Fusiform enlargement of the nasolacrimal canal a rare anatomic variation

@article{Siricki2001FusiformEO,
  title={Fusiform enlargement of the nasolacrimal canal a rare anatomic variation},
  author={A. Siricki and Yıldırım Ahmet Bayazıt and Meral Torun Bayram and Serhat Inaloz},
  journal={Surgical and Radiologic Anatomy},
  year={2001},
  volume={23},
  pages={163-167}
}
To determine the standard width and shape of the nasolacrimal canal (NLC) in the coronal plane, a retrospective review of 950 coronal paranasal CT sections was undertaken. The coronal diameter of NLC was measured at its upper and lower ends and anomalies in its configuration noted. The mean diameters of the NLC were 4.8 ± 1.2 mm and 4.7 ± 1.1 mm on the right and left sides, respectively. There was no difference in the mean NLC diameter between the right and left sides, upper and lower portions… 
Giant dacryocystomucopyocele in an adult: a review of lacrimal sac enlargements with clinical and histopathologic differential diagnoses.
TLDR
A 95-year-old woman with an acquired, enormous dacryocystomucopyocele is described, larger than any previously reported, that developed over 25 years and produced globe displacement with an associated conspicuous enlargement of the nasolacrimal duct.
Massive Enlargement of the Nasolacrimal Canal Causing Epiphora and Chronic Maxillary Sinusitis
TLDR
This is the first report of a massively dilated NLC causing epiphora and chronic sinusitis, and is believed to be a rare anatomic variant.

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