Interventional clinical trials and case series

Currently, no therapeutic interventions are approved for PHTS, however, a limited number of clinical trials have been undertaken using drugs approved for other conditions. Below, we have collected clinical trials and case series in which PHTS or Cowden syndrome patients were enrolled.

Active clinical trials

Official title: Sirolimus for Cowden Syndrome With Colon Polyposis (NCT04094675)

Status: Ongoing

This phase II, open-label, pilot trial aims to determine whether treatment with sirolimus can reduce colon polyps in patients with a PTEN germline mutation (estimated enrolment n=10). This project is receiving funding from PTEN Research.

Completed/terminated clinical trials

Official title: A Pilot Study of Sirolimus (Rapamycin, Rapamune[Registered Trademark]) in Subjects With Cowden Syndrome or Other Syndromes Characterized by Germline Mutations in PTEN (NCT00971789)

Status: Completed

The aim of this phase I, open-label, single-arm trial was to inhibit the mTOR pathway and assess the impact on tissues presenting with pathology, including benign as well as malignant tumours. Sirolimus treatment was generally well tolerated in patients (n=18, all of whom had a PTEN germline mutation) with improvements seen in cerebellar function, skin lesions and GI polyps, with tumour assessment showing stable disease in the subset of patients with radiographically measurable disease.

Komiya et al., 2019