Isolated unilateral temporalis muscle hypertrophy

Abstract

<jats:p>Isolated unilateral temporalis muscle hypertrophy is an extremely rare cause of swelling in the temple region, with only 7 cases reported in the literature. The authors report the eighth case of this unique occurrence in a 17-year-old boy and review the current literature.</jats:p>

Painful Unilateral Temporalis Muscle Enlargement: Reactive Masticatory Muscle Hypertrophy

“…The most positive values likely correspond to type 2 fibers. These data reveal that fiber diameter is independent of the relative staining intensities observed in the population botulinum A toxin, as previously reported in this clinical setting [3,5,19]. One of the drawbacks of this treatment is the need for periodic injections [5].…”

“…These data reveal that fiber diameter is independent of the relative staining intensities observed in the population botulinum A toxin, as previously reported in this clinical setting [3,5,19]. One of the drawbacks of this treatment is the need for periodic injections [5]. The reported problem of tolerance to botulinum A toxin, owing to antibody production, may be circumvented by switching to botulinum type F, keeping in mind that the duration of action of botulinum F is shorter than botulinum A [19].…”

“…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.…”

“…The management of a painful unilateral temporalis muscle enlargement mandates a rigorous diagnostic evaluation of potential underlying causes, which may include inflammatory, neoplastic, vascular malformative, and myopathic processes, as well as reactive hypertrophy of the temporalis muscle [1][2][3][4][5]. Isolated unilateral temporalis muscle hypertrophy [4,5], also known as reactive masticatory muscle hypertrophy (RMMH) [3], is a rare cause of a painful soft tissue swelling of the temple.…”

“…Isolated unilateral temporalis muscle hypertrophy [4,5], also known as reactive masticatory muscle hypertrophy (RMMH) [3], is a rare cause of a painful soft tissue swelling of the temple. So our knowledge, this is the second report of RMMH with histochemical documentation of muscle hypertrophy with fiber type 1 predominance.…”