Hypertrophy of the branchial muscles. A case with unusual features.

Lambert, Colin D.; Young, J R

doi:10.1136/jnnp.39.8.810

Cited by 12 publications

(6 citation statements)

References 33 publications

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“…At variance with the findings by Harriman, according to which the mean fiber diameter of type 1 fibers in their index case of RMMH was 39 lm [3], the median diameter of type 1 fibers in the present case was 59.0 lm. Interestingly, the latter is similar to the median diameter of 57 lm in type 1 fibers, described by Lambert and colleagues in masticatory muscle myopathy (hypertrophic branchial myopathy) [14]. Masticatory muscles in humans have a somewhat different fiber type composition as compared to trunk or limb muscles [16,17].…”

Section: Discussionsupporting

confidence: 76%

“…Predominance of' hypertrophied type 1 fibers has also been described in masticatory muscle myopathy (hypertrophic branchial myopathy) [3,14,15]. However, no overt myopathic changes were detected in the case presented.…”

Section: Discussionmentioning

confidence: 59%

“…It is noteworthy that the only symptomatic pain relief in this patient was achieved after treatment with injections of C. Masticatory muscle myopathy (hypertrophic branchial myopathy) [3,7,14,15] D. Vascular malformation-intramuscular cavernous hemangioma [3,8] E. Inflammatory processes Focal myositis [1] Eosinophilic fasciitis [9] Ascending (necrotizing) fasciitis secondary to odontogenic infections [10] Idiopathic inflammatory myopathy [3] Infective causes-submasseteric abscess (severe pain and trismus) [3] F. Neoplastic processes Benign Lipoma [4,5] Malignant Intramuscular lymphoma [2] Leukemic infiltration/granulocytic sarcoma [11] Primary soft tissue sarcomas (liposarcoma and rhabdomyosarcoma) [4,5] Metastatic tumors (carcinoma [12], melanoma [13], and sarcoma) Fig. 9 Fiber diameter as a function of the distance from the regression line, shown in Fig.…”

Section: Clinicopathologic Correlationsmentioning

confidence: 91%

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Painful Unilateral Temporalis Muscle Enlargement: Reactive Masticatory Muscle Hypertrophy

Katsetos

Bianchi

Jaffery

et al. 2013

Head and Neck Pathol

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An instance of isolated unilateral temporalis muscle hypertrophy (reactive masticatory muscle hypertrophy with fiber type 1 predominance) confirmed by muscle biopsy with histochemical fiber typing and image analysis in a 62 year-old man is reported. The patient presented with bruxism and a painful swelling of the temple. Absence of asymmetry or other abnormalities of the craniofacial skeleton was confirmed by magnetic resonance imaging and cephalometric analyses. The patient achieved symptomatic improvement only after undergoing botulinum toxin injections. Muscle biopsy is key in the diagnosis of reactive masticatory muscle hypertrophy and its distinction from masticatory muscle myopathy (hypertrophic branchial myopathy) and other non-reactive causes of painful asymmetric temporalis muscle enlargement.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 59%

Section: Clinicopathologic Correlationsmentioning

confidence: 91%

See 1 more Smart Citation

Painful Unilateral Temporalis Muscle Enlargement: Reactive Masticatory Muscle Hypertrophy

Katsetos

Bianchi

Jaffery

et al. 2013

Head and Neck Pathol

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“…In histochemical preparations scattered fibers appeared slightly smaller than nor¬ mal. Both types 1 bodies or infectious agents, such as viral particles, were seen. The blood vessels were ultrastructurally unre¬ markable.…”

Section: Pathologic Findingsmentioning

confidence: 99%

Polymyositis Beginning as a Focal Process

Heffner¹,

Barron²

1981

Archives of Neurology

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“…The involved muscles, which are variably enlarged and can be up to three times the normal size, are otherwise normal on all imaging studies 2. Several case reports on combined hypertrophy of temporalis and masseter muscles were published3–5 but concurrent occurrence of hypertrophy of masseter and medial pterygoid muscles is very rare.…”

Section: Introductionmentioning

confidence: 99%

Masseter and medial pterygoid muscle hypertrophy

Guruprasad

Rishi²,

Nair³

et al. 2011

Case Reports

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Hypertrophy refers to an enlargement caused by an increase in the size but not in the number of cells. Generalised masticatory muscle hypertrophy may affect the temporalis muscle, masseters and medial pterygoids in a variety of combinations. Masseteric hypertrophy may present as either unilateral or bilateral painless swelling of unknown origin in the region of angle of mandible. It is a relatively rare condition and presents a diagnostic dilemma. While the history and clinical examination are important in differentiating this benign condition from parotid or dental pathology, they cannot necessarily exclude rare malignant lesion within the muscle. Advanced imaging modalities like CT and MRI are essential to confirm the diagnosis. Here the authors are reporting a unique case of masseter muscle hypertrophy along with medial pterygoid hypertrophy which was missed clinically but confirmed using CT and MRI.

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Hypertrophy of the branchial muscles. A case with unusual features.

Cited by 12 publications

References 33 publications

Painful Unilateral Temporalis Muscle Enlargement: Reactive Masticatory Muscle Hypertrophy

Painful Unilateral Temporalis Muscle Enlargement: Reactive Masticatory Muscle Hypertrophy

Polymyositis Beginning as a Focal Process

Masseter and medial pterygoid muscle hypertrophy

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