Retiform hemangioendothelioma was differentiated from low-grade cutaneous angiosarcoma by Calonje et al. [1] in 1994; retiform hemangioendothelioma is a very rare tumor of the blood vessels, with less than 30 cases reported throughout the world [2]. The causes of retiform hemangioendothelioma are unknown [2]. Clinically, this tumor occurs mainly in the limbs of young adults, with greater occurr...

Haemangioendothelioma is a rare tumor that is both clinically and histologically intermediate between angiosarcoma and haemangioma. It is usually a solitary, slow-growing nodule on distal areas or extremities. The onset is frequently before 25 years of age with a male preponderance. Histologically, two components are important: dilated vascular channels and spindle cells elements with som...

1. Calonje E, Fletcher CD, Wilson-Jones E, et al. Retiform hemangioendothelioma: a distinctive form of low-grade angiosarcoma delineated in a series of 15 cases. Am J Surg Pathol 1994;18:115-25. 2. Hirsh AZ, Yan W, Wei L, et al. Unresectable retiform hemangioendothelioma treated with external beam radiation therapy and chemotherapy: a case report and review of the literature. Sarcoma 2010;2010:...

Retiform hemangioendothelioma is a rare intermediate or borderline neoplasm of the blood vessels that mostly occurs in extremities. Here we report a unique case of retiform hemangioendothelioma presented in the external auditory canal. 58-year-old male patient presented with the complaint of right ear swelling for 4 years. On examination, a spherical swelling in the right ear was found occludin...

Ovarian sex cord-stromal tumors arise from the stromal cells that surround and support the oocytes. Sertoli-Leydig cell tumors belong to this category of ovarian neoplasms. We present the case of a 38-year-old woman who was found to have a right ovarian mass. The mass was resected and diagnosed as Stage I Sertoli-Leydig cell tumor, retiform variant, following histopathologic and immunohistochem...

AIMS To determine the morphological and immunohistochemical profile of retiform Sertoli-Leydig cell tumours and to compare the observed profile with that of adult rete ovarii. METHODS AND RESULTS Nineteen retiform Sertoli-Leydig cell tumours were studied, eight by immunohistochemistry, and five examples of rete ovarii from adult females were also evaluated immunohistochemically. The patients ...

A 30-year-old female presented with multiple, erythematous, velvety, slowly growing, asymptomatic nodules on the scalp of two-year duration. Biopsy revealed a vascular tumor with arborizing blood vessels arranged in a retiform pattern, lined with hobnail endothelial cells that stained positively with CD34, with few intravascular papillae. Two year follow up of the case after surgical excision s...