Introduction
Asymmetry is one of the most unusual and interesting errors of human reproduction. Subtle, asymmetric variation of the contra lateral structures of the head and face occur commonly in the general population in the absence of any local lesion or condition. [1] Some of these changes, however, may slowly but steadily progress and exhibit asymmetrical development. These changes usually do not follow any particular relationship with time or modifying circumstances such as trauma and often have been termed hemihypertrophy, congenital hemihypertrophy, hemimacrosomia, or partial gigantism. This phenomenon was first described by Meckel in 1822 [2] and reported first by Wagner in1839. [3] Hemihypertrophy or hemihyperplasia has rarely been reported and is most often described in literature as hemi hypertrophy rather than …show more content…
It may involve an entire side or an isolated part on one side of the body. Usually this condition involves all of the organ systems of the affected side or body part or may be limited to a specific organ, or may involve just the musculature when it is referred to as myohyperplasia. Rowe [4] in 1962 classified hemi hypertrophy into 1) Complex hemihypertrophy, involving the entire half of the body 2) simple hemi hypertrophy, affecting 1 or both limbs 3) hemi facial hypertrophy (HFH). HFH is further divided in to: a. True hemi facial hypertrophy (THFH), exhibiting unilateral enlargement of the viscerocranium, bounded superiorly by the frontal bone (not including the eye), inferiorly by the inferior border of the mandible, medially by the midline, and laterally by the ear, including the pinna with enlargement of all tissues, teeth, bones and soft tissue in this area. b. Partial hemi facial hypertrophy (PHFH) if not all structures are enlarged to the same degree or are limited to
Asymmetry is one of the most unusual and interesting errors of human reproduction. Subtle, asymmetric variation of the contra lateral structures of the head and face occur commonly in the general population in the absence of any local lesion or condition. [1] Some of these changes, however, may slowly but steadily progress and exhibit asymmetrical development. These changes usually do not follow any particular relationship with time or modifying circumstances such as trauma and often have been termed hemihypertrophy, congenital hemihypertrophy, hemimacrosomia, or partial gigantism. This phenomenon was first described by Meckel in 1822 [2] and reported first by Wagner in1839. [3] Hemihypertrophy or hemihyperplasia has rarely been reported and is most often described in literature as hemi hypertrophy rather than …show more content…
It may involve an entire side or an isolated part on one side of the body. Usually this condition involves all of the organ systems of the affected side or body part or may be limited to a specific organ, or may involve just the musculature when it is referred to as myohyperplasia. Rowe [4] in 1962 classified hemi hypertrophy into 1) Complex hemihypertrophy, involving the entire half of the body 2) simple hemi hypertrophy, affecting 1 or both limbs 3) hemi facial hypertrophy (HFH). HFH is further divided in to: a. True hemi facial hypertrophy (THFH), exhibiting unilateral enlargement of the viscerocranium, bounded superiorly by the frontal bone (not including the eye), inferiorly by the inferior border of the mandible, medially by the midline, and laterally by the ear, including the pinna with enlargement of all tissues, teeth, bones and soft tissue in this area. b. Partial hemi facial hypertrophy (PHFH) if not all structures are enlarged to the same degree or are limited to