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Difference between revisions of "Case 117"
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→Diagnosis: note about p16
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This smooth muscle tumor shows markedly atypical nuclei, some of which are multinucleate. The nuclei are smudgy and hyperchromatic, raising concern. However, here is no increase in mitotic activity; necrosis is absent. The edge of the tumor is rounded and there is no invasion of surrounding myometrium. These lesions are benign.<ref>{{Cite journal | last1 = Ly | first1 = A. | last2 = Mills | first2 = AM. | last3 = McKenney | first3 = JK. | last4 = Balzer | first4 = BL. | last5 = Kempson | first5 = RL. | last6 = Hendrickson | first6 = MR. | last7 = Longacre | first7 = TA. | title = Atypical leiomyomas of the uterus: a clinicopathologic study of 51 cases. | journal = Am J Surg Pathol | volume = 37 | issue = 5 | pages = 643-9 | month = May | year = 2013 | doi = 10.1097/PAS.0b013e3182893f36 | PMID = 23552381 }}</ref><ref>{{Cite journal | last1 = Croce | first1 = S. | last2 = Young | first2 = RH. | last3 = Oliva | first3 = E. | title = Uterine leiomyomas with bizarre nuclei: a clinicopathologic study of 59 cases. | journal = Am J Surg Pathol | volume = 38 | issue = 10 | pages = 1330-9 | month = Oct | year = 2014 | doi = 10.1097/PAS.0000000000000249 | PMID = 25140893 }}</ref> | This smooth muscle tumor shows markedly atypical nuclei, some of which are multinucleate. The nuclei are smudgy and hyperchromatic, raising concern. However, here is no increase in mitotic activity; necrosis is absent. The edge of the tumor is rounded and there is no invasion of surrounding myometrium. These lesions are benign.<ref>{{Cite journal | last1 = Ly | first1 = A. | last2 = Mills | first2 = AM. | last3 = McKenney | first3 = JK. | last4 = Balzer | first4 = BL. | last5 = Kempson | first5 = RL. | last6 = Hendrickson | first6 = MR. | last7 = Longacre | first7 = TA. | title = Atypical leiomyomas of the uterus: a clinicopathologic study of 51 cases. | journal = Am J Surg Pathol | volume = 37 | issue = 5 | pages = 643-9 | month = May | year = 2013 | doi = 10.1097/PAS.0b013e3182893f36 | PMID = 23552381 }}</ref><ref>{{Cite journal | last1 = Croce | first1 = S. | last2 = Young | first2 = RH. | last3 = Oliva | first3 = E. | title = Uterine leiomyomas with bizarre nuclei: a clinicopathologic study of 59 cases. | journal = Am J Surg Pathol | volume = 38 | issue = 10 | pages = 1330-9 | month = Oct | year = 2014 | doi = 10.1097/PAS.0000000000000249 | PMID = 25140893 }}</ref> | ||
[[p16]] immunostaining may be useful for differentiating leiomyoma (weak) from [[uterine leiomyosarcoma|leiomyosarcoma]] (strong).<ref name=pmid18156978>{{Cite journal | last1 = Gannon | first1 = BR. | last2 = Manduch | first2 = M. | last3 = Childs | first3 = TJ. | title = Differential Immunoreactivity of p16 in leiomyosarcomas and leiomyoma variants. | journal = Int J Gynecol Pathol | volume = 27 | issue = 1 | pages = 68-73 | month = Jan | year = 2008 | doi = 10.1097/pgp.0b013e3180ca954f | PMID = 18156978 }}</ref> | |||
===References=== | ===References=== | ||
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