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Case report
Conjunctival stromal tumour (COST): anterior-segment OCT findings
  1. Joyeeta Das1,
  2. Samar K Basak2 and
  3. Nibedita Das2
  1. 1Oculoplasty, Disha Eye Hospitals, Kolkata, West Bengal, India
  2. 2Cornea and External Disease, Disha Eye Hospital, Kolkata, West Bengal, India
  1. Correspondence to Dr Samar K Basak; basak_sk{at}


Conjunctival stromal tumour (COST) is a recently described rare conjunctival tumour of mesenchymal origin with only four publications describing a handful of cases thus far. In this report, we describe the anterior-segment optical coherence tomography (AS-OCT) characteristics in a case of COST for the first time, in addition to the clinical and histopathological characteristics. The AS-OCT showed an elevated, dome-shaped hyporeflective homogenous lesion in the conjunctival stroma lined by hyperreflective outer layer with mild posterior shadowing, consistent with histological description of a paucicellular tumour with large myxoid collagenous material inside. Immunohistochemistry showed positive CD34 and vimentin but negative S100 and smooth muscle actin, thereby differentiating it from conjunctival myxoma.

  • eye
  • screening (oncology)
  • pathology

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  • Contributors JD: oculoplasty surgeon, treating physician and chief author. SKB: cornea surgeon, corresponding author, manuscript review. ND: cornea surgeon, manuscript preparation.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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