"畸形地伸长的" can be translated into English as "abnormally elongated" or "deformedly elongated", depending on the context and desired emphasis.
"Abnormally elongated" is more commonly used, emphasizing that the elongation is unusual or not in the normal range.
"Deformedly elongated" places more emphasis on the deformity or irregularity in the elongation process.
In most cases, "abnormally elongated" would be the more appropriate and natural-sounding choice.