If there are classic palpable purpura or inflammatory retiform
palpable lesions in a dependent distribution, the patient's lesions are probably due to an immune complex vasculitis.
Cocaine-associated retiform purpura: a C5b-9mediated microangiopathy syndrome associated with enhanced apoptosis and high levels of intercellular adhesion molecule-1 expression.
Retiform and stellate purpura with and without central necrosis is typically seen grossly.
Retiform hemangioendothelioma is a rare variant of low-grade angiosarcoma with an indolent clinical behaviour (3,4,5) with predilection for young adults.
Differential diagnosis of retiform haemangioendothelioma:
The lesions demonstrated an irregular rete ridge system, with nests and single melanocytes irregularly distributed within the retiform
Extraneural retiform perineuriomas: a report of four cases.
A benign neoplasm with histopathological features of both schwannoma and retiform perineurioma (benign schwannoma-perineurioma): a report of six cases of a distinctive soft tissue tumor with a predilection for the fingers.
Pathologic Diagnosis: Sertoli-Leydig Cell Tumor, Retiform Type
3) The well-differentiated tumors generally occur in older patients, whereas tumors with a retiform pattern are mostly seen in younger patients in their first or second decade.
19] Wolffian adnexal tumors, so-called female adnexal tumor of probable wolffian origin, also show varying morphologic structures with solid (spindle cells), tubular (lined by columnar cells), retiform
, and multicystic (spaces lined by cuboidal and attenuated cells) patterns.