Acquired Focal Choroidal Excavation Secondary to Pachychoroid Choroidal Neovascular Membrane After Central Serous Chorioretinopathy.

To report a case of acquired conforming-type focal choroidal excavation (FCE) secondary to a pachychoroid choroidal neovascular membrane (CNVM) triggered by central serous chorioretinopathy (CSCR). A case and its findings were analyzed. A 54-year-old Asian man who had spontaneous resolution of CSCR in the right eye presented with a pachychoroid CNVM and FCE 1 year after the initial CSCR diagnosis. Intravitreal antivascular endothelial growth factor injections were initiated, and the subretinal fluid and intraretinal hemorrhage resolved. The patient was followed for FCE progression for 3 years. Acquired FCE can occur secondary to CSCR and pachychoroid CNVM. The pathogenesis may be focal choroidal ischemia, choroidal vascular collapse, and fibrosis leading to choroidal excavation. This case highlights the progression of the spectrum of pachychoroid disorders from CSCR, pachychoroid CNVM, and subsequent acquired confirming-type FCE. Further research is needed to assess other diseases leading to acquired FCE and to determine the underlying mechanism.