In considering the painful subcutaneous and subungual tumors of the extremities one must keep in mind the glomus tumor, which is homologous to the glomus coccygeum of Luska. Because of its resemblance to hemangioma, angiosarcoma and neurofibroma many of these tumors have in all probability escaped recognition.
Masson in 1924 described a vascular tumor made up of a tangled mass of arterioles the walls of which had epithelioid and smooth muscle cells peculiarly arranged about the lumen. He further noted within the tumor large numbers of unmyelinated nerves which were directly continuous with the cytoplasm of the epithelioid cells. To this structure he gave the name "neuromyo-arterial glomus." Four years later Grieg1 reported three cases and reviewed twenty-three from the English and Scottish literature. Since then Stratmann,2 Mason and Weil,3 Bailey,4 Stout5 and Kufler6 have thoroughly described the condition. Stout in 1935 reported eleven
SLEPYAN AH. THE GLOMUS TUMOR: REPORT OF TWO CASES WITH HISTOLOGIC OBSERVATIONS. Arch Derm Syphilol. 1937;36(1):77–84. doi:https://doi.org/10.1001/archderm.1937.01480010081014
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