Partial CPT was defined as "lacking substantial shared dural venous sinuses", whereas total CPT "share a large portion of their dural venous sinuses and present with pronounced brain compression, which leads to distortion within the cranium". Total
Total craniopagus twins share a large portion of dural venous sinuses and present with pronounced brain compression, leading to distortion within the cranium. Stone and Goodrich also defined two main subtypes, based on whether the long-axis angle between the twins was angular or vertical. The angular subtype has a higher rate of comorbidities than the vertical subtype.Vertical craniopagus calvaria is continuous and is further subdivided on the basis of intertwin axial facial rotation:

Type 1: both children face in the same general directional axis so that the angle between twins is less than 40 degrees. These twins show relatively symmetric superior bi-parietal or vertex compressional flattening. Type 2: both children face opposite directions so that the deformity shows an axial rotation between 140 and 180 degrees.
Kalia died on 25 November 2020 from cardiac arrest while Jaga continues to live. Rabeya and Rukaya Islam, born in Pabna, Bangladesh in July 2016, were successfully separated after a 33-hour surgery in Dhaka, Bangladesh, by a medical team from a Hungarian nonprofit called the Action for Defenseless People Foundation led by renowned neurosurgeon András Csókay. Two unnamed year-old twins conjoined at the back of their heads were separated successfully in a surgery performed by Dr. Mickey Gideon at the Soroka Medical Center in Beersheba, Israel, in September 2021. Bernado and Arthur Lima, three-year-old twins from Roraima, Brazil, were separated by a team led by Owase Jeelani in a Rio de Janeiro hospital. Seven surgeries were needed, the last of which alone took 27 hours. The operation was particularly notable in that Jeelani received assistance from Great Ormond Street Hospital in London via the use of virtual reality, as well as the twins being the oldest craniopagus twins to be separated. Tatiana and Krista
Throughout history, the fascination about craniopagus twins has continually increased as neurobiology and the field of neuroscience has become more interesting to the public. In 2011, The New York Times Magazine covered a story of two craniopagus twin girls who share a brain and seem to show all different kinds of physiological and emotional responses due to their condition. Though Krista and Tatiana Hogan share a brain, the two girls showed distinct personalities and behavior. One example was when Krista started drinking her juice Tatiana felt it physically going through her body.