A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report
The sternalis muscle is a rare supernumerary muscle representing a normal anatomical variant in the anterior thoracic musculature. Due to wide variation in its morphology and relative unfamiliarity among radiologists, it has been implicated in the misdiagnosis of breast masses on mammography. A 2...
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| Format: | Article |
| Language: | English |
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The Korean Society of Radiology
2025-01-01
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| Series: | Journal of the Korean Society of Radiology |
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| Online Access: | https://doi.org/10.3348/jksr.2024.0054 |
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| author | Victoria Kai Lin Tay Si Ying Tan Chow Yin Wong Lester Chee Hao Leong |
| author_facet | Victoria Kai Lin Tay Si Ying Tan Chow Yin Wong Lester Chee Hao Leong |
| author_sort | Victoria Kai Lin Tay |
| collection | DOAJ |
| description | The sternalis muscle is a rare supernumerary muscle representing a normal anatomical
variant in the anterior thoracic musculature. Due to wide variation in its morphology and
relative unfamiliarity among radiologists, it has been implicated in the misdiagnosis of breast
masses on mammography. A 23-year-old male with no significant medical history was referred
to our institution for further management of painless bilateral breast enlargement
since adolescence. Physical examination revealed breasts of slightly prominent size but
there was no palpable breast lump. Mammography work-up found symmetrical, well-defined
soft tissue masses projected over the posteromedial aspect of both breasts. Imaging
findings were consistent with bilateral sternalis muscles, unusually hypertrophic in size due
to intense upper body weight training by the patient. This case highlights the importance of
recognizing the usual and unusual presentations of the sternalis muscles on mammography
to avoid any unnecessary work-up. |
| format | Article |
| id | doaj-art-44b085e87e2642abaa6a822cd0ce30bd |
| institution | Kabale University |
| issn | 2951-0805 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | The Korean Society of Radiology |
| record_format | Article |
| series | Journal of the Korean Society of Radiology |
| spelling | doaj-art-44b085e87e2642abaa6a822cd0ce30bd2025-01-31T07:47:07ZengThe Korean Society of RadiologyJournal of the Korean Society of Radiology2951-08052025-01-01861160165https://doi.org/10.3348/jksr.2024.0054A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case ReportVictoria Kai Lin TaySi Ying TanChow Yin WongLester Chee Hao LeongThe sternalis muscle is a rare supernumerary muscle representing a normal anatomical variant in the anterior thoracic musculature. Due to wide variation in its morphology and relative unfamiliarity among radiologists, it has been implicated in the misdiagnosis of breast masses on mammography. A 23-year-old male with no significant medical history was referred to our institution for further management of painless bilateral breast enlargement since adolescence. Physical examination revealed breasts of slightly prominent size but there was no palpable breast lump. Mammography work-up found symmetrical, well-defined soft tissue masses projected over the posteromedial aspect of both breasts. Imaging findings were consistent with bilateral sternalis muscles, unusually hypertrophic in size due to intense upper body weight training by the patient. This case highlights the importance of recognizing the usual and unusual presentations of the sternalis muscles on mammography to avoid any unnecessary work-up.https://doi.org/10.3348/jksr.2024.0054case reportmammographymale breast cancergynecomastia |
| spellingShingle | Victoria Kai Lin Tay Si Ying Tan Chow Yin Wong Lester Chee Hao Leong A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report Journal of the Korean Society of Radiology case report mammography male breast cancer gynecomastia |
| title | A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report |
| title_full | A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report |
| title_fullStr | A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report |
| title_full_unstemmed | A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report |
| title_short | A Rare Normal Variant with an Unusual Presentation on a Male Mammogram: A Case Report |
| title_sort | rare normal variant with an unusual presentation on a male mammogram a case report |
| topic | case report mammography male breast cancer gynecomastia |
| url | https://doi.org/10.3348/jksr.2024.0054 |
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