Haemangioma, microvenular

Case 299   Aug 2011 (P. McKee)  M 8 erythematous lesion leg 

Diffuse capillary proliferation throughout dermis.  Invasion of erector pili muscles is characteristic 

Case 329   Sept 2011  (P. McKee)  M 38 erythematous lesion, arm 

Banal capillaries.  Smooth muscle infiltration was present but not illustrated. 

Case 396  Dec 2011 (P. Mckee)  F 30 haemangioma 

Florid example with most vessels cut at right angles.  Vessels infiltrating between hyalinised collagen (and also arrector pili mm. – not shown). 

DD: epithelioid haemangioendothelioma – this doesn’t show so much vascular differentiation.  Shows clusters of cells with intracytoplasmic vacuoles, and occ.  RBC’s.  Has myxoid and hyalinised stroma. 

Case 1133 27.10.14  (M. Hurt)  F 62 (black) red mark arm 

Non-inflammatory proliferation of small bvs.  Hobnail endothelium.  No haemosiderin. 

CD31 (endothelium) and SMA (pericytes) +ve; D2-40 –ve (not lymphatic). 

Rare, solitary acquired vascular malformation of young/middle aged adults, usually extremities. 

Case 2096 19.6.18 (U. Sundram0 M 50 chest 

Rather intertitial pattern of small vessel proliferation with ? mucin.  Final diagnosis not declared.  Could also have been Kaposi.