"In this article, as per the ISSVA classification of vascular anomalies (c. 2018), intramuscular haemangiomas refer to the provisionally unclassified vascular anomalies category, which is distinct from venous malformations (VM), arteriovenous malformations (AVM), fibroadipose vascular anomaly (FAVA), PTEN hamartoma of soft tissue (PHOST), and angiomatosis of soft tissue (AST) ref."
"In this article, as per the ISSVA classification of vascular anomalies (c. 2018), intramuscular haemangiomas refer to the provisionally unclassified vascular anomalies category, which is distinct from venous malformations (VM), arteriovenous malformations (AVM), fibroadipose vascular anomaly (FAVA), PTEN hamartoma of soft tissue (PHOST), and angiomatosis of soft tissue (AST) ref."
"Their aetiology remains unknown at the time of writing 1. Pathogenic somatic mutations in MAP2K1 and KRAS genes have been described in a subset of cases, which overlap with mutations found in arteriovenous malformations 5."
"Imaging appearance cannot reliably distinguish between intramuscular haemangiomas and sarcomas, so biopsy has been recommended in all suspected cases 2. Other benign lesions may have similar appearances, such as PTEN hamartoma of soft tissue (PHOST) ref."
"Intramuscular haemangiomas are generally moderately hyperintense on T2WI, iso- or mildly hyperintense on T1WI and homogeneously hyperenhancing relative to skeletal muscle. They can have peri- and/or intra-lesional flow voids and fat content ref."
"In this article, as per the ISSVA classification of vascular anomalies (c. 2018), intramuscular haemangiomas refer to the provisionally unclassified vascular anomalies category, which is distinct from venous malformations (VM), arteriovenous malformations (AVM), fibroadipose vascular anomaly (FAVA), PTEN hamartoma of soft tissue (PHOST), and angiomatosis of soft tissue (AST) ref."
"In this article, as per the ISSVA classification of vascular anomalies (c. 2018), intramuscular haemangiomas refer to the provisionally unclassified vascular anomalies category, which is distinct from venous malformations (VM), arteriovenous malformations (AVM), fibroadipose vascular anomaly (FAVA), PTEN hamartoma of soft tissue (PHOST), and angiomatosis of soft tissue (AST) ref."
"Intramuscular haemangiomas are rare lesions 1. There is a peak in diagnosis in young adults and adolescents, but they are found in a wide age range, and most are thought to be congenital. There is no gender predilection 1,2."
"Intramuscular haemangiomas are rare lesions 1. There is a peak in diagnosis in young adults and adolescents, but they are found in a wide age range, and most are thought to be congenital. There is no gender predilection 1,2."
"The typical manifestation is a very slow-growing painless mass 2. They can cause chronic pain, especially after exercise 1-3. Rarely, they can result in functional impairment or deformity 3. There is generally no skin discoloration, warmth or palpable thrill 3. They can remain stable in size over time, show proportional growth to children or grow slowly disproportionately to patient size 2."
"Intramuscular haemangiomas can be diagnosed by a combination of imaging, pathological and possibly clinical features."
"The typical manifestation is a very slow-growing painless mass 2. They can cause chronic pain, especially after exercise 1-3. Rarely, they can result in functional impairment or deformity 3. There is generally no skin discoloration, warmth or palpable thrill 3. They can remain stable in size over time, show proportional growth to children or grow slowly disproportionately to patient size 2."
"form, location, size and imaging characteristics"
"Intramuscular haemangiomas are benign. Asymptomatic lesions can be initially treated conservatively. Surgical excision, with or without preoperative embolisation has been described for symptomatic cases ref."