28151916 Visualization

A 18 Age - year Age - old Age man Sex presented Clinical_event with a history of a palpable Detailed_description lump Sign_symptom in the presternal Biological_structure area Biological_structure , which was found incidentally after weight Sign_symptom reduction Sign_symptom .
The patient had no History other History relevant History medical History or History trauma History history History .
On physical Diagnostic_procedure examination Diagnostic_procedure , the lesion Coreference was found to be a nonmovable Detailed_description , firm Texture mass Sign_symptom with no tenderness Sign_symptom or associated skin Sign_symptom changes Sign_symptom , detected at the midline Biological_structure position Biological_structure over Biological_structure the Biological_structure sternum Biological_structure (at the manubrium Biological_structure level Biological_structure ).
There was no visible fistulous Sign_symptom opening Sign_symptom or discharge Sign_symptom from the lesion Coreference .
On ultrasonography Diagnostic_procedure , we detected a well Detailed_description - circumscribed Detailed_description , oval Shape , anechoic Lab_value mass Sign_symptom , with posterior Detailed_description acoustic Detailed_description enhancement Detailed_description , that measured about 3.3 Volume   × Volume   1.7 Volume   × Volume   3.1 Volume   cm Volume , and was located in the subcutaneous Biological_structure fat Biological_structure layer Biological_structure over the sternum Biological_structure .
In the dependent Biological_structure portion Biological_structure of the mass Coreference was an internal Detailed_description , well Detailed_description - circumscribed Detailed_description , heterogeneously Detailed_description hypoechoic Lab_value , egg Shape - shaped Shape lesion Sign_symptom (Fig.1A and B) showing a movement Detailed_description according Detailed_description to Detailed_description patient Detailed_description movement Detailed_description .
The mass Coreference could be compressed Lab_value using the linear Therapeutic_procedure transducer Therapeutic_procedure (Fig.2A and B).
A color Detailed_description Doppler Diagnostic_procedure study Diagnostic_procedure showed no vascularity Sign_symptom within the cystic Coreference mass Coreference or the internal Detailed_description hypoechoic Lab_value lesion Coreference (Fig.1C).
Surgical Therapeutic_procedure excision Therapeutic_procedure of the mass Sign_symptom was performed without postoperative Disease_disorder complications Disease_disorder .
Grossly, the excised mass Coreference was a well Lab_value - defined Lab_value , ovoid Shape , cystic Lab_value mass gray Color - tan Color in color.
On section, it Coreference was found to be a unilocular Lab_value cyst Sign_symptom filled with whitish Color mucous Sign_symptom material Sign_symptom .
Microscopically, the mass Coreference was lined with ciliated pseudostratified columnar epithelium suggestive of respiratory type-mucosa (Fig.3).
There was nonspecific Lab_value collagenous Detailed_description fibrosis Sign_symptom around the cyst.
The differential diagnosis of subcutaneous cyst included epidermal Disease_disorder inclusion Disease_disorder cyst Disease_disorder , thyroglossal Disease_disorder duct Disease_disorder cyst Disease_disorder , branchial Disease_disorder cleft Disease_disorder cyst Disease_disorder , and dermoid Disease_disorder cyst Disease_disorder .
There was no histological Sign_symptom evidence Sign_symptom of squamous Detailed_description epithelium Detailed_description , keratin Detailed_description , thyroid Detailed_description tissue Detailed_description , or skin Detailed_description appendage Detailed_description in the cystic wall of the present case.
The mass was diagnosed as a bronchogenic Disease_disorder cyst Disease_disorder .