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**Thick walled blood vessels with (plump) hobnail endothelial cells.<ref>URL: [http://emedicine.medscape.com/article/1098777-diagnosis http://emedicine.medscape.com/article/1098777-diagnosis]. Accessed on: 8 August 2010.</ref> | **Thick walled blood vessels with (plump) hobnail endothelial cells.<ref>URL: [http://emedicine.medscape.com/article/1098777-diagnosis http://emedicine.medscape.com/article/1098777-diagnosis]. Accessed on: 8 August 2010.</ref> | ||
*Eosinophils - abundant - '''key feature'''. | *Eosinophils - abundant - '''key feature'''. | ||
DDx: | |||
*Drug reaction. | |||
*Parasitic infection. | |||
Notes: | Notes: | ||
*In a lymph node... it may be signed-out as ''reactive lymphadenitis with follicular hyperplasia and prominent eosinophils, see comment.'' | |||
*Abundant eosinophils: consider [[Langerhans cell histiocytosis]]. | *Abundant eosinophils: consider [[Langerhans cell histiocytosis]]. | ||
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