The subtype 4A is a complete longitudinal vertical tear of the red-red zone of the meniscus, The subtype 4B involves a complete tear of the junction itself where the meniscocapsular and meniscotibial fibers attach to the posterior horn. A very peripheral meniscal tear(ramp type 4A lesion) can mimic ramp type 4B lesion. (Type 4B ramp lesion) There are edema and irregularity of the meniscocapsular..