No abstract available.
Epidermal Cyst* ; Herpes Zoster*

No abstract available.
Knee* ; Nevus* ; Organoids*

No abstract available.
Dermatitis, Allergic Contact

Proliferating trichilemmal tumor (PTT) is an uncommon neoplasm originated from the outer root sheath of a hair follicle. Malignant transformation occurs occasionally in proliferating trichilemmal tumors, which can be manifested by sudden rapid growths. Histologically, the malignant proliferating trichilemmal tumors (MPTTs) have shown severe nuclear atypia, marked cellular pleomorphism with atypical mitoses, dyskeratotic cells and infiltrating margins. Squamous cell carcinoma (SCC) should be differentiated with MPTT which indicates characteristic trichilemmal keratinization. Large tumor is considered as a risk factor of metastasis in SCC, but the relationship between tumor size and metastasis in the MPTT is not yet clarified. In this report, two patients have large erythematous nodules with focal ulceration and necrosis on their scalps and were diagnosed as MPTT. Despite the large sizes of the tumors, there were no evidences of metastases. Herein, we report 2 cases of the large MPTT which are presented without metastasis.
Carcinoma, Squamous Cell ; Hair Follicle ; Humans ; Mitosis ; Necrosis ; Neoplasm Metastasis* ; Risk Factors ; Scalp* ; Ulcer

No abstract available.
Adult ; Humans

No abstract available.
Angiofibroma ; Carbon ; Carbon Dioxide ; Lasers, Gas

BACKGROUND: Acquired bilateral nevus of Ota-like macules (ABNOM) is a dermal pigmented lesion common in individuals of Oriental origin. The Q-switched Nd:YAG laser (QSNYL) has been used successfully to treat a variety of benign, dermal, pigmented lesions, including nevus of Ota lesions. The similarity between ABNOM and nevus of Ota suggested that QSNYL may also be effective in the former. OBJECTIVE: To determine the efficacy and side-effect profiles of QSNYL treatment of ABNOM in Korean patients. METHODS: Of 42 Korean patients with ABNOM, 29 were treated with QSNYL (1,064 nm, 3 mm spot size, fluence 8~9.5 J/cm2), for up to 10 sessions each. Clinical photographs were taken before and after treatment. Lesion clearance was graded and complications such as hyperpigmentation, scarring, hypopigmentation, and erythema were assessed. RESULTS: Of the 29 treated patients, 19 (66%) showed excellent or good results. Of the patients who were treated more than 3 times, 76% showed good to excellent results. Two patients experienced post-laser hyperpigmentation (PLH), which persisted for more than one month, but no patient experienced persistent erythema or hypertrophic scarring. CONCLUSION: QSNYL is safe and effective in the treatment of ABNOM in Korean patients. Short-interval repetitive treatment is especially useful in improving therapeutic results and reducing PLH.
Cicatrix ; Cicatrix, Hypertrophic ; Erythema ; Humans ; Hyperpigmentation ; Hypopigmentation ; Laser Therapy ; Nevus ; Nevus of Ota

Chondrosarcoma is the second most commonly encountered primary malignancy of bone, accounting for as much as 20% of such tumors. It most frequently involves the large limb bones (femur, tibia, and humerus), the scapula, and the ribs. Metastases are relatively rare and tend to occur late in the course of the disease. The lungs are the most common site of metastases. Metastatic chondrosarcoma to the skin is extremely rare, with only 10 cases described in the English literature. We herein report a case of disseminated cutaneous metastases from chondrosarcoma, presented as multiple papules and nodules on the trunk, scalp, and upper extremities.
Accounting ; Chondrosarcoma ; Extremities ; Hip ; Lung ; Neoplasm Metastasis ; Ribs ; Scalp ; Scapula ; Skin ; Tibia

Proliferative fasciitis is a rare, rapidly growing, pseudosarcomatous nodule of subcutaneous tissue. It commonly occurs on the extremities. Lesions on the head and neck are exceedingly rare. Histopathologically, it is characterized by several large basophilic ganglion-like cells deposited in a myxoid stroma with spindled cells. Herein, we report a case of a 54-year-old man who noticed a nodule on his right cheek about six months before examination. At first, its size abruptly increased, and then remained without any change in size. Microscopically, many basophilic ganglion-like cells and spindled cells were deposited in a myxoid stroma. Immunohistochemically, ganglion-like cells and spindled cells were strongly positive for vimentin and weakly positive for smooth muscle actin and CD68. Although it was not radically excised, the lesion has not been found for 3 months.
Actins ; Basophils ; Cheek ; Extremities ; Fasciitis ; Head ; Humans ; Middle Aged ; Muscle, Smooth ; Neck ; Subcutaneous Tissue ; Vimentin

Trichodiscoma are hamartomas of the dermal portion of the hair disc, and these are found as asymptomatic flesh- colored papules 1~3 mm in diameter, and they are usually located on the face, trunk and thigh. Histopathologically, this is characterized by non-encapsulated fibrovascular lesion with a myxoid stroma surrounded by folliculo- sebaceous units. Birt-Hogg-Dube syndrome, which develops multiple trichodiscomas with fibrofolliculomas and skin tags, has been described. The case of solitary trichodischoma is rare. We recently encountered a 29-year-old woman with a solitary, dome-shaped papule on the right thigh. After histopathologic examination, the lesion was diagnosed as trichodiscoma.
Adult ; Birt-Hogg-Dube Syndrome ; Female ; Hair ; Hamartoma ; Humans ; Skin ; Thigh