Erythema nodosum

Case 386  Dec 2011 (P. McKee)  F 46 (*teaching)  

Predominantly septal with granulomata, which may be conspicuous in later stages. 

Case 854   25.9.13  (H. Diwan)  F 65 thigh 

Septal panniculitis with Meischer granulomata.  Described late 1940’s – radially arranged histiocytes around a central cleft.  This example is not typical.  Much more common (about 70%) in EN than other forms of panniculitis. 

Case 1582   19.7.16 (U. Sundram)  M 70 posterior calf lesion 

Lobular panniculitis with granulomata and giant cells.  Thickened fibrous septae.  Opinion divided on whether this was Lipomembranous or showed Miescher’s granulomata.  EN histology can be very varied. 

Case 1691  21.11.16 (R. Carr) no clin details (*teaching)  

Septal panniculitis.  Meischer’s radial granuloma. 

Case 2910  1.9.21 (U. Sundram)  M 70 recurrent groin lesion 

Septal and intralobular panniculitis.  Some thought Meischer’s granulomata present, but not very convincing.  Anatomical site very odd too.  No evidence of IBD or α-1 anti-trypsin deficiency.