ABSTRACT BACKGROUND: Managing cervical intraepithelial neoplasia grade 2 (CIN2) is challenging, considering the CIN2 regression rate, perinatal risks associated with excisional procedures, and insufficient well-established risk factors to predict progression. OBJECTIVES: To determine the ability of p16INK4a and Ki-67 staining in biopsies diagnosed with CIN2 to identify patients with higher-grade lesions (CIN3 or carcinoma). DESIGN AND SETTING: Cross-sectional study conducted at a referral center for treating uterine cervical lesions. METHODS: In 79 women, we analyzed the correlation of p16INK4a and Ki-67 expression in CIN2 biopsies with the presence of a higher-grade lesions, as determined via histopathology in surgical specimens from treated women or via two colposcopies and two cytological tests during follow-up for untreated women with at least a 6-month interval. The expression of these two biomarkers was verified by at least two independent pathologists and quantified using digital algorithms. RESULTS: Thirteen (16.8%) women with CIN2 biopsy exhibited higher-grade lesions on the surgical excision specimen or during follow-up. p16INK4a expression positively and negatively predicted the presence of higher-grade lesions in 17.19% and 86.67% patients, respectively. Ki-67 expression positively and negatively predicted the presence of higher-grade lesions in 40% and 88.24% patients, respectively. CONCLUSIONS: Negative p16INK4a and Ki67 immunohistochemical staining can assure absence of a higher-grade lesion in more than 85% of patients with CIN2 biopsies and can be used to prevent overtreatment of these patients. Positive IHC staining for p16INK4a and Ki-67 did not predict CIN3 in patients with CIN2 biopsies.

Sirenomelia é um defeito congênito muito raro do campo primário do desenvolvimento, definido pela substituição dos membros inferiores, normalmente pareados por um único membro mediano. Geralmente, associa-se a graus variados de anomalias gênito-urinárias. Relatamos três casos necropsiados dessa entidade, incluindo estudo radiológico do membro inferior único, associados a agenesia renal bilateral, de ureteres e da bexiga, atresia retal, ânus imperfurado, testículos abdominais e ausência de genitália externa, além de outros defeitos congênitos infrequentemente observados, que somente puderam ter seus diagnósticos firmados por meio da necropsia.

Sirenomelia, an extremely rare congenital defect, is defined as a limb abnormality in which the normally paired lower limbs are replaced by a single midline limb. It is commonly associated with varied genitourinary anomalies. We report three cases of sirenomelia including x-ray documentation of the lower limb. Other associated aspects, whose diagnoses were established exclusively through autopsy, included bilateral renal, ureteral and bladder agenesis, rectal atresia, imperforate anus, intra-abdominal testis, absence of external genitalia and other rare congenital abnormalities.