- Canaliculops (or canaliculocele) is an ectasia of the canalicular wall, mostly idiopathic in origin. However, the role of trauma and inflammation as the initial insult to canalicular system has been suggested by some authors.1 Being a rare condition, most ophthalmologists are unfamiliar with the condition with consequent high likelihood of misdiagnosis or sometimes overdiagnosis.2
- A malignant rhabdoid tumor (MRT) is a highly aggressive tumour of the kidney. Extra renal MRTs have also been described as cytologically resembling renal rhabdoid tumours and are known to be highly lethal with a poor prognosis. Orbital presentation of MRT was first reported by Rootman et al. in 1989.1 Since then, a few MRTs of the orbit have been reported in infants, but none as a primary intraocular MRT presenting as an orbital mass in adolescents.
- Pleomorphic adenoma is the most common benign epithelial tumour of the lacrimal gland. It is composed of both epithelial and mesenchymal elements; the latter mainly consists of myxoid stroma. Typically, on imaging, it presents as a well-defined, solid mass in lacrimal gland fossa with bony remodeling. Internal architecture of the tumour may be heterogeneous as the myxoid stroma within the tumour can be seen as hypodense areas. Presence of cystic spaces within pleomorphic adenoma of the lacrimal gland is extremely rare and can lead to misdiagnosis.
- Pilomatrixoma is a benign skin neoplasm arising from the matrix cells at the base of hair. It was originally described as calcified epithelioma of sebaceous glands, but later the term pilomatrixoma was suggested to denote its origin.1 There are limited reports in the literature on eyelid pilomatrixomas. Most of them involve eyebrows and are seen as subcutaneous, painless nodules. The unusual clinical presentation of this tumour as a chalazion in the current case makes it worth reporting.