Spherophakia, Isolated Clinical CharacteristicsOcular Features: Small, spherical lenses are characteristic of this entity. Lenticular myopia is usually present but no increased axial length. Glaucoma has been reported in several individuals and speculated to be due to pupillary block. No buphthalmos or angle anomalies were present. The lens may sublux into the vitreous cavity. Systemic Features: No skeletal, cardiovascular or metabolic disease is present. GeneticsIsolated spherophakia is an autosomal recessive disorder resulting from homozygous mutations in LTBP2 (13q24.1-q32.12). Parental consanguinity was present in reported families. Spherophakia is a clinically and genetically heterogeneous disorder and usually found in association with systemic findings. It is commonly seen in the Weill-Marchesani syndrome 1 (277600), in Weill Marchesani syndrome 2 (608328), in the Weill-Marchesani-Like syndrome (613195), in a condition known as ‘megalocornea, ectopia lentis, and spherophakia’ (?), another one called 'spherophakia and hernia' (157150), sulfite oxidase deficiency (272300), primary congenital glaucoma D (613086) and in a syndrome known as ‘spherophakia and metaphyseal dysplasia’ (157151). Pedigree: Autosomal recessiveTreatmentTreatment Options: The lenses may require extraction for secondary glaucoma and/or visual rehabilitation. ReferencesArticle Title: A homozygous mutation in LTBP2 causes isolated microspherophakia Kumar A, Duvvari MR, Prabhakaran VC, Shetty JS, Murthy GJ, Blanton SH. A homozygous mutation in LTBP2 causes isolated microspherophakia. Hum Genet. 2010 Oct;128(4):365-71. PubMed ID: 20617341 Clinical and genetic investigation of isolated microspherophakia in a consanguineous Tunisian family Ben Yahia S, Ouechtati F, Jelliti B, Nouira S, Chakroun S, Abdelhak S, Khairallah M. Clinical and genetic investigation of isolated microspherophakia in a consanguineous Tunisian family. J Hum Genet. 2009 Sep;54(9):550-3. PubMed ID: 19696795 Read more about Spherophakia, Isolated
A homozygous mutation in LTBP2 causes isolated microspherophakia Kumar A, Duvvari MR, Prabhakaran VC, Shetty JS, Murthy GJ, Blanton SH. A homozygous mutation in LTBP2 causes isolated microspherophakia. Hum Genet. 2010 Oct;128(4):365-71. PubMed ID: 20617341
Clinical and genetic investigation of isolated microspherophakia in a consanguineous Tunisian family Ben Yahia S, Ouechtati F, Jelliti B, Nouira S, Chakroun S, Abdelhak S, Khairallah M. Clinical and genetic investigation of isolated microspherophakia in a consanguineous Tunisian family. J Hum Genet. 2009 Sep;54(9):550-3. PubMed ID: 19696795