In addition, cryoglobulinemia can induce a thrombotic vasculopathy, and the first clinical lesion is usually a stellar or retiform purpura, which evolves into necrosis.

(54) Morphologically, mesonephric carcinoma is characterized by heterogeneous architecture, with various patterns of growth that include glandular/tubular, papillary, retiform , sex cord-like, solid, and spindled/sarcomatoid (Figure 6, A and B).

Histological analysis, Figures 3 and 4, indicated a predominantly poorly differentiated Sertoli-Leydig cell tumour, retiform pattern, with heterologous mucinous elements.

Here, we report a case of a Sertoli-Leydig cell tumor with both heterologous and retiform elements in which only heterologous components were sampled during intraoperative consultation.

The patient was given a diagnosis of levamisole-induced cutaneous vasculopathy based on her history of cocaine use; the typical, painful palpable purpura with angulated borders and a necrotic center ( retiform purpura); and positive immunologic markers.

More recently, heterologous and retiform differentiation has been described.

There are five histological subtypes of SLCT as follows: well differentiated, intermediate differentiation, poorly differentiated, retiform , and heterologous or mixed [3-5].

The pituitary gland and its stalk attached to the 3rd ventricle floor were described; like Herophilus, he wrongly placed a retiform plexus at the base of the human brain.

Its appearance was that of an accumulation of particles resembling white sand surrounded by a network of thin bones ( retiform bony trabeculae).