Leiomyosarcomas of the lower extremity are heterogeneous tumors with high recurrence and metastasizing rates, which, rarely, can suffer a dedifferentiation process, making them extremely aggressive and unpredictable. We report the case of a 72-year-old female patient who presented the clinical and histopathological features of a rare leiomyosarcoma of the foot that was completely excised, but because of the interruption of adjuvant oncological treatment and lack of compliance for the follow-up, the patient suffered a dedifferentiation process and the tumor metastasized in the fingers-an unprecedented site for this type. The present case proves the fact that there is still a lot we do not know about the behavior of this disease, and there is always room to learn. Also, through this report, we are emphasizing a frequently encountered and never-ending problem in our country-that of difficult and resource-consuming cases derived from disconsidering medical advice by noncompliant patients when faced with a malignant diagnosis, making all attempts to offer them a better quality of life futile.
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