Anastomosing hemangioma of the kidney

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Anastomosing hemangioma a rare benign vascular tumour that is typically found in the kidney and may mimic angiosarcoma.[1]

Anastomosing hemangioma of the kidney
Diagnosis in short

General

Gross

Features:

  • Mahogany/brown - centered on medulla of kidney.[2]

Microscopic

Features:

  • Vascular tumour characterized by vessels that fuse/join (anastomose) - also described as splenic sinusoids-like.[2]
  • +/-Extramedullary hematopoiesis.
    • Nucleated red blood cells.
    • Megakaryocytes.

Note:

  • Tumour may extend into surrounding adipose tissue.

DDx:

IHC

Features:[2]

  • CD31 +ve.
  • CD34 +ve.
  • HHV8 -ve.

See also

References

  1. Montgomery, E.; Epstein, JI. (Sep 2009). "Anastomosing hemangioma of the genitourinary tract: a lesion mimicking angiosarcoma.". Am J Surg Pathol 33 (9): 1364-9. doi:10.1097/PAS.0b013e3181ad30a7. PMID 19606014.
  2. 2.0 2.1 2.2 2.3 Kuroda, N.; Ohe, C.; Deepika, S.; Yorita, K.; Mikami, S.; Furuya, M.; Nagashima, Y.; Hes, O. et al. (Jun 2016). "Review of renal anastomosing hemangioma with focus on clinical and pathological aspects.". Pol J Pathol 67 (2): 97-101. PMID 27543862.