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Cutaneous sebaceous tumours and Lynch syndrome: long-term follow-up of 60 patients.
Clinical and Experimental Dermatology 2018 November 15
BACKGROUND: Sebaceous neoplasms (SN) may appear sporadically in the general population but may also be part of the Muir-Torre variant of Lynch syndrome (MT-LS). There are few studies in southern Europe on the incidence of MT-LS in the population of patients with SN.
AIM: To retrospectively review patients with SN and to analyse their clinical features and the incidence of MT-LS.
METHODS: Patients with SN diagnosed between 1995 and 2015 were enrolled in the study. The diagnosis of MT-LS was made according to established clinical criteria and, whenever possible, was confirmed by germline mutation analysis.
RESULTS: In 60 patients (32 men, 28 women, mean age 69.22 years), 96 SN were diagnosed: 65 adenomas (67.7%), 16 sebaceomas (16.7%) and 15 carcinomas (15.6%). Of the 60 patients, 50 (83.3%) had a single SN and 10 (16.7%) had multiple lesions. Patients diagnosed with MT-LS (12 patients, 20%) were younger (63.25 years vs. 70.71 years), and had a higher incidence of extrafacial SN (4/12 patients, 33.3%), and were significantly (P < 0.001) more likely to have multiple SNs (8/12, 75%) and keratoacanthomas (KAs) (6/12, 50%).
CONCLUSION: Our study confirms that all patients with SN should be investigated, as 20% of our patients were diagnosed with MT-LS. The most specific features of SN associated with MT-LS in our study were the presence of multiple lesions and association with KAs.
AIM: To retrospectively review patients with SN and to analyse their clinical features and the incidence of MT-LS.
METHODS: Patients with SN diagnosed between 1995 and 2015 were enrolled in the study. The diagnosis of MT-LS was made according to established clinical criteria and, whenever possible, was confirmed by germline mutation analysis.
RESULTS: In 60 patients (32 men, 28 women, mean age 69.22 years), 96 SN were diagnosed: 65 adenomas (67.7%), 16 sebaceomas (16.7%) and 15 carcinomas (15.6%). Of the 60 patients, 50 (83.3%) had a single SN and 10 (16.7%) had multiple lesions. Patients diagnosed with MT-LS (12 patients, 20%) were younger (63.25 years vs. 70.71 years), and had a higher incidence of extrafacial SN (4/12 patients, 33.3%), and were significantly (P < 0.001) more likely to have multiple SNs (8/12, 75%) and keratoacanthomas (KAs) (6/12, 50%).
CONCLUSION: Our study confirms that all patients with SN should be investigated, as 20% of our patients were diagnosed with MT-LS. The most specific features of SN associated with MT-LS in our study were the presence of multiple lesions and association with KAs.
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