A basal cell epithelioma on another basal cell epithelioma

A basal cell epithelioma (BCE) apparently developed on another BCE, a hitherto undescribed condition to our knowledge. Fifteen specimens were prepared at representative planes, but there were no connections between the two tumors. In order to indirectly verify that there were two different tumors, the speed of growth was calculated; it roughly agreed with the calculation by Ono's formula, attesting to the diagnosis of BCE.     

Mutilating basal cell epithelioma

A 49-year-old man was found to have a rare, mutilating basal cell epithelioma of the face. Conventional early therapy with surgery and radiotherapy did not halt the progress of the disease in a hospital environment. The patient died 12 years later.     

Pigmented basal cell epithelioma

Light and electron microscopic studies have been carried out on three pigmented basal cell epitheliomas and on cell cultures of two of these tumours, to determine the formation and transfer of pigment and the fine structure of the constituent cells. Scattered in the epithelial tumour buds were many functional melanocytes that contained melanosomes in various stages of development and whose morphology was essentially normal. Many melanophages were present in the dermal stroma, but few transferred melanosomes were to be found in the epithelial tumour cells. Tissue culture studies revealed that melanocytes were present among the proliferating islands of epithelial cells and these contained many melanosomes. However, few melanosomes were found in the epithelial cells. This study indicated a block in the transfer of pigment from the melanocyte to the basal epithelioma cells. Several of the cultured epithelial cells were found to contain dense bundles of filaments resembling amyloid. It is likely that they are abnormal tonofilaments resulting from the differentiation and keratinization of basal cells in vitro.     

Uncommon location of basal cell epithelioma

The authors present three patients with the relatively rare location of basal-cell epithelioma in the axilla. The patients were surgically treated.     

The blue-gray cystic basal cell epithelioma

We report, in two men, the occurrence of a tiny, dome-shaped, blue-gray cystic nodule of the face. The nodule in both men clinically simulated an eccrine or apocrine hidrocystoma. Histologic examination revealed that both were cystic basal cell epitheliomas. These cases are reported in order to bring this unusual clinical presentation of basal cell epithelioma to the attention of clinicians.     

浅表型基底细胞上皮瘤一例

患者女,84岁,因左上臂内侧局部糜烂迁延不愈6年,于2008年5月17日来我科就诊.患者于6年前无明显诱因出现左上臂内侧局部浅表性糜烂,迁延不愈,皮损缓慢扩大,无明显自觉症状.曾在当地行相关诊治(具体不详),疗效欠佳.     

Nevoid basal cell epithelioma syndrome in Japan

A 49-year-old Japanese man with typical features of nevoid basal cell epithelioma syndrome is reported. The patient had cystic lesions of the jaw bone, multiple basal cell epitheliomas of the scalp and face, pits on the palms and soles, bifid ribs, scoliosis and calcification of the falx cerebri. In Japan five certain cases have been reported previously. We added one new case and reviewed the other five cases briefly.     

Cytoid bodies in basal cell epithelioma]

100 basal cell epitheliomas were surveyed for the presence of cytoid bodies by histological and histochemical techniques. By this means a differentiation of the following structures was possible: 1. Elastic globes were present in 32 specimens. Their localisation corresponded in part to the typical subepidermal situation, but invasive tumor growth resulted in their translocation into the deeper corium. 2. Civatte bodies were found in the dermoepidermal junction area in 16 cases. Similar structures were present within the tumor cell islands of 37 patients. 3. Russel bodies could be observed within the inflammatory peritumoral infiltrate containing numerous plasma cells in 30 specimens. 4. Clumpy or ovoid deposits of amyloid were present within the stroma of 41 epitheliomas, whereas no amyloid was found in the tumor cell islands.     

Characterization of basal cell epithelioma in the Japanese

Clinicopathological and statistical studies were made on one hundred and fifty-six Japanese cases of basal cell epithelioma. A new formula was presented for the calculation of the growth rate of BCE, as follows, Size of tumor (major axis × minor axis) (mm²) = 1.7363 × T² + 133.1192 T = Years which had elapsed from the presumed time of onset to the time of the first examination The yearly growth in diameter calculated from the above formula is less than 1.0 mm within ten years after onset, and 1.0 mm to 1.3 mm thereafter. The time needed for BCE to double its size averaged 8.8 years in the present study. In addition to the slow rate of progression, BCE in the Japanese was characterized by its pigmentation; 84% were either partially or totally pigmented, giving the BCE the so-called black and pearly appearance.     

Blue-white variant of pigmented basal cell carcinoma

Background

Basal cell carcinoma (BCC) is the most frequent of all skin cancers in the white population. The typical dermoscopic features of pigmented BCCs have been well known. In the literature a new dermoscopic pattern of BCC has been reported as “blue-white variant”.

色素性基底细胞癌一例

患者女,67岁.主因左耳后皮疹20年,溃烂2年余就诊.患者自述20年前左耳后长出一绿豆大小皮肤色丘疹,无自觉症状,数年后丘疹略增大,表面变粗糙,当地医院诊断刺瘊,自行数次用头发捆勒祛除之,未见效,皮疹增长缓慢无不适感.近5年常令其子用烟头烫,2年来丘疹反复糜烂、渗液、结痂,基底渐增大,色变黑,皮疹增大至鸽卵大小,中心溃烂不愈,无痛、痒感.