Cylindroma is a rare cutaneous affliction. In the most comprehensive article on the subject written in 1933, Ronchese stated that "up to 1932, only 31 fully developed cases were reported. Of these, 19 occurred in females and 12 in males." Since 1933, several other cases have been reported, some of which will be cited later. However, it is doubtful whether more than 50 cases have been reported in all medical literature. Without doubt some cases have been seen which have not been reported.
The lesions of cylindroma usually occur on the scalp in the form of pink or bluish mushroom-like or pedunculated or tabulated tumors, varying in size from that of a pea to that of an apple. Occasionally they are found on the extremities and trunk; there they lose their pedunculated character and appear to be embedded in the subcutis. They may be of different consistency and feel firm
COOPER DL. CYLINDROMA: Report of on Unusually Extensive Case. JAMA. 1946;132(10):575–577. doi:10.1001/jama.1946.02870450029007b
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