Angiokeratoma is described by various authors as a rare variant of the hemangioma in the dog, characterized by a vascular component, like all types of vascular neoplasms, but also by an epithelial component. A case of angiokeratoma is described in a male 8-year-old dog. The tumor was located in heavily pigmented skin on the anterior surface of the front limb and not in the more usual previously described locations, eyelid and conjunctiva. Microscopic examination revealed a well-circumscribed mass with irregular hyperplasia of the epidermis and dilated vascular spaces filled with blood in the superficial dermis. (+info)
Angiokeratomatous papilloma associated with papillomavirus in a calf.
A female 8-month-old Simmental calf was presented with a history of a gradually enlarging mass in the ventral abdominal skin since 4 months of age. The mass was well circumscribed, lightly pigmented, and rough surfaced with many fine fissures and was attached to the skin by a relatively broad pedicle. On cut section, there was a border between the reddish-black stroma and overlying epithelium, including hemorrhagic foci of variable sizes. Histologically, the tumor was papillomatous with angiokeratomatous features and irregular hyperplasia with epidermal rete ridges and dilated vascular channels filled with blood in the superficial dermis. In the epidermis, orthokeratotic hyperkeratosis, variably sized keratohyalin granules, and many koilocytes, some of which had papillomavirus (PV) genus-specific structural antigen-positive nuclei, were also observed. Cells lining the dilated vascular spaces were positive for vimentin and alpha-smooth muscle actin but negative for factor VIII-related antigen, desmin, and PV. The lesion was regarded as an angiokeratomatous papilloma and was similar to other angiomatous lesions. (+info)
The renal lesion in angiokeratoma corporis diffusum (Fabry's disease).
Electron microscopic details of the glomerular and tubular lesions in a 26-year-old man with angiokeratoma corporis diffusum are presented. Though unable to concentrate urine above a specific gravity of 1.012, this patient showed preservation of the ability to acidify and alkalinize the urine following oral loads of ammonium chloride (150 mEq./day) and sodium bicarbonate (158 mEq./day) for several days. This observation is in contrast to previously reported findings and suggests that the regularly observed hyposthenuria in this disease does not depend on defects in ion transfer in the distal tubule system. (+info)
Angiokeratoma of the scrotum: a case of scrotal bleeding.
A 26-year-old man presented to the emergency department after a spontaneous 30 min bleed from his scrotal skin. He showed no other symptoms and denied any past medical history. He was exclusively sexually active, systemically well and haemodynamically stable. There were numerous (>50) 1-2 mm dark red, erythematous papules over the scrotum, sparing the shaft of penis, inner thigh and abdomen. A small area of blood marked the bleeding spot as a single papule. A diagnosis of angiokeratoma of the scrotum (Fordyce) was made and potential precipitants such as intra-abdominal masses, urinary tract tumours, varicoceles, hernias and angiokeratoma corporis diffusum (Fabry syndrome) were excluded. He was discharged with dermatology follow-up with a view to local laser treatment. The important differential diagnoses are angiokeratoma corporis diffusum and malignant melanoma (nodular type). In females, Fordyce angiokeratoma are distributed on labia majora. (+info)
Angiokeratoma of the glans penis: clinical, histopathological and dermoscopic correlation.
Angiokeratoma is a benign vascular lesion characterized by vascular ectasia in the upper dermis and hyperkeratosis. We report a case with lesions on the glans penis, a very rare location. In addition, we report the dermoscopic findings. (+info)
Solitary angiokeratoma of the tongue.
Angiokeratoma is a rare cutaneous lesion. It can be either a generalized systemic form, presenting as multiple asymptomatic papules on the skin, associated with metabolic diseases or a solitary cutaneous form. Oral cavity involvement is more common in the systemic form, as a part of a more generalized cutaneous disease, but very rare in the localized form of angiokeratoma. A 45-year-old female presented with a painless lesion on the tongue of one months duration, which bled occasionally. On clinical examination, a lesion of approximately 5 mm in diameter was observed on the left surface of the tongue. The lesion was purple in color with a granulomatous appearance. There were no other changes in the oral mucosa. On dermatologic examination, no angiokeratomas were found, anywhere on the skin. The lesion was excised under local anesthesia. The histologic diagnosis was angiokeratoma. A case of a solitary angiokeratoma of the tongue is reported. We report here the third intra-oral case and the second case in the tongue with solitary angiokeratoma. (+info)
Solitary angiokeratoma of the tonsillar pillar of the oral cavity.
Solitary angiokeratoma has rarely been described in oral mucosa, mainly in the tongue, where the main concern is either aesthetical or due to bleeding problems. We present a case of solitary angiokeratoma of the tonsillar pillar in a 68-year-old man. Histologically, the morphology was typical of angiokeratoma. It showed an immunohistochemical pattern in consonance with a blood vessel origin, with expression of CD31, CD34, and von Willebrand factor. The lesion did not express D2-40. No other malformation or metabolic disorder was found in the patient. The lesion was surgically removed and due to the disproportionate post-surgery bleeding, the patient was studied by the Hematology Service, and she was diagnosed as an inhibitor of Factor VIII carrier. (+info)
Case study: the surgical management of angiokeratoma resulting from radiotherapy for penile cancer.