title: Perianal nodular hidradenocarcinoma. Case report.
abstract: BACKGROUND
  Eccrine glands (sweat glands) appear in all sites of the skin and are more abundant in hands and feet. Nodular hidradenocarcinoma (NH) is a rare malignant and aggressive tumor of the eccrine glands. The objective of this study is to report a case of perianal hidradenocarcinoma.
  
  
  METHODS
  We present the case of a 75-year-old female with diabetes, hypertension, and hypothyroidism. Physical examination revealed a small perianal tumor that was palpated near the anal canal. Biopsy was done. Pathology report revealed perianal hidradenoma. Rectosigmoidoscopy was normal. Computed tomography showed 1-cm adenopathies in inguinal and right iliac regions. Extensive resection of the tumor was done. Definitive pathology report was malignant eccrine acrospiroma. The patient underwent adjuvant chemotherapy in the Oncology Service and died 1 month later.
  
  
  CONCLUSIONS
  In patients with a first symptom of metastases in the inguinal region, suspicion must be directed to the anal canal.
authors.affiliation: Servicio de Coloproctología, Hospital Alcivar, Guayaquil, Ecuador. gesierra21@yahoo.com
authors.forename: Ernesto
authors.initials: E
authors.lastname: Sierra Montenegro
authors.forename: Gastón
authors.initials: G
authors.lastname: Sierra Luzuriaga
authors.forename: Gaetano
authors.initials: G
authors.lastname: Leone Stay
authors.forename: Vilma
authors.initials: V
authors.lastname: Salazar Menéndez
authors.forename: Carlos
authors.initials: C
authors.lastname: Quiñonez Auria
mesh_terms: D000368:Aged; D001003:Anal Canal; D004439:Eccrine Glands; D005260:Female; D006801:Humans; D013544:Sweat Gland Neoplasms / Q000473:pathology / Q000601:surgery