question: Which concept that was similar to  Type 2 Ho-I was developed in the late  1930s?
answer: Panzer IV
context: Title: Cortical dysplasia
  Passage: Focal cortical dysplasia (FCD) is a congenital abnormality of brain development where the neurons in an area of the brain failed to migrate in the proper formation in utero.  Focal cortical dysplasia is a common cause of intractable epilepsy in children and is a frequent cause of epilepsy in adults.  There are several subtypes of FCD including type 1a, 1b, 2a, 2b, 3a, 3b, and 3c, each with distinct histopathological features.  All forms of focal cortical dysplasia lead to disorganization of the normal structure of the cerebral cortex.  Type 1 FCD exhibits subtle alterations in cortical lamination.  Type 2a FCD exhibits neurons that are larger than normal that are called cytomegalic dysmorphic neurons (CDN).  FCD type 2b exhibits complete loss of laminar structure, and the presence of CDN and enlarged cells are called balloon cells (BC) for their large elliptical cell body shape, laterally displaced nucleus, and lack of dendrites or axons.  The developmental origin of balloon cells is currently believed to be derived from neuronal or glial progenitor cells.  Balloon cells are similar in structure to giant cells in the disorder tuberous sclerosis complex.
  Title: Panzer IV
  Passage: The "Panzerkampfwagen" IV (PzKpfw IV), commonly known as the Panzer IV, was a German medium tank developed in the late 1930s and used extensively during the Second World War.  Its ordnance inventory designation was Sd.Kfz.  161.
  Title: Type 2 Ho-I
  Passage: The Type 2 Gun tank Ho-I (二式砲戦車 ホイ , Ni-shiki hōsensha Ho-I ) Support Tank was a derivative of the Type 97 Chi-Ha medium tanks of the Imperial Japanese Army in World War II.  Similar in concept to early variant of the German Panzer IV, it was designed as a self-propelled howitzer to provide the close-in fire support for standard Japanese medium tanks with additional firepower against enemy anti-tank fortifications.
  Title: Nuocyte
  Passage: The nuocyte is a cell of the innate immune system that plays an important role in type 2 immune responses that are induced in response to helminth worm infection or in conditions such as asthma and atopic disease.  Nuocytes are amongst the first cells activated in type 2 immune responses and are thought to play important roles in activating and recruiting other cells types through their production of type 2 cytokines interleukin 4, 5 and 13.  Nuocytes have been observed to proliferate in the presence of IL-7 "in vitro".  Nuocytes contribute to the expulsion of helminth worms and to the pathology of colitis and allergic airways disease.
  Title: Hyper-IgM syndrome type 5
  Passage: The fifth type of hyper-IgM syndrome has been characterized in three patients from France and Japan.  The symptoms are similar to hyper IgM syndrome type 2, but the AICDA gene is intact.  These three patients instead had mutations in the catalytic domain of uracil-DNA glycosylase, an enzyme that removes uracil from DNA.  In both type 2 and type 5 hyper-IgM syndromes, the patients are profoundly deficient in IgG and IgA because the B cells can't carry out the recombination steps necessary to class-switch.
citations: Panzer IV Type 2 Ho-I