 cases), small melanocytes (2 cases) and Spitz-nevus-like forms (2 cases). Immunohistochemically, melanocytes in PNs were consistent with those in adjacent CMN. They were diffusely positive for S-100 protein, but were either negative or focally positive for HMB45. Less than 5% of melanocytes were positive for Ki-67 in 8 cases of PN. Follow-up was available in all cases, ranging from 9 to 82 months. Seven patients with excision of single PN in CMN were alive with no evidence of disease, while 1 patient with multiple PNs in CMN was stable with disease after 62 months follow-up.

CONCLUSIONSPN is a rare melanocytic lesion arising in CMN. Recognition of its specific histologic features can help to avoid being misdiagnosed as melanoma. Long term follow-up should be recommended in patients with PNs, especially in those with atypical histologic features. Further investigation is needed to elucidate its clinical behavior.

Adolescent ; Adult ; Back ; Child ; Child, Preschool ; Diagnosis, Differential ; Extremities ; Facial Neoplasms ; pathology ; Female ; Humans ; Infant ; Male ; Melanocytes ; pathology ; Middle Aged ; Nevus, Pigmented ; pathology ; Prognosis ; Skin Neoplasms ; pathology

Dentigerous cysts are benign odontogenic cysts that are associated with the crowns of permanent teeth. They are developmental epithelial-lined lesions which are formed from fluid accumulation in the space between the reduced enamel epithelium and the surface of crown. This may occure due to the obstructin of venous return caused by tooth impaction. The most prevalent location of dentigerous cysts are the third molar of mandible. While the single dentigerous cysts are the second most common odontogenic cysts following the radicular cysts of jaw, multiple cysts are observed in patients with some conditions such as mucopolysaccharidosis type IV, basal cell nevus syndrome, and cleidocranial dysplasia. They occur in young patients in the second or third decades of life, but it is a rare occurrence for children. A sixteen-year-old girl with painful swelling in the right mandible visited to our department. All routine laboratory test results were within normal limits. However, we were able to diagnose that she had facial asymmetry. Computed tomography showed a well-defined soft tissue mass obliterating right mandible ramus with an impacted tooth. We performed total enucleation of cyst and molar tooth. The pathology revealed a non-keratinized squamous epithelial lined cyst associated with an undamaged tooth.
Basal Cell Nevus Syndrome ; Child ; Cleidocranial Dysplasia ; Crowns ; Dental Enamel ; Dentigerous Cyst* ; Epithelium ; Facial Asymmetry ; Female ; Humans ; Jaw ; Mandible* ; Molar ; Molar, Third ; Mucopolysaccharidoses ; Odontogenic Cysts ; Pathology ; Radicular Cyst ; Tooth ; Tooth, Impacted