This paper introduces a new kind of local consistency based on the general idea of singleton arc consistency (SAC). This is a reduced form of SAC that only considers neighbourhoods of a variable with a singleton domain; hence, the name “neighbourhood SAC” (NSAC). Like AC and SAC, NSAC has a unique fixpoint, so that NSAC algorithms will produce the same result when applied to a problem regardles...

purpose: to report a case of lacrimal sac lymphoma presenting with nasolacrimal obstruction. patient and findings: a 35-year-old woman presented with epiphoria and swelling of the left lacrimal sac area and cervical lymphadenopathy. she had undergone dacryocystorhinostomy (dcr) 6 months before. computed tomography demonstrated a lacrimal sac mass involving the nasal cavity. histopathologic exam...

inguinal hernias sometimes surprise surgeons with unexpected contents. this article reports a 46-year-old male with a painless inguinal mass. surgical exploration showed three smooth yellowish concretions in the hernia sac. to our knowledge, this is the first report of hernial sac lithiasis.

This review highlights several important electrocatalytic reactions performed over single-atomic synergistic structures, including SAC-nanoparticles (SAC-NPs), SAC-clusters (SACCs), dual-atom sites (DACs), and alloys (SAAs).

in spite of being histologically benign, sacrococcygeal teratoma (sct) may recur either as a benign or malignant tumor. a total of 26 patients with benign neonatal scts were treated in taleghanee and mofid medical centers from 1986 to 2000. investigations included radiography,abdominal ultrasound and computed tomography (ct) scan and measurement of tumor marker (α-fetoprotein). initial surgical...

in a prospective survey, 200 cases of operated chronic dacryocystitis were divided into three groups according to the kind of operation, and the respective results are as follows: group i includes 100 cases in whom the lacrimal bone was removed (8mm x 8mm) and a 6mm diameter catheter was used (as a duct between the lacrimal sac and nasal cavity). the recurrence rate within one year was 24 % . g...