Diagnosis of asymmetry can be done through many different methods. PA cephalometry, panoramic radiograph, and nuclear imaging are some of the techniques that can be used for diagnosis. Primarily nuclear imaging techniques such as single-photon emission computed tomography (SPECT), positron emission tomography (PET), and bone scintigraphy are taken along with other data before a patient is diagnosed for<unk> . In SPECT imaging, an increase uptake of the isotope is seen on the affected in comparison to the non-affected side. A difference of at least 10% or a minimum ratio of 55% to 45% uptake of technetium-99m is seen when comparing affected vs non-affected side respectively. An uptake of more than 55% and difference of at least 10% indicates an active condylar growth. Classification Hugo Obwegesr and Makek classified<unk>  into three categories, listed in the table below. Type 1 develops its characteristics from the horizontal vector, and Type 2 develops its characteristics from the vertical vector. Type 1 CH occurs much more common (15x) than Type 2 CH. Wolford et al. in 2014, developed an updated classification of<unk> . In 1986, Slootweg & Muller devised a histopathological classification which allows the condylar tissues to be classified into specific categories. Type Name Clinical findings Histological findings Type 1 Hemimandibular elongation - Chin deviation towards contralateral side - Midline shift towards contralateral side - Posterior crossbite on contralateral side - Excessive growth in the horizontal vector - Enlarged ramus, normal condyle Type 2 Hemimandibular<unk>  - Sloping rima oris with minimal chin deviation - Supra-eruption of maxillary molars on affected side - Open bite - Midline shift (minimal to none) - Excessive growth in the vertical vector - Excessive growth in the condylar head Type 3 Combination of both - Chin deviation towards contralateral side - Possible open bite - Sloping rima oris with possible chin deviation - Combination of excessive growth in both vectors
Condylar hyperplasia
Condylar resorption
Condylar hypoplasia
Radial dysplasia
Habit-tic deformity
Tarsal coalition
Hypercementosis
Leri pleonosteosis