Nevus Lipomatous cutaneous superficialis (Hoffman-Zurhelle) is distinct clinical entity. A case is reported in which the lesions appeared in childhood and were elevated plaques and nodules in distribution on the tight side of the buttock.
Buttocks ; Nevus*

No abstract available.
Buttocks* ; Humans

Trichoadenoma is a rare benign tumor and it appears as a solitary tumor on the face and buttock. Histologically, it is characterized by numerous horny cysts lined with stratified squamous epithelium and solid epithelial tumor nests. This tumor is less mature than trichofolliculoma and more differentiated than trichoepithelioma, and it is considered as a tumor with differentiation toward the infundibular portion of the pilosebaceous canal. A 39-year-old woman presented with asymptomatic, solitary, 1.5x1.5 cm sized, pedunculated mass on her buttock for 2 years. Histopathologic examination showed characteristic features of trichoadenoma. Trichoadenoma is so rare that only 3 cases have been reported in the Korean literature.
Adult ; Buttocks ; Epithelium ; Female ; Humans

PURPOSE: The objective of this study was to evaluate the findings of ultrasonography (US) in patients withis-chial bursitis. MATERIALS AND METHODS: Our study included 27 patients (mean age 62 years) who underwent US fora painful mass or tenderness in the buttock area. In six of these 27, serous fluid was obtained by needleaspiration, and in five cases, bursal excision permitted histologic confirmation. The other sixteen patients werefollowed up for one or two months with only NSAID medication; all showed some improvement or remission of symptoms. Using a 5-10 MHz linear array probe, US examination was performed while the patient was lying facedown. US images were analyzed with regard to location and size of the lesions, thickness of cyst wall, thepres-ence of internal septa or mural nodules, echogenicity of the cyst wall, fluid content, internal septa,compressibility by a probe, and Doppler signals within the cyst wall. RESULTS: In all 27 patients, ischialbursitis was located superficially to ischial tuberosity. Lesion size(maximum diameter) was 1.5-7(mean 3.8)cm, andthe cyst wall was 0.2-0.8cm thick. Internal septa and mural nodules were seen in 12 cases (44%) and 13 cases(48%), respectively. The cyst wall was identifiable in 21 cases (78%), appearing as a single layer with lowechogenicity (n=10) or with high echogenicity (n=1); it also appeared as two (n=6) or three (n=4) layers ofdifferent echogenicities. When internal septa were present, fluid within the cyst was low echoic in 59% of cases,high echoic in 30%, and of mixed echogenicity (so-called compartmentalization) in 15%. In all cases, the cystbecame deformed, when compressed by a probe. In all patients who underwent doppler examination, some vascularitywas found within the cyst wall. CONCLUSION: US helped to detect ischial bursitis; US findings were thin-walled cystic lesion located superficially to ischial tuberosity, with or without internal septa and mural nodules, andeasy compressibility.
Bursitis* ; Buttocks ; Deception ; Humans ; Ultrasonography

Sclerosing epithelioid fibrosarcoma (SEF) is a rare and poorly recognized variant of fibrosarcoma of deep soft tissue. We report the case of a 34-year-old woman who presented with a painful and palpable mass in the left buttock that was diagnosed as SEF.
Adult ; Buttocks ; Female ; Fibrosarcoma ; Humans

We report here on a case of the giant and hyperkeratotic variant of porokeratosis. A 51-year-old man presented with a 30x20 cm sized extremely hyperkeratotic brownish verrucous plaque on his buttock. Histologic examination showed an increased number and size of the cornoid lamella, which displayed packed parakeratotic cells and the partial loss of the underlying granular layer. We diagnosed the patient with the giant and hyperkeratotic variant of porokeratosis on the basis of the clinical features and the characteristic histologic findings. Giant porokeratosis is a rare clinical condition among the several subtypes of porokeratosis, and the hyperkeratotic variant is an extremely rare clinical condition.
Buttocks ; Humans ; Middle Aged ; Porokeratosis

No abstract available.
Anal Canal ; Buttocks ; Mucins ; Nevus

A case of multiple trichilemmal cysts (TC) is presented. TC is known to be a kind of keratinous cyst with lining cells showing trichilemmal keratinization. About 90% of TC occur on the scalp. They are multiple in 70%, however, only 10% of the patients have been reported to have more than ten cysts. Therefore multiple TC on any other sites than scalp seem to be rare. A 37-year-old man presented with a twenty year duration of twelve nodular lesions on the back, chest, buttock, thigh, neck and scalp. All lesions were completely excised and microscopically examined, and showed histopathology compatible with TC.
Adult ; Buttocks ; Humans ; Neck ; Scalp ; Thigh ; Thorax

Nevus lipomatosus cutaneous superficialis is a fairly uncommon form of connective tissue disorder, and this is characterized by the ectopic deposition of fat lobules in the dermis. There are two clinical variants: the multiple and solitary types. Particularly for the case of the solitary forms, it seems preferable to regard them instead as pedunculated lipofibromas. We report here on a case of a nipple shaped solitary nevus lipomatosus cutaneous superficialis, and we also review the Korean cases. Till now, 22 cases in Koreahave been reported as a solitary nevus lipomatosus cutaneous superficialis and a pedunculated lipofibroma, or both. The review of the Korean cases revealed that solitary nevus lipomatosus cutaneous superficialis almost always exhibits a single skin-colored dome shaped or pedunculated nodule on the thigh and buttock, as well as on the non-girdle area after the 4th decade, and it has no histopathological difference from the multiple forms.
Buttocks ; Connective Tissue ; Dermis ; Nevus ; Nipples ; Thigh

A poroma has been thought to be derived from the peripheral cells of the eccrine duct. Nevertheless, there are some cases with sebaceous, follicular and apocrine differentiation, suggesting a possible apocrine origin. Herein, we report a 62-year-old man presented with a nodule surrounded by brownish plaque with hyperpigmented margin on the buttock for several months. Histopathologic examination revealed cords and broad columns of uniform poroid cells with sebaceous differentiation and melanin pigment.
Buttocks ; Humans ; Melanins ; Middle Aged ; Pigmentation ; Poroma*