English to Spanish Medical Medical (general) MRI scan

Hi all,

I am translating a medical report and I am struggling with the term "semimembranosus origin tendinitis" in the following segment:


Conclusion:
Mild left>ight semimembranosus origin tendinitis.


This is a report on a MRI carried out on a patient who's got pain in her left hip (acetabular labrum tear). The report is full of typos and the wording of the sentences is quite confusing.

According to Fernando Navarro's Libro Rojo, "En inglés, en cambio, lo normal es utilizar attachment con este sentido amplio y llamar origin a la inserción proximal e insertion a la inserción distal de un músculo. En el ámbito de la miología, pues, el inglés insertion no corresponde a ‘inserción’ (attachment), sino a ‘inserción distal’."

My try is:

Tendinosis leve izquierda>derecha de la inserción proximal semimembranosa.

This is very important as it is the conclusion of the whole MRI scan. Any ideas?

Thank you so much,