renal glomus tumor
Glomus tumors closely resemble the normal glomus body and have a predilection for skin and subcutaneous tissue. These tumors rarely present in visceral organs, including the kidneys.
References
Infiltrating glomus tumor of uncertain malignant potential arising in the kidney.
Gill J, Van Vliet C. Hum Pathol. 2009 Nov 5. PMID: #19896698#