Indeterminate cell proliferations are rarely described in dermatology literature. Indeterminate cells are characterized by positivity for S-100 protein and CD-la, but are distinguished from Langerhans cells by the absence of Birbeck granules. We present a case of congenital indeterminate cell histiocytoma in a 6-day-old male infant. A Skin examination revealed a solitary, erythematous, 6*6cm, superficially crusted, dome shaped papule on his forehead. A Histopathologic examination showed a dense cellular infiltrate in the dermis, below the atrophic epidermis. Frequently, the nucleus demonstrated a single cleft or crease like the shape of a kidney. These cells showed positivity for S-100 protein. Birbeck granules were not found on electron microscopic examination.
Dermatology ; Dermis ; Epidermis ; Forehead ; Histiocytoma* ; Humans ; Infant ; Kidney ; Langerhans Cells ; Male ; S100 Proteins ; Skin

Lichenoid keratosis (LK), a lichen planus-like keratosis, is a rather frequent skin disorder that has some histological features similar to lichen planus. However, the classification system for LK has not been settled. We report two cases of LK and propose a new classification for LK correlating with clinicohistopathological findings.
Actins* ; Classification ; Keratosis* ; Lichen Planus ; Lichens ; Skin

Cutaneous metastasis from parotid gland carcinoma is very rare and there have been no re-ports in Korean literatures. Furthermore, it can often manifest as inflammatory type of skin metastasis and mimic a radiodermatitis. We report a case of a 31-year-old Korean man with cutaneous metastasis originated from parotid gland mucoepidermoid carcoinoma which mimicked clinically a radiodermatitis.
Adult ; Carcinoma, Mucoepidermoid* ; Humans ; Neoplasm Metastasis* ; Parotid Gland* ; Radiodermatitis* ; Skin*

Winkelmann granuloma is a very rare disorder characterized by histologic findings of perhaps[ic] infiltration, collagen degeneration, and granulomatous inflammation, which usually show palisading features. A number of diseases, especially systemic immunoreactive diseases, are associated with this disorder. We describe a focal neutrophilic necrosis : type of Winkelmann granuloma associated with hypothy- roidism and rheumatoid arthritis.
Arthritis, Rheumatoid* ; Collagen ; Granuloma* ; Hypothyroidism* ; Inflammation ; Necrosis ; Neutrophils

Cutaneous pseudolymphoma (CPL) has a microscopic appearance that resembles that of cutaneous lymphoma, but shows a clinically benign course. The differential diagnosis of CPL with cutaneous lymphoma is very important because clinical outcomes of them are quite different. We herein describe two cases of B-cell pseudolymphoma, which were difficult to differentiate from cutaneous B-cell lymphlma. All of two cases, Polymerase chain reaction of immunoglobulin heavy chain gene rearrangement showed polyclonal pattern.
B-Lymphocytes* ; Diagnosis, Differential ; Gene Rearrangement ; Immunoglobulin Heavy Chains ; Lymphoma ; Polymerase Chain Reaction ; Pseudolymphoma*

Churg-Strauss syndrome (CSS) is a very rare disease which combines the features of asthma, hypereosinophilia, multisystem necrotizing vasculitis and extravascular granuolma. To our knolwedge, there have been four reports in Korean journals, but none in dermatology journals. We report a 37-year-old male who had allergic rhinitis, pansinusitis, a history of atopic dermatitis, multiple prurigo-nodularis like skin lesions, non-fixed interstitial lung in-filtration, hypereosinophilia and subclinical asthma. Clinical and histopathological features of his skin lesions were nonspecific where perivascular lymphocytic infiltration and mild lymphocytic vasculitis were shown. The presence of a pituitary mass and proximal myopathy as op-posed to peripheral neuropathy have not been reported in previous reports of CSS. However, other features of our patient met the criteria of CSS.
Adult ; Asthma ; Churg-Strauss Syndrome* ; Dermatitis, Atopic ; Dermatology ; Humans ; Lung ; Male ; Muscular Diseases ; Peripheral Nervous System Diseases ; Rare Diseases ; Rhinitis, Allergic ; Skin ; Vasculitis

We report a case of actinic granuloma in a 39 year-old woman who was presented with multiple anetoderma on non-sun exposed skin such as the neck, upper arms, elbows and calfs. The anetodermic presentation of actinic granuloma has never been reported and the common pathogenesis involving reduction of elastic fibers link the two disorders. Anetoderma secondary due to actinic granuloma should to be included in the list of secondary anetoderma and may suggest one of the possible pathogenesis of anetoderma.
Actins* ; Adult ; Anetoderma* ; Arm ; Elastic Tissue ; Elbow ; Female ; Granuloma* ; Humans ; Neck ; Skin

Plexiform neurilemmoma is a relatively rare, benign peripheral nerve sheath tumor, whieh usually arises in either the dermis or subcutaneous tissue. These tumors may occur singly or as multiple lesions (plexiform neurilemmomatosis), We report an unusual case of plexiform neurilemmomatosis associated with cafe au lait spots reminiscent of neurofibromatosis clinically and another case of plexiform neurilemmoma on the finger. A Biopsy revealed the characteristic palisaded arrangement of spindle cells within well circumscribed elongated nodules, The skin lesions were completely excised without recurrence thereafter.
Biopsy ; Cafe-au-Lait Spots ; Dermis ; Fingers ; Neurilemmoma* ; Neurofibromatoses ; Peripheral Nerves ; Recurrence ; Skin ; Subcutaneous Tissue

BACKGROUND: The clinical efficacy of oral isotretinoin in the treatment of severe acne is well established but there is no published data about the recurrence rate and the optimum dose for lowest recurrence in Korean patients. OBJECTIVE: The objective of this study was to determine the recurrence rate after one course of isotretinoin in oriental cases. METHODS: Sixty eight cases were available which fulfilled the inclusion criteria ; clearing af- l ter one course more than 10 weeks and at least two year follow-up thereafter. Isotretinoin was used with oral dosage 0.3-1 mg/kg/day (0.6±0.1) with duration from 10 to 46 weeks (19.7±6.2). RESULTS: Overall, 78% of patients had relapsed with most requiring topical antibiotic therapy only. In patients receiving more than 120 mg/kg, the percentage without recurrence was 75 % which was significantly higher (p<0.001) in comparison with only 15 % among patients receiving less than 120 mg/kg. Doses between 100 and 120 mg/kg were not as effective as those ones with more than 120 mg/kg for preventing recurrence. CONCLUSION: The results indicate that moderate doses of isotretinoin are well tolerated and pro-duce excellent clearing. However, in order to minimize recurrence rate, the optimum dose may be at least over 120 mg/kg of the cumulative dose which means more than 6 months of treatment in most of the Korean patients with acne.
Acne Vulgaris* ; Follow-Up Studies ; Humans ; Isotretinoin* ; Recurrence*

A 57-year-old Korean man with malignant fibrous histiocytoma (MFH) on the leg is presented. Histopathologic examination was consistent with a pleomorphic -storiform subtype of MFH with highly pleomorphic cellular features and frequent mitosis. According to recent evidences, MFH might be a heterogenous group of poorly differentiated tumors rather than a distinct entity. Our case was only positive to CD68 and vimentin immunohistochemically.
Histiocytoma, Malignant Fibrous* ; Humans ; Leg ; Middle Aged ; Mitosis ; Vimentin