基底细胞样毛囊错构瘤并发粟丘疹

报告1例基底细胞样毛囊错构瘤.患者男,18岁.出生时即发现左侧颈部有一斑片,形态不规则,不痛不痒,境界清楚,较周围肤色浅,其上有丘疹和结节.皮损组织病理检查:真皮内基底样细胞呈条索状吻合,嵌于疏松基质内,其间有鳞状上皮细胞,细胞无异形性,未见有丝分裂象;免疫组化染色示Bcl-2(-),Ki-67(-),基质CD34(+).诊断:先天性局限型基底细胞样毛囊错构瘤.     

Acquired vulvar smooth muscle hamartoma: a case report and review of the literature

A 36-year-old Korean woman had had a flesh-colored, indurated plaque with pruritus on the labium majora for five years. The lesion was not found in association with hyperpigmented or hypertrichotic patches. Results of biopsy specimens showed an excess of haphazardly oriented smooth-muscle bundles in the mid to lower dermis with an unremarkable overlying epidermis. Our diagnosis was an acquired smooth-muscle hamartoma in the vulva. Although there have been previously reported cases of acquired smooth-muscle hamartoma, this was the first reported case in the vulva. We also describe the characteristics differing between our case and the six previously reported ones.     

Congenital smooth muscle hamartoma. A report of six cases and a review of the literature

Congenital smooth muscle hamartoma (CSMH) represents a proliferation of randomly oriented dermal smooth-muscle bundles. Six patients with CSMH were observed, the largest series to date, and the literature was reviewed. Congenital smooth muscle hamartoma has presented as congenital patches or slightly indurated plaques with prominent overlying hair (88% of cases), or rarely as patches with perifollicular papules without prominent hair (12% of cases). Most lesions (61% of cases) have been somewhat hyperpigmented, but 39% of cases have been flesh colored. Congenital smooth muscle hamartoma has occurred on the torso and proximal extremities, except for one case on the eyebrow and eyelid (present study). A positive pseudo-Darier's sign (temporary induration or piloerection after rubbing) helped to differentiate CSMH from congenital hairy nevo-cellular nevus. Congenital smooth muscle hamartoma is a distinct entity that is at one end of a spectrum that includes Becker's nevus, and should be considered in the differential diagnosis of any congenital hairy lesion.     

Congenital neurocristic cutaneous hamartoma with poliosis: A case report

Neurocristic cutaneous hamartomas (NCH) are rare, pigmented skin lesions derived from the abnormal migration of neural crest cells. We report the case of a 57‐year‐old female with a congenital localized area of poliosis and underlying pigmented patch on her scalp. Analysis of 2 punch biopsies yielded features consistent with NCH. Histopathology revealed schwannian‐differentiated spindle cells and melanocytic components in the dermis. The spindle cells stained positively for S‐100 and the stroma showed a prominent CD34 staining. The melanocytes were positive for melanoma triple stain (HMB‐45, Melan A, Tyrosinase) and S‐100. As the presentation of NCH and focal poliosis has yet to be described, we will present a literature review of NCH and discuss common features and associations of poliosis.     

Folliculosebaceous smooth muscle hamartoma

Cutaneous hamartomas are a group of heterogenous benign skin conditions demonstrating epithelial and mesenchymal components in varying proportions. Folliculosebaceous (cystic) hamartomas comprise a distinct group of uncommon cutaneous tumor-like malformations. Histologically, these lesions demonstrate varying proportions of adnexal and stromal tissues. We review the literature on folliculosebaceous hamartoma and report a case with smooth muscle as its only stromal component.     

Cutaneous smooth muscle hamartoma

This is a report of a case of a 12-year-old boy with an asymptomatic papular eruption present since birth, which showed the histological features of a hamartomatous proliferation of cutaneous smooth muscle cells, most likely of the arrectores pilorum muscles. The present paper describes the fine structure of this condition, for which the term "cutaneous smooth muscle hamartoma" is suggested.     

Acquired smooth muscle hamartoma

Smooth muscle hamartoma is an uncommon, usually congenital, cutaneous hyperplasia of the arrectores pilorum muscles. When it is acquired, it may be confused with Becker's nevus. We report a case of this rare tumor in a 19-year-old man. The disease started several years ago as multiple small skin-colored papules that subsequently coalesced to form a large soft plaque on the back of the left shoulder. The diagnosis of acquired smooth muscle hamartoma was confirmed on histopathology. The patient was reassured about the benign nature of the lesion and was not advised any treatment.     

A case of acquired smooth muscle hamartoma of the scrotum

We report a case of acquired smooth muscle hamartoma (ASMH) of tunica dartos, believed to be only the fifth so far reported. A 24-year-old man had a 6-month history of an asymptomatic tight and thickened scrotum. The skin was difficult to pinch. A biopsy specimen from the skin showed increased and proliferated smooth-muscle bundles composed of well-differentiated and uniform spindle cells that showed typical features of acquired smooth muscle hamartoma. Interestingly, dilatations of the lymph vessels were noted in the upper dermis above the proliferated smooth muscles. It has been reported recently that long-standing severe lymphoedema may cause histological features mimicking ASMH. As the present case was not preceded by oedema of the scrotum, we consider this case to be true ASMH.     

多发性小汗腺血管瘤样错构瘤一例

报道1例多发性小汗腺血管瘤样错构瘤.小汗腺血管瘤样错构瘤是一种少见的皮肤肿瘤.病理表现为增多的小汗腺结构和大量血管成分.本例患儿8岁,左前臂多发性皮下结节伴疼痛4年,近1年局部出现多汗、多毛.经组织病理检查结合临床表现,诊断为小汗腺血管瘤样错构瘤.浅层x线照射后效果不明显,后进行分次手术切除,疗效较佳.提示治疗小汗腺血管错构瘤选择适当的手术方案是可行的.